DiffuthermWoodfibre Insulation
“The Science of Nature - The Future of Construction”“The Science of Nature - The Future of Construction”
Diffutherm—Woodfibre Wall Insulation
Diffutherm Boards Are Natural Made from 99.5% waste softwood and 0.5% inert water-proofing additives Diffutherm boards are a genuinely sustainable non-toxic building material. To make Pavatex boards, waste wood fibres are pulped and mixed with water. The pulp is heated to activate the lignin they contain in order to glue the fibres together. The pulp is then pressed into boards, dried, and cut to size. Diffutherm Boards are High Performance The advanced manufacturing process uses the in-herent properties of wood fibres to produce boards with many excellent technical qualities for thermal and acoustic insulation, thermal storage capacity, vapour permeability and moisture control. Different density sheets are laminated together and the boards interlock on all edges to optimise mechanical properties, strength and stability, moisture and air resistance and render adhesion. Diffutherm is a complete system Diffutherm boards are supplied with fully compati-ble fixings, renders and accessories for all types of wall applications. The system is backed up with full design and instal-lation guidance to ensure long term durability, high performance of the building shell, health of the building and user comfort.
The Diffutherm system has many applications The system can be used for New Buildings, ap-plied directly to timber or steel stud frames and to all types of solid masonry. It can also be used for internal and external Refurbishment of exist-ing masonry and traditionally framed timber buildings. The Diffutherm system adds the effect of ther-mal mass to lightweight buildings and provides a fully “ breathable” method for up-grading solid walls. Diffutherm boards are good for the Environment The manufacture of the boards in Switzerland is carried out under tight environmental controls to minimise energy use, emissions and pollutants. The boards are made of waste wood and lock up CO2 in their production. Substituting Diffutherm for common synthetic boards provides even more benefits for the health of the environment, buildings and their occupants.
The Diffutherm System is • Complete and fully integrated • Tested, certified, and proven in practice • Quick and simple to install • Cost efficient • High performance • Multi-functional • Environmentally Sound
a complete system for external and internal wall insulation
Natural Building Technologies Ltd - The Hangar, Worminghall Road, Oakley, Bucks HP18 9UL
Diffutherm—Performance Guide
A modern wall insulation system must do more than just protect building occupants from cold. It must create a comfortable and healthy environment for the building users in all possible combinations of ex-ternal and internal conditions and control the effects of external heat, cold, noise and internal moisture generation. The Diffutherm System…..
Keeps the building warmer for longer in cold weather. Low thermal conductivity and high vapour permeability provide high thermal insulation with no risk of interstitial condensa-tion. Vapour control membranes are unnecessary. When applied externally onto masonry walls, the masonry stays warm and dry, so enhancing its thermal storage capacity. When used on studwork the boards reduce the effect of ther-mal bridging and the interlocking board design easily achieves good air-tightness so increasing thermal performance. Energy use for heating is significantly reduced leading to lower CO2 emissions and running costs.
Keeps the building cooler in hot weather. The unique combination of high density, high specific heat ca-pacity and low thermal conductivity gives lightweight framed constructions the effect of thermal mass that would normally be associated with masonry. Compared to conventional framed constructions Diffutherm systems can keep the internal tem-perature up to 4ºC cooler over the course of a hot day. Used externally, Diffutherm slows the transmission of outside temperature extremes to the inside of the building (expressed as decrement delay). The outside daytime temperature peak is delayed in reaching the inside spaces for up to 14 hours when it will reduce the need for additional heating during evening time. Used internally the high thermal storage capacity of the boards allows excess heat to absorbed so improves internal comfort. Diffutherm moderates temperature variations inside the building and greatly improves the comfort of the occupants while reducing the need for extra cooling and ventilation.
Keeps internal humidity stable. When applied to internal wall surfaces, the hygroscopic na-ture of Diffutherm in combination with NBT mineral and clay plasters allows rapid absorption of moisture when inter-nal humidity is high, for example during cooking, washing and drying clothes. The moisture can in turn be released quickly when internal conditions are drier. This effect is important for good health and comfort of the occupants and prevents the growth of moulds, fungi, and dust mites.
Diffutherm—Performance Guide
Keeps the building fabric dry. Diffutherm is very vapour permeable and hygroscopic. This allows it to disperse short term moisture accumulating and protect vulnerable elements of the building fabric, with no reduction in the performance of the boards themselves. When used externally Diffutherm allows moisture from within the structure to pass easily to the outside. This pro-vides a safeguard against high moisture which cause decay in timber structures, ensures that masonry structures re-main dry so improving their thermal performance and pre-vents mould growth within fabric of inner face. When applied directly to the inside face of traditional frame timbers and solid wall masonry buildings the hygro-scopic nature of Diffutherm eliminates risks from interstitial condensation and controls the moisture content of any em-bedded timber, e.g. floor and ceiling joists, to below 19%. This is vital for the long-term health of the building fabric, and is completely overlooked by most conventional dry-lining and internal insulation systems.
Keeps the building quieter. The high mass, and fibrous texture of Diffutherm combined with the different density of the board layers gives excel-lent acoustic performance. Diffutherm gives by far the best results for noise absorption and reducing airborne and im-pact noise transmission over all frequencies compared with all other insulation boards. This gives mass performance to light-weight buildings and eliminates flanking sound prob-lems are when insulating solid masonry.
Keeps its integrity in fire. Diffutherm is timber and, in common with other timber products, the boards char when exposed to fire to form an insulating layer which slows down the progress of the flames. In combination with the NBT mineral renders the Diffutherm system has over 30 minutes resistance to penetration by fire.
Is an environmental benefit Diffutherm is fully certified under Natur Plus, (the environmental standard set up by the WWF) and the wood waste raw material is from FSC certified sources. The fuel used in the factories is mainly waste animal fats, and the boards lock up 1.2 tonnes of CO2 (from the wood waste) for every tonne of product produced. After accounting for manufacturing emissions there is still a net positive CO2 balance of approximately 600kg per tonne of product. When substituted for more common synthetic products the boards provide an even better environmental balance. By improving building performance they enhance the health of the environment, buildings and their occupants.
Diffutherm—Woodfibre Wall Insulation
*Contact NBT for calculations of other system combinations. Advantages • Substantial savings on build cost compared with conventional timber frame and ren-
dered masonry construction • Simple construction with fewer layers allows slimmer construction and improved per-
formance compared with conventional timber frame and masonry construction • Highly vapour permeable construction without membranes or vented cavities has no
risk of interstitial condensation or decay • Thermal storage and acoustic performance compares well with heavyweight buildings • Simple, robust construction has few skilled operations and is easily adapted for off-site
manufacture • Diffutherm system locks up C0² and waste can be safely composted • Materials are non-toxic, non-irritant, safe to handle and have zero emissions once in-
stalled • Improves Airtightness • Reduces thermal bridging at reveals and openings so reduces interstitial condensation
a complete system for external and internal wall insulation
System Combinations * (Based on Using Blown Warmcel between studs @ 600 Ctrs)
89 Studs + 60mm Diffutherm
89 Studs + 80mm Diffutherm
140 Studs + 60 Diffutherm
140 Studs + 80mm Diffutherm
U-Value (W/m²K) 0.25 0.22 0.19 0.18
Admittance (W/m²K) 1.55 1.55 1.55 1.55
Decrement Delay (Hours) Decrement Improve-ment (Over conven-tional EPS system with same U-Value)
8.4
5.2
10.2 7
10.4
7.2
12.4
8.4
8mm Meshed Baumit-Bayosan External Render System
Diffutherm Woodfibre Board
3mm Skim Plaster finished with NBT Breathable emulsion or Beeck Insil Mineral Paint
“Vapour Open” Insulation (Blown Warmcell, Hemp/Cotton, Sheepswool, Mineral Wool Etc.)
12.5 Plasterboard
25 x 40mm Batten
25mm Service Void
9mm OSB (all joints taped and sealed—see spec.)
89, 140 or 175mm Stud
NBT Systems NW1New Build Wall 1
®
Inside Outside
Insulation Fixing
Diffutherm—Woodfibre Wall Insulation
*Contact NBT for calculations of other system combinations. Advantages • Simple and robust construction • Weathertight so no need for cavities and complicated venting details • Highly vapour permeable construction does not need membranes to control interstitial
condensation • Masonry substrate stays dry improving thermal insulation and storage capacity • Effect of outside temperature peaks on inside environment is reduced • Internal surfaces are warmer so reduces condensation • Thermal mass of Diffutherm gives greater stability to render—preventing cracking • Excellent acoustic performance compared to conventional EWI materials • Diffutherm system locks up C0² and waste can be safely composted • Materials are non-toxic, non-irritant, safe to handle and have zero emissions once installed • Improves Airtightness • Reduces thermal bridging at reveals and openings so reduces interstitial condensation
a complete system for external and internal wall insulation
System combinations
Aerated Block (k=0.11) 215mm + 80mm Diffutherm
Plan-Ziegel ZA50 175mm Block +
100mm Diffutherm
Refurb / Retrofit 215mm Brick +
100mm Diffutherm
Refurb / Retrofit 450mm Sandstone
+100mm Diffutherm
U-Value (W/m²K) 0.28 0.35 0.36 0.37
Admittance (W/m²K) 2.20 4.15 4.27 4.91
Decrement Delay (Hours) Decrement Improve-ment (Over conven-tional EPS system with same U-Value)
14.5
4.4
13 3
15
4.1
21
5.6
8mm Meshed Baumit-Bayosan External Render System 18mm Plaster finished with NBT
Breathable emulsion or Beeck Insil Mineral Paint
Inside Outside
Diffutherm Woodfibre Board
Basecoat Bedding Mortar/ Regularising / Bonding Mortar Masonry Substrate
Insulation Fixing
Diffutherm—Woodfibre Insulation Boards
Technical DataStandards DIN 68755 Part One Thickness (mm) 60 80 100 Overall Length (mm) 1300 1300 1300 (Includes 15 mm Tongue) Board Face Length (mm) 1285 1285 1285 Overall Width (mm) 790 790 790 (Includes 15 mm Tongue) Board Face Width (mm) 775 775 775 Board Face Area (m2) 1.0 1.0 1.0 Density (kg/m3) 190 190 190 Weight per m2 (kg/m2) 5.5 8.75 15.12 Board Weight (kg) 11.28 16.37 19.37 k Value (W/mK) 0.044 0.044 0.044 Specific Heat Capacity (J/kgK) 2100 2100 2100 Diffusion Resistance Factor (µ) 5 5 5 Sd Value (m) 0.3 0.4 0.5 Compression Resistance (kN/m²) 100 100 100 (@ 10% Deformation) Reaction to Fire (BSEN13501) E E E Fixing per board on studwork 3 per stud (min 2 studs) Fixing per board on masonry 9 per board Dry - 6 with bonding Mortar Boards per pallet 30 22 18 Area per pallet (m2) 30 22 18 Pallet Weight (kg) 387 375 381
D i f f u t h e r mW o o d f i b r e
“The Science of Nature - The Future of Construction”“The Science of Nature - The Future of Construction”
External Wall Insulation Systemfor Timber or Metal Studwork
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NBT Systems NW1
New Build Wall 1
®
3mm Skim Plaster finished
with NBT Breathable
emulsion or Beeck Insil
Mineral Paint
8mm Meshed
Baumit-Bayosan
External Render
System
Pavatex Diffutherm
Woodfibre
Insulation Board
Insulation Fixing
“Vapour Open” Insulation
(Blown Warmcell,
Sheepswool,
Hemp/Cotton,
Mineral Wool etc. )
12.7mm Plasterboard
25mm Service void
25 x 40mm Batten
89, 140 or 175mm
Timber or Metal Stud
9mm OSB (all joints taped
and Sealed - see spec)
Inside Outside
Natural Building Technologies LtdThe Hangar Worminghall Road Oakley Bucks HP18 9ULTel: +44 (0)1844 338338 Fax: +44(0)1844 338525email: [email protected] web: www.natural-building.co.uk
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200mm larger than area of damage/repair.
(See 1.06 - Render System.)
:
At all openings, service penetrations and free
edges, seal the board to the structure using
Compriband VSA No: CC0125015600 to
create an air and weather-tight joint.
:
Above Plinth Area :
Apply ….mm APU rails to all door and window
frames to form a weather-tight joint.
Apply diagonal strips of mesh reinforcement
across the corners of all openings and
continuous strips of mesh reinforcement
above the base rail and along all free board
edges (as NBT recommendations) into 2mm
of MC55W mortar.
Apply MC55W mortar to all corners and
reveals and set fibreglass mesh beads
……………. plumbed and aligned to a
render depth of 5 - 8mm.
Hand or machine apply MC55W over the
board surface and straighten out. Comb with
a tooth trowel to an overall depth of 4 - 6mm
then place sheets of fibreglass mesh lightly
onto the render (min 100mm laps).
Apply a further 2 - 3mm coat of MC55W and
smooth out. On hardening, scrape back the
surface with the edge of a trowel.
Apply …………….. decorative finish coat after
6 days.
Apply …………….. equalising paint after 6
days.
1.05 Openings and Abutments
1.06 Render System
Specification for Diffutherm EWI
system onto timber or metal frame
1.0 General
1.01 Access
1.02 Adverse Weather
1.03 Board System
1.04 Fixing Boards
:
The system comprises Pavatex Diffutherm boards and
Bayosan thin mesh coat renders supplied together with
all accessories by NBT
:
Scaffolding and access to the work must be
carried out in accordance with current CDM
and Health and Safety Regulations
:
Application of the system must only take place
in suitable weather conditions in accordance
with NBT recommendations and good
rendering practice, protecting the works if
necessary. Do not apply the Diffutherm System
in ambient temperatures below 5º C. Boards
should be rendered within 2 months. Boards
should be stored flat and dry. Edges should be
protected to prevent damage to tongue.
:
Below dpc and in the plinth area (< 150mm
above finished ground level) use EPS plinth
boards; above the plinth area use Pavatex
Diffutherm boards.
:
Above Plinth Area :
Fix the base rail …………… above dpc to each
stud packed to true line and level, using 1 No.
…………….. fixing per stud.
Locate the 1 course of Diffutherm boards
tightly in the base rail channel with grooved
side down and edge t & g joints fully engaged.
Fix through the boards into the studs using 3 No.
…………. fixings / board / stud.
Boards must span at least 2 studs. Board edges
need not coincide with stud positions, which
should be at < 600mm centres. The faces of
the boards should be flush. Stagger fixings
where board edges coincide with a stud
position.
Install 2 course in ½ bond pattern with
minimum overlap 200mm, over-lapping board
ends at vertical corners, ensuring all board joints
are fully engaged and tightly joined. Fix to studs
as for 1 course. Fill any gaps and areas of
damaged boards with loose Woodfibres and
apply a “patch” of reinforcing mesh at least
st
nd
st
Diffutherm InsulationDiffutherm InsulationSpecification.
EWI onto Timber or Metal Studwork
Natural Building Technologies LtdThe Hangar Worminghall Road Oakley Bucks HP18 9ULTel: +44 (0)1844 338338 Fax: +44(0)1844 338525email: [email protected] web: www.natural-building.co.uk
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Boards and Renders
Do not use Diffutherm boards below DPC level. Use
boards suitable for wet exposure (EPS, XPS) in the
plinth area (ie. within 0.15m of Ground Level). Refer to
Detail 4.
For air and wind-tightness seal the boards against the
structure at all joints, intersections, openings and
penetrations and along all edges using Compriband
strip.
For weather-tightness, seal the render around all
openings using the appropriate APU strips (Details 2, 3
and 5).
Light coloured finishes (light intensity > 40%) and
coarse-grained finishes (2-5mm grain sizes) are
preferred for long-term durability and appearance.
Cracking of the render system cannot be completely
avoided. Minor cracking is not detrimental to the
system and the board will not deteriorate if the cracks
are small and repaired quickly.
Apply equalisation paint to the finish render coat to
avoid discolouration from uneven drying.
To select paints for applying to the finished surface
without significantly reduction of the vapour
permeability of the Diffutherm System, refer to NBT.
General
The Diffutherm System is certified for use in rain
Exposure Zones 1, 2 and 3 (described in BS 8104 and
the BRE report “Thermal Insulation, avoiding risks”).
If intended for use in Exposure Zone 4, contact NBT
for advice.
The Diffutherm System is certified for use in buildings
where the height to the top floor is < 8m.
If intended for use in higher buildings, contact NBT for
advice.
The Diffutherm System must be designed so that no
loads from the structure are carried by the boards or
render.
Design a positive strategy for avoiding rain
penetration of the EWI system. This will include :
generous overhangs for roofs, cills and copings (in no
case < 30mm)
drip details on all overhangs
careful detailing of flashings at critical areas eg.
balconies, decks, walkways, parapets, copings,
service penetrations, roof abutments, intersecting
and adjoining buildings, etc.
window and door frames set back from the external
face of the wall by at least the thickness of the
insulation boards.
Carefully detail the OSB layer for air-tightness at all
openings and at internal corners and junctions.
Carefully detail the Diffutherm layer for wind-
tightness at all openings and in the plinth area.
Movement joints in the substrate must be
incorporated into the Diffutherm EWI System.
Consider movement joints for walls longer than 18m.
Only lightweight fittings can be attached directly to
the Diffutherm boards. Carefully plan the location of
down-pipes, lights, security systems etc. and attach
using fixing disks screwed directly to the structure.
Contact NBT for further advice on fixings.
Provide the Contractor with full and complete details
for all critical areas of the system including those
listed above leave nothing 'to be agreed on site'
The system can only be guaranteed if only the
boards, mortars, renders and accessories approved
by NBT are used.
Diffutherm InsulationDiffutherm Insulation
Key Considerations for DesignersEWI onto Timber or Metal Studwork
Natural Building Technologies LtdThe Hangar Worminghall Road Oakley Bucks HP18 9ULTel: +44 (0)1844 338338 Fax: +44(0)1844 338525email: [email protected] web: www.natural-building.co.uk
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Renders
Do not apply the render system onto rain-soaked
boards or when the air temperature is below 5C and
avoid working in strong, direct sunlight.
The reinforcing mesh sheets should lie in the outer 1/3
of the basecoat layer and sheets should overlap by
at least 100mm.
Additional mesh reinforcement is required around all
openings, along all corners and edges, across zones
where suspended floors intersect walls and where
boards are applied over different substrates, along
continuous straight board joints and over repaired
areas.
Seal the render around all openings using the
appropriate APU strips (Details 2, 3 and 5).
Allow 1 day/mm thickness drying time for the
basecoat before applying the topcoat.
Apply equalisation paint to the finish render coat to
avoid discolouration from uneven drying.
Cracking of the render system cannot be completely
avoided. Minor cracking is not detrimental to the
system and the board will not deteriorate if the cracks
are small and repaired quickly.
General
The Diffutherm System must only be installed by
approved contractors who have been trained by NBT.
The details and specifications in this guide and from
the Designer should be followed as the basis of a
successful installation.
The system can be guaranteed only if the boards,
mortars, renders and accessories approved by NBT
are used in the proper specified manner.
Masonry substrates must be sound, compatible with
the bonding mortar and mechanical anchors, flat
(dubbed out if necessary to avoid excessive thickness
of the meshed render), free of loose material and
problems associated with damp or structural
movement.
Timber frames must not be excessively wet when the
boards are applied to avoid trapping moisture within
the construction.
Movement joints in the substrate must be
incorporated into the Diffutherm System.
Only lightweight fittings can be attached directly to
the Diffutherm boards. Carefully plan the location of
down-pipes, lights, security systems etc. and attach
using fixing disks screwed directly to the structure.
Contact NBT for further advice on fixings.
The Diffutherm System must only be installed by
approved contractors who have been trained by NBT.
The details and specifications in this guide and from
the Designer should be followed as the basis of a
successful installation.
The system can be guaranteed only if the boards,
mortars, renders and accessories approved by NBT
are used in the proper specified manner.
Timber frames must not be excessively wet when the
boards are applied to avoid trapping moisture within
the construction.
Movement joints in the substrate must be
incorporated into the Diffutherm System.
Only lightweight fittings can be attached directly to
the Diffutherm boards. Carefully plan the location of
down-pipes, lights, security systems etc. and attach
using fixing disks screwed directly to the structure.
Contact NBT for further advice on fixings.
Boards
Diffutherm InsulationDiffutherm Insulation
Key Considerations for InstallersEWI onto Timber or Metal Studwork
Design & Installation DetailsEWI onto Timber or Metal Studwork
Natural Building Technologies LtdThe Hangar Worminghall Road Oakley Bucks HP18 9ULTel: +44 (0)1844 338338 Fax: +44(0)1844 338525email: [email protected] web: www.natural-building.co.uk
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Key to Details
Diffutherm InsulationDiffutherm Insulation
1
32
23
4
5
67
1 System Components
2 Verge Detail
3 Eaves Detail
4 Plinth Detail
5 Sill Detail
6 Additional Meshing
7 Board Pattern
1 Diffutherm Insulation Board
2 Baumit-Bayosan
MC55W Render
3 Bayosan AG01 Mesh
4 Bayosan Decorative Finish*
5 Timber or Metal Studwork
6 Wemico Mesh Corner Bead
7 Wemico Base Rail
8 Fisher Termofix 6H Fixing
(Termofix H&B for Metal)
9 Inner Sheathing
10 Insulation Material (Vapour
permeable)
1
Compriband VSA
Compriband VSA
Pavatex Diffutherm
Woodfibre Board
Pavatex Diffutherm
Woodfibre Board
Baumit-Bayosan
MC55W
(Fully Meshed)
Baumit-Bayosan
MC55W (Fully Meshed)
Baumit-Bayosan
Decor Finish &
Equalisation Paint
Baumit-Bayosan
Decor Finish &
Equalisation Paint
Natural Building Technologies LtdThe Hangar Worminghall Road Oakley Bucks HP18 9ULTel: +44 (0)1844 338338 Fax: +44(0)1844 338525email: [email protected] web: www.natural-building.co.uk
Diffutherm InsulationDiffutherm Insulation
Design & Installation DetailsEWI onto Timber or Metal Studwork
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Plinth Area:
150above
Finished
Ground Level
Facade Area
Compriband VSA
Plinth Board
French Drain
Plinth Detail B
Plinth Detail A
Bitumen Impregnated
Protection Board
Pavatex Diffutherm
Woodfibre Board
Pavatex Diffutherm
Woodfibre Board
Baumit-Bayosan
MC55W (Fully Meshed)
Baumit-Bayosan
MC55W (Fully Meshed)
Baumit-Bayosan
Decor Finish &
Equalisation Paint
Baumit-Bayosan
Decor Finish &
Equalisation Paint
Baumit-Bayosan
Decor Finish
Baumit-Bayosan
Hm50 (fully meshed
& rubbed up as
finish)
4b
4bFacade
French Drain
Plinth Area:
150above
Finished
Ground LevelCompriband VSA
Baumit-Bayosan
Equalisation Paint or Silicate Paint
Baumit-Bayosan
Hm50 (fully meshed & rubbed up as finish)
Baumit-Bayosan
Hm50 (fully meshed)
Bitumen Impregnated Protection Board
Plinth Board
Baumit-Bayosan
Equalisation Paint
Baumit-Bayosan
Decor Finish
Natural Building Technologies LtdThe Hangar Worminghall Road Oakley Bucks HP18 9ULTel: +44 (0)1844 338338 Fax: +44(0)1844 338525email: [email protected] web: www.natural-building.co.uk
Diffutherm InsulationDiffutherm Insulation
Design & Installation DetailsEWI onto Timber or Metal Studwork
ZO NES REQUIRING ADDITIO NAL
M ESH REINFORCEM ENT
1 Diagonal Strip 250mm x 500
Mesh Corner Beads2
Mesh Strip 150m m wide3
2
22
22
2
11
1
3
3
3
2
To reduce the risk of the render cracking, additional mesh reinforcement
is required along all exposed board edges and around all openings.
Bed the mesh in M C55W m ortar and then apply the main meshed render
layer, overlapping w ith the edge strips by at least 100mm.
In the diagram additional mesh is shown across the corners of w indow
and door openings (1), along all reveals and corners (2), over the starter
track and below window sills (3).
An additional band of mesh should be applied across the zone where
suspended floor joists bear onto the timber fram e walls.
6
Set out Diffutherm Boards so that board edges
DO NOT coincide with the corners of wall
openings.
Always ensure that the vertical joints are
staggered by at least 200mm between
courses and that each board is supported on
at least 2 studs.
Board joints DO NOT have to terminate on a
stud due to the tongue groove board edge.
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7 Compriband Strip
8 APU Rail
9 Render Finish
10 Sill Profile
11 Door / Window Frame
1
1
1
22
2
3
3
4
4
4
5
5 6
6
7
7
7
78
8
9
9
9
10
1
10
11
12
1211
1 Substrate
2 Diffutherm Board
3 Reveal Board
4 Reinforcing Mesh
5 Mesh Corner Bead
6 Fixing
5
6
1 Diagonal Strip 250mm x 500mm
2 Mesh Corner Beads
3 Mesh Strips 150mm Wide
4 Mesh strip 500 wide at Floor Level
4
(4)
Natural Building Technologies LtdThe Hangar Worminghall Road Oakley Bucks HP18 9ULTel: +44 (0)1844 338338 Fax: +44(0)1844 338525email: [email protected] web: www.natural-building.co.uk
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Installation Procedure
The substrate should be dry, clean and flat. Do not apply the Diffutherm System in ambient temperatures below 5 C°
Base Rail
Above Plinth Area :
Fix the base rail and corner rail above DPC to each
stud packed to true line and level, using 1 fixing per
stud. Rail connector clips should be fitted at all rail
joints.
Attach clip on drip profile to entire run of base and
corner rail.
Diffutherm InsulationDiffutherm Insulation
Installation Procedure (1)EWI onto Timber or Metal Studwork
Compri-band
Where boards butt up to other substrates a Compri-
band sealing strip should be inserted to allow for
differential movement and provide a weather tight
seal. Such areas include window and door frames, sills,
eaves and soffit boards.
1 Compriband
2 Diffutherm
3 Meshbead4 MC55W / mesh5 Finish render6 Reveal board7 APU rail8 Fixing
1 Diffutherm board
2 MC 55W render
3 Mesh
4 Decorative finish
5 Studs
6 Mesh bead
7 Base rail
8 Fixings
9 Inner sheating
10 Insulation material
Diffutherm Boards
Locate the 1 course of Diffutherm boards tightly in the base rail channel with grooved side down and edge t & g joints
fully engaged. Fix through the boards into the studs using 3 fixing / board / stud. Boards must span at least 2 studs. Board
edges need not coincide with stud positions, which should be at < 600mm centres. The faces of the boards should be
flush. Stagger fixings where board edges coincide with a stud position.
Install 2 course in ½ bond pattern, over-lapping board ends at vertical corners, ensuring all board joints are fully
engaged and tightly packed. Fix to studs as for 1 course.
st
nd
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Apu rails
Apply Apu rails to door and window frames to form a
wind and waterproof expansion joint. The Apu rail has
a sticky foam backing which adheres to the frame.
This prevents thermal bridging. A stiff protection strip
with a sticky surface allows enables polythene or
paper to be attached to protect the window or door.
This strip is peeled away on completion of rendering
leaving a clean neat finish.
1 Foamed backing
2 Protection strip
3 APU rail
4 Mesh
5 Substrate
6 MC55W
7 Finish render
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Installation Procedure
Additional Meshing
Trowel 2mm of MC55W diagonally onto the corner
faces of all openings and smooth in strips of mesh
(25x50mm).
Trowel MC55W onto all corners and reveals and set
fibreglass mesh beads into the mortar, plumb and in
alignment, to a render depth of 5-8mm.
Diffutherm InsulationDiffutherm Insulation
Installation Procedure (2)EWI onto Timber or Metal Studwork
Render System
Trowel or machine-apply MC55W over the boards and straighten out the render. Using a tooth trowel comb through
the render to ensure an overall render depth of 4-6mm.
Place sheets of fibreglass mesh lightly onto the render, with overlaps not less than 100mm.
On stiffening apply another coat of MC55W 2-3mm thick and smooth out. On hardening rough up the surface using
the edge of a trowel.
After six days apply a decorative finish coat
or
Oversills
Oversills should be fitted using one of the options
shown above prior to rendering. Apply a Compr-
band between the lower face of the sill and the
upper edge of the Diffutherm to form a weather tight
seal.
A minimum overhang distance of 30mm from front
of sill to render face should be maintained at all
times.
Face
Fix
Side
Fix
1 Compriband
2 Sill
3 Substrate
4 Diffutherm
5 MC55W / mesh
6 Finish render
30
mm
Movement Beads
Where structural movement
joints or changes in substrate
occur a movement bead
should be incorporated into
the Diffutherm system to
prevent cracking due to
differential movement.
Reveals
Fully paste the rear side of the reveal boards using
MC55W and trowel through using a tooth trowel.
Apply a compri-band along the edge of the board
and place the board tightly up against the window or
door frame.
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Natural Building Technologies LtdThe Hangar Worminghall Road Oakley Bucks HP18 9ULTel: +44 (0)1844 338338 Fax: +44(0)1844 338525email: [email protected] web: www.natural-building.co.uk
Diffu
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Components & Accessories
Diffutherm onto Timber or Metal Stud
1 Pavatex Diffutherm Insulation Board
2 Bayosan MC55W or RK70N Render
3 Bayosan AG01 Reinforcing Mesh
4 Bayosan Decorative Finish *
5 Timber or Metal Stud Substrate
6 Wemico Mesh Corner Bead
7 Wemico Base Rail & Clip on Profile
8 Fischer TermoFix 6H range of fixings for Timber StudsOr TermoFix H&B range of fixings for Metal Studs
* Can be further decorated with the Beecks range of mineral finishes
Diffutherm InsulationDiffutherm Insulation
Base Rail.
Clip on Profile.
Mounting Set. (optional)
2.5m Length Base rail for 60mm Diffutherm:Stainless Steel No: 2146 Aluminium No: 9146
2.5m Length Base rail for 80mm Diffutherm:Stainless Steel No: 2148 Aluminium No: 9148
2.5m Length Base rail for 100mm Diffutherm:Stainless Steel No: 2150 Aluminium No: 9150
Used to support first row of Diffutherm boards(Must be set above DPC level).
2.5m Length Clip on Profile for 6mm Thick Render:Stainless Steel No: 2134 Aluminium No: 9121
2.5m Length Clip on Profile for 10mm Thick Render:Stainless Steel No: 2130 Aluminium No: 9124
Clip on drip profile for attaching to Base Rail.
Base rail mounting set containing the following:75 x Fixings 50 x 3mm Packers/Spacers and 10 x40mm Rail Connectors Pack No: 3757
Set of mounting components for base rail
Base Rail
Clip on
Profiles
Fixing
Spacer
Rail Connector
Board
Thickness
+3mm
Wemico Components conform to the following standards:Stainless Steel Products: BS 1449/2: 1983 EN10088/2: 1995 (stainless steel 304Grade) Aluminium Products: EN485/4: 1994
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Components & Accessories
Diffutherm InsulationDiffutherm Insulation
Corner Rail
Render Stop
Wall Coping
Movement Beads
73cm Length Corner rail for 60mm Diffutherm:Stainless Steel No: 2416 Aluminium No: 9286
Stainless Steel No: 2418 Aluminium No: 928873cm Length Corner rail for 80mm Diffutherm:
73cm Length Corner rail for 100mm Diffutherm:Stainless Steel No: 2420 Aluminium No: 9290
Precut section of base rail for forming corners.
2.5m Length Render Stop for 60mm Diffutherm:Stainless Steel No: N/A Aluminium No: 9156
2.5m Length Render Stop for 80mm Diffutherm:Stainless Steel No: N/A Aluminium No: 9158
2.5m Length Render Stop for 100mm Diffutherm:Stainless Steel No: N/A Aluminium No: 9160
Box shaped render stop bead for edge protection ofDiffutherm boards on vertical terminations.
2.5m Length WEC731 & WEC741 Type Coping forvarious overall system widths - please enquire
3m Length 2320 Stainless Steel Movement Bead for8mm Thick Render (Vertical Applications only).
3m Length 2332 Stainless Steel Movement Bead for8mm Thick Render (Vertical Applications only).
Movement / Expansion joint beads for creatingvertical expansion joints along wall line or at internalcorner joints.
Corner Rail
Render Stop
Movement Beads
2320 2332
Board
Thickness
+3mm
WEC731 TYPE WEC741 TYPE
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Components & Accessories
Diffutherm InsulationDiffutherm Insulation
Corner Beads
APU Rail
Sealing Band
2.5m Length Corner Bead with fibre glass meshattached for External CornersPVC No: 3707 Stainless Steel No: 2031
For embedding in the render for forming edges onexternal corners.
2.6m Length APU Sealing Rail.PVC No: 3276
Used for a watertight seal to window and doorframes. Self-adhesive stip is removed then APU railis stuck to window / door frame. Self- adhesive bandcan be removed to enable a protective sheet to beapplied to cover door and windows - this is thendiscarded by breaking away the removableprotection strip.
Size 4 No: Cc0125015600
Bitumen impregnated movement seal for abutmentsto window and door frames to ensure watertightexpandable seal between render and APU rail(See www.compriband.co.uk for further details.)
6m Length Compriband VSA Sealing Strip
Corner Beads
APU RailRemovable
Protection
Strip
Self-Adhesive
Band
3707
3726
2031
Self-Adhesive
Strip
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Components & Accessories
Diffutherm InsulationDiffutherm Insulation
Oversills - Standard Profiles
Oversills - Special Profiles
2.5m Lengths of white coated 1.2mm Aluminiumoversill profile. (WEC721 and WEC751 only)available in the following sizes:
WEC721/70 To suit 70mm System depth (60mmDiffutherm plus render) - Dimension “A” = 90mm
WEC721/110 To suit 90mm System depth (80mmDiffutherm plus render) - Dimension “A” = 110mm
WEC721/130 To suit 110mm System depth (100mmDiffutherm plus render) - Dimension “A” = 130mm
WEC751/65 To suit 70mm System depth (60mmDiffutherm plus render) - Dimension “A” = 65mm
Range of preformed oversill to create / protect sillarea when using Diffutherm system.
Other sizes, colours end caps and joint piecesavailable to order.
The WE76 and WE77 profile are customer made tothe customers requirements in 1.2mm, 1.5mm,2.0mm or 3.0mm thick Aluminium - powder coatedto customers specification.
All relevant dimensions (A,C and E) to specified bycustomer ensuring dimension ‘A’ is sufficient to‘oversail’ by a minimum of 20mm.
Length is measured reveal to reveal + 100mm.
Oversills
WEC721
Type
WEC751
Type
WE76
WE77
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Components & Accessories
Diffutherm InsulationDiffutherm Insulation
Example based on WE76 Type sill.
Relevent dimensions (A, C & E)
are taken on site ensuring
dimension ‘A’ is sufficient to
‘oversail’ surface finish by a
minimum of 30mm as shown.
30
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Fixings for Timber
Diffutherm InsulationDiffutherm Insulation
Board fixings for Timber substrates
Termofix 6H, screw fix, suitable for: wood and chipboard.
Advantages
�
�
�
�
�
Ready assembled
Low k-value
Slim shaft avoids stress in reinforcing grid
Flexible head for stress compensation
Highly corrosion-resistant screw
Description
The FISCHER Termofix 6H is a ready-assembled screw fixing for fastening Diffutherm to timber substrates.
The screw is protected against corrosion. The flexible head of the Termofix 6H compensates for changes
in length caused by variations in warmth in the render façade, thereby reducing the formation of cracks.
The air column which is created between the countersunk screw and the plug, ensures perfect insulation.
This gives the Termofix 6H its extremely low k-value. Heat loss through conduction is therefore substantially
reduced.
h dv a
l
Material Min Anchor Fixing Max Fastening
Thickness (mm) Type Part No: Depth Hv (mm) Length l (mm) Thickness
6H/60 07360 25 60 35
40 6H/80 07361 25 80 55
60 6H/100 07362 25 100 75
80 6H/120 07363 25 120 95
100 6H/140 07364 25 140 115
20
D i f f u t h e r mW o o d f i b r e
“The Science of Nature - The Future of Construction”“The Science of Nature - The Future of Construction”
External Wall Insulation Systemfor Masonry Substrates
De
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Internal Finish Plaster with NBT
Breathable Emulsion Paint
Masonry Substrate
8mm Baumit-Bayosan
External Mineral
Render System
Pavatex Diffutherm
Woodfibre Insulation
System
Inside Outside
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1.05 Openings and Abutments
1.06 Render System
:
At all openings, service penetrations and free
edges, seal the board to the structure using
Compriband VSA No: CC0125015600 to
create an air and weather-tight joint.
:
Above Plinth Area :
Apply ….mm APU rails to all door and window
frames to form a weather-tight joint.
Apply diagonal strips of mesh reinforcement
across the corners of all openings and
continuous strips of mesh reinforcement
above the base rail and along all free board
edges (as NBT recommendations) into 2mm
of MC55W mortar.
Apply MC55W mortar to all corners and
reveals and set fibreglass mesh beads
……………. plumbed and aligned to a
render depth of 5 8mm.
Hand or machine apply MC55W over the
board surface and straighten out. Comb with
a tooth trowel to an overall depth of 4 6mm
then place sheets of fibreglass mesh lightly
onto the render (min 100mm laps).
Apply a further 2 - 3mm coat of MC55W and
smooth out. On hardening, scrape back the
surface with the edge of a trowel.
Apply …………….. decorative finish coat
after 6 days.
Apply …………….. Equalising paint after 6
days.
Specification for Diffutherm EWI
system onto masonry
1.0 General
1.01 Access
1.02
1.03 Board System
1.04 Fixing Boards
:
The system comprises Pavatex Diffutherm boards and
Bayosan thin mesh coat renders supplied together with
all accessories by NBT
:
Scaffolding and access to the work must be
carried out in accordance with current CDM
and Health and Safety Regulations
:
Below dpc and in the plinth area (< 150mm
above finished ground level) use EPS plinth
boards; above the plinth area use Pavatex
Diffutherm boards.
:
Above Plinth Area :
Fix the base rail ……above dpc, packed to a
true line and level, using 2 No. ….. fixing per
linear Metre.
Adverse Weather / Storage :
Application of the system must only take place
in suitable weather conditions in accordance
with NBT recommendations and good
rendering practice, protecting the works if
necessary. Do not apply the Diffutherm System
in ambient temperatures below 5º C. Boards
should be rendered within 2 months. Boards
should be stored flat and dry. Edges should be
protected to prevent damage to tongue.
Locate the 1 course of Diffutherm boards tightly in the
base rail channel with grooved side down and edge t &
g joints fully engaged. Substrate should be sound, clean
and even. Surface deviations should be leveled out
using a compatible regularizing mortar.
Fix through the boards into the substrate using 9 No.
…………. fixings per board
Install 2 course in ½ bond pattern with minimum
overlap 200mm, over-lapping board ends at vertical
corners, ensuring all board joints are fully engaged and
tightly joined. Fix to studs as for 1 course. Fill any gaps
and areas of damaged boards with loose Woodfibres
and apply a “patch” of reinforcing mesh at least
200mm larger than area of damage/repair. (See 1.06 -
Render System.)
st
nd
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Diffutherm InsulationDiffutherm Insulation
Specification.EWI onto Masonry
Internal Finish Plaster
with NBT Breathable
Emulsion Paint
Masonry Substrate
8mm Baumit-
Bayosan External
Mineral Render
System
Pavatex
Diffutherm
Woodfibre
Insulation
System
Inside Outside
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Boards and Renders
Do not use Diffutherm boards below DPC level. Use
boards suitable for wet exposure (EPS, XPS) in the
plinth area (ie. within 0.15m of Ground Level). Refer to
Detail 4.
For air and wind-tightness seal the boards against the
structure at all joints, intersections, openings and
penetrations and along all edges using Compriband
strip.
For weather-tightness, seal the render around all
openings using the appropriate APU strips (Details 2, 3
and 5).
Light coloured finishes (light intensity > 40%) and
coarse-grained finishes (2-5mm grain sizes) are
preferred for long-term durability and appearance.
Cracking of the render system cannot be completely
avoided. Minor cracking is not detrimental to the
system and the board will not deteriorate if the cracks
are small and repaired quickly.
Apply equalisation paint to the finish render coat to
avoid discolouration from uneven drying.
To select paints for applying to the finished surface
without significantly reduction of the vapour
permeability of the Diffutherm System, refer to NBT.
General
The Diffutherm System is certified for use in rain
Exposure Zones 1, 2 and 3 (described in BS 8104 and
the BRE report “Thermal Insulation, avoiding risks”).
If intended for use in Exposure Zone 4, contact NBT
for advice.
The Diffutherm System is certified for use in buildings
where the height to the top floor is < 8m.
If intended for use in higher buildings, contact NBT for
advice.
The Diffutherm System must be designed so that no
loads from the structure are carried by the boards or
render.
Design a positive strategy for avoiding rain
penetration of the EWI system. This will include :
generous overhangs for roofs, cills and copings (in no
case < 30mm) drip details on all overhangs
careful detailing of flashings at critical areas eg.
balconies, decks, walkways, parapets, copings,
service penetrations, roof abutments, intersecting
and adjoining buildings, etc.
window and door frames set back from the external
face of the wall by at least the thickness of the
insulation boards.
Carefully detail the Diffutherm layer for wind-
tightness at all openings and in the plinth area.
Movement joints in the substrate must be
incorporated into the Diffutherm EWI System.
Consider movement joints for walls longer than 18m.
Only lightweight fittings can be attached directly to
the Diffutherm boards. Carefully plan the location of
down-pipes, lights, security systems etc. and attach
using fixing disks screwed directly to the structure.
Contact NBT for further advice on fixings.
Provide the Contractor with full and complete details
for all critical areas of the system including those
listed above leave nothing 'to be agreed on site'
The system can only be guaranteed if only the
boards, mortars, renders and accessories approved
by NBT are used.
Diffutherm InsulationDiffutherm Insulation
Key Considerations for DesignersEWI onto Masonry
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Renders
Do not apply the render system onto rain-soaked
boards or when the air temperature is below 5C and
avoid working in strong, direct sunlight.
The reinforcing mesh sheets should lie in the outer 1/3
of the basecoat layer and sheets should overlap by
at least 100mm.
Additional mesh reinforcement is required around all
openings, along all corners and edges, across zones
where suspended floors intersect walls and where
boards are applied over different substrates, along
continuous straight board joints and over repaired
areas.
Seal the render around all openings using the
appropriate APU strips (Details 2, 3 and 5).
Allow 1 day/mm thickness drying time for the
basecoat before applying the topcoat.
Apply equalisation paint to the finish render coat to
avoid discolouration from uneven drying.
Cracking of the render system cannot be completely
avoided. Minor cracking is not detrimental to the
system and the board will not deteriorate if the cracks
are small and repaired quickly.
General
The Diffutherm System must only be installed by
approved contractors who have been trained by NBT.
The details and specifications in this guide and from
the Designer should be followed as the basis of a
successful installation.
The system can be guaranteed only if the boards,
mortars, renders and accessories approved by NBT
are used in the proper specified manner.
Masonry substrates must be sound, compatible with
the bonding mortar and mechanical anchors, flat
(dubbed out if necessary to avoid excessive thickness
of the meshed render), free of loose material and
problems associated with damp or structural
movement.
Movement joints in the substrate must be
incorporated into the Diffutherm System.
Only lightweight fittings can be attached directly to
the Diffutherm boards. Carefully plan the location of
down-pipes, lights, security systems etc. and attach
using fixing disks screwed directly to the structure.
Contact NBT for further advice on fixings.
Boards
Plan board layout to reduce wastage prior to
commencing installation.
A base rail must be used to start the system. (Detail 4)
Minimum bond overlap is 200mm between courses.
Boards must not be wet or damaged and board
edges must be tightly butted together.
Tightly pack all gaps between boards with woodfibre.
Seal the boards against the structure around all
openings and penetrations and along all edges
using Compriband strip.
Do not use the Diffutherm EWI system below the DPC
level. (Detail 4)
Use appropriate boards (EPS, XPS) in the plinth area
(ie. within 0.15m above Ground Level) (Detail 4)
Do not allow the boards to stand exposed to weather
for more than 60 days after fixing before applying
the render system.
Diffutherm InsulationDiffutherm Insulation
Key Considerations for InstallersEWI onto Masonry
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Installation Procedure
The substrate should be dry, clean and flat. Do not apply the Diffutherm System in ambient temperatures below 5 C°
Base Rail
Above Plinth Area :
Fix the base rail and corner rail above DPC to each
stud packed to true line and level, using 1 fixing per
stud. Rail connector clips should be fitted at all rail
joints.
Attach clip on drip profile to entire run of base and
corner rail.
Diffutherm InsulationDiffutherm Insulation
Installation Procedure (1)EWI onto Masonry
Compri-band
Where boards butt up to other substrates a Compri-
band sealing strip should be inserted to allow for
differential movement and provide a weather tight
seal. Such areas include window and door frames, sills,
eaves and soffit boards.
1 Compriband
2 Diffutherm
3 Meshbead4 MC55W / mesh5 Finish render6 Reveal board7 APU rail8 Fixing
1 Diffutherm board
2 MC 55W render
3 Mesh
4 Decorative finish
5 Studs
6 Mesh bead
7 Base rail
8 Fixings
9 Inner sheating
10 Insulation material
Diffutherm Boards
Locate the 1 course of Diffutherm boards tightly in the base rail channel with grooved side down and edge t & g joints
fully engaged. Fix through the boards into the studs using 3 fixing / board / stud. Boards must span at least 2 studs. Board
edges need not coincide with stud positions, which should be at < 600mm centres. The faces of the boards should be
flush. Stagger fixings where board edges coincide with a stud position.
Install 2 course in ½ bond pattern, over-lapping board ends at vertical corners, ensuring all board joints are fully
engaged and tightly packed. Fix to studs as for 1 course.
st
nd
st
Apu rails
Apply Apu rails to door and window frames to form a
wind and waterproof expansion joint. The Apu rail has
a sticky foam backing which adheres to the frame.
This prevents thermal bridging. A stiff protection strip
with a sticky surface allows enables polythene or
paper to be attached to protect the window or door.
This strip is peeled away on completion of rendering
leaving a clean neat finish.
1 Foamed backing
2 Protection strip
3 APU rail
4 Mesh
5 Substrate
6 MC55W
7 Finish render
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Installation Procedure
Additional Meshing
Trowel 2mm of MC55W diagonally onto the corner
faces of all openings and smooth in strips of mesh
(25x50mm).
Trowel MC55W onto all corners and reveals and set
fibreglass mesh beads into the mortar, plumb and in
alignment, to a render depth of 5-8mm.
Diffutherm InsulationDiffutherm Insulation
Installation Procedure (2)EWI onto Masonry
Render System
Trowel or machine-apply MC55W over the boards and straighten out the render. Using a tooth trowel comb through
the render to ensure an overall render depth of 4-6mm.
Place sheets of fibreglass mesh lightly onto the render, with overlaps not less than 100mm.
On stiffening apply another coat of MC55W 2-3mm thick and smooth out. On hardening rough up the surface using
the edge of a trowel.
After six days apply a decorative finish coat
or
Oversills
Oversills should be fitted using one of the options
shown above prior to rendering. Apply a Compr-
band between the lower face of the sill and the
upper edge of the Diffutherm to form a weather tight
seal.
A minimum overhang distance of 30mm from front
of sill to render face should be maintained at all
times.
Face
Fix
Side
Fix
1 Compriband
2 Sill
3 Substrate
4 Diffutherm
5 MC55W / mesh
6 Finish render
30
mm
Movement Beads
Where structural movement
joints or changes in substrate
occur a movement bead
should be incorporated into
the Diffutherm system to
prevent cracking due to
differential movement.
Reveals
Fully paste the rear side of the reveal boards using
MC55W and trowel through using a tooth trowel.
Apply a compri-band along the edge of the board
and place the board tightly up against the window or
door frame.
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Key to Details
Diffutherm InsulationDiffutherm Insulation
Design & Installation DetailsEWI onto Masonry
1
1
2 3
23
4
5
67
1 System Components
2 Verge Detail
3 Eaves Detail
4 Plinth Detail
5 Sill Detail
6 Additional Meshing
7 Board Pattern
1 Diffutherm Insulation Board
2 Bayosan MC55W Render
3 Bayosan AG01 Mesh
4 Bayosan Decorative Finish*
5 Masonry Substrate
6 Wemico Mesh Corner Bead
7 Wemico Base Rail
8 Fisher Termofix S8 Fixing
(Termoz10P for Masonry)
*Can be further decorated with the Beecks
range of mineral finishes.
Compriband VSA
Compriband VSA
Regularizing Mortar
Regularizing Mortar
Baumit - Bayosan
Decor Finish
Baumit - Bayosan
Decor Finish
Pavatex Diffutherm
Woodfibre Board
Pavatex Diffutherm
Woodfibre Board
Baumit - Bayosan
MC55W Base Render
(Fully Meshed) Baumit - Bayosan
MC55W Base Render
(Fully Meshed)
Natural Building Technologies LtdThe Hangar Worminghall Road Oakley Bucks HP18 9ULTel: +44 (0)1844 338338 Fax: +44(0)1844 338525email: [email protected] web: www.natural-building.co.uk
Diffutherm InsulationDiffutherm Insulation
Design & Installation DetailsEWI onto Masonry
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Plinth Detail A
Pavatex Diffutherm
Woodfibre Board
Baumit-Bayosan
MC55W (Fully Meshed)
Baumit-Bayosan
Decor Finish &
Equalisation Paint
4aFacade
French Drain
Plinth Area:
150above
Finished
Ground LevelCompriband VSA
Baumit-Bayosan
Equalisation Paint or Silicate Paint
Baumit-Bayosan
Hm50 (fully meshed & rubbed up as finish)
Baumit-Bayosan
Hm50 (fully meshed)
Bitumen Impregnated Protection Board
Plinth Board
Baumit-Bayosan
Equalisation Paint
Base Rail / Starter Track
Regularizing Mortar
(If Required)
Baumit-Bayosan
Decor Finish
Plinth Area:
150above
Finished
Ground Level
Facade Area
Plinth Board
French Drain
Plinth Detail B
Bitumen Impregnated
Protection Board
Pavatex Diffutherm
Woodfibre Board
Baumit-Bayosan
MC55W (Fully Meshed)
Baumit-Bayosan
Decor Finish &
Equalisation Paint
Baumit-Bayosan
Hm50 (fully meshed
& rubbed up as
finish)
4b
Regularizing Mortar
(If Required)
Compriband VSA
Natural Building Technologies LtdThe Hangar Worminghall Road Oakley Bucks HP18 9ULTel: +44 (0)1844 338338 Fax: +44(0)1844 338525email: [email protected] web: www.natural-building.co.uk
Diffutherm InsulationDiffutherm Insulation
Design & Installation DetailsEWI onto Masonry
Set out Diffutherm Boards so that board edges
DO NOT coincide with the corners of wall
openings.
Always ensure that the vertical joints are
staggered by at least 200mm between
courses and that each board is supported on
at least 2 studs.
Board joints DO NOT have to terminate on a
stud due to the tongue groove board edge.
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5
7 Compriband Strip
8 APU Rail
9 Render Finish
10 Bedding Mortar
11 Sill Profile
12 Door / Window Frame
1
1
1
22
2
3
3
4
4
4
5
5 6
6
7
7
7
78
8
9
9
9
10
10
11
11
12
1212
1 Substrate
2 Diffutherm Board
3 Reveal Board
4 Reinforcing Mesh
5 Mesh Corner Bead
6 Fixing
ZO NES REQUIRING ADDITIO NAL
M ESH REINFORCEM ENT
1 Diagonal Strip 250mm x 500
Mesh Corner Beads2
Mesh Strip 150m m wide3
2
22
22
2
11
1
3
3
3
2
To reduce the risk of the render cracking, additional mesh reinforcement
is required along all exposed board edges and around all openings.
Bed the mesh in M C55W m ortar and then apply the main meshed render
layer, overlapping w ith the edge strips by at least 100mm.
In the diagram additional mesh is shown across the corners of w indow
and door openings (1), along all reveals and corners (2), over the starter
track and below window sills (3).
An additional band of mesh should be applied across the zone where
suspended floor joists bear onto the timber fram e walls.
66
1 Diagonal Strip 250mm x 500mm
2 Mesh Corner Beads
3 Mesh Strips 150mm Wide
4 Mesh strip 500 wide at Floor Level
4
(4)
55
Natural Building Technologies LtdThe Hangar Worminghall Road Oakley Bucks HP18 9ULTel: +44 (0)1844 338338 Fax: +44(0)1844 338525email: [email protected] web: www.natural-building.co.uk
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Components & Accessories
Diffutherm onto Masonry
1 Pavatex Diffutherm Insulation Board
2 Bayosan MC55W or RK70N Render
3 Bayosan AG01 Reinforcing Mesh
4 Bayosan Decorative Finish *
5 Timber or Metal Stud Substrate
6 Wemico Mesh Corner Bead
7 Wemico Base Rail & Clip on Profile
8 Fischer Termofix S8 range of fixings for Masonry
* Can be further decorated with the Beecks range of mineral finishes
Diffutherm InsulationDiffutherm Insulation
Base Rail.
Clip on Profile.
Mounting Set. (optional)
2.5m Length Base rail for 60mm Diffutherm:Stainless Steel No: 2146 Aluminium No: 9146
2.5m Length Base rail for 80mm Diffutherm:Stainless Steel No: 2148 Aluminium No: 9148
2.5m Length Base rail for 100mm Diffutherm:Stainless Steel No: 2150 Aluminium No: 9150
Used to support first row of Diffutherm boards(Must be set above DPC level).
2.5m Length Clip on Profile for 6mm Thick Render:Stainless Steel No: 2134 Aluminium No: 9121
2.5m Length Clip on Profile for 10mm Thick Render:Stainless Steel No: 2130 Aluminium No: 9124
Clip on drip profile for attaching to Base Rail.
Base rail mounting set containing the following:75 x Fixings 50 x 3mm Packers/Spacers and 10 x40mm Rail Connectors Pack No: 3757
Set of mounting components for base rail
Base Rail
Clip on
Profiles
Fixing
Spacer
Rail Connector
Board
Thickness
+3mm
Wemico Components conform to the following standards:Stainless Steel Products: BS 1449/2: 1983 EN10088/2: 1995 (stainless steel 304Grade) Aluminium Products: EN485/4: 1994
Natural Building Technologies LtdThe Hangar Worminghall Road Oakley Bucks HP18 9ULTel: +44 (0)1844 338338 Fax: +44(0)1844 338525email: [email protected] web: www.natural-building.co.uk
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Diffutherm InsulationDiffutherm Insulation
Corner Rail
Render Stop
Wall Coping
Movement Beads
73cm Length Corner rail for 60mm Diffutherm:Stainless Steel No: 2416 Aluminium No: 9286
Stainless Steel No: 2418 Aluminium No: 928873cm Length Corner rail for 80mm Diffutherm:
73cm Length Corner rail for 100mm Diffutherm:Stainless Steel No: 2420 Aluminium No: 9290
Precut section of base rail for forming corners.
2.5m Length Render Stop for 60mm Diffutherm:Stainless Steel No: N/A Aluminium No: 9156
2.5m Length Render Stop for 80mm Diffutherm:Stainless Steel No: N/A Aluminium No: 9158
2.5m Length Render Stop for 100mm Diffutherm:Stainless Steel No: N/A Aluminium No: 9160
Box shaped render stop bead for edge protection ofDiffutherm boards on vertical terminations.
2.5m Length WEC731 & WEC741 Type Coping forvarious overall system widths - please enquire
3m Length 2320 Stainless Steel Movement Bead for8mm Thick Render (Vertical Applications only).
3m Length 2332 Stainless Steel Movement Bead for8mm Thick Render (Vertical Applications only).
Movement / Expansion joint beads for creatingvertical expansion joints along wall line or at internalcorner joints.
Corner Rail
Render Stop
Movement Beads
2320 2332
Board
Thickness
+3mm
WEC731 TYPE WEC741 TYPE
Natural Building Technologies LtdThe Hangar Worminghall Road Oakley Bucks HP18 9ULTel: +44 (0)1844 338338 Fax: +44(0)1844 338525email: [email protected] web: www.natural-building.co.uk
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Components & Accessories
Diffutherm InsulationDiffutherm Insulation
Corner Beads
APU Rail
Sealing Band
2.5m Length Corner Bead with fibre glass meshattached for External CornersPVC No: 3707 Stainless Steel No: 2031
For embedding in the render for forming edges onexternal corners.
2.6m Length APU Sealing Rail.PVC No: 3276
Used for a watertight seal to window and doorframes. Self-adhesive stip is removed then APU railis stuck to window / door frame. Self- adhesive bandcan be removed to enable a protective sheet to beapplied to cover door and windows - this is thendiscarded by breaking away the removableprotection strip.
Size 4 No: Cc0125015600
Bitumen impregnated movement seal for abutmentsto window and door frames to ensure watertightexpandable seal between render and APU rail(See www.compriband.co.uk for further details.)
6m Length Compriband VSA Sealing Strip
Corner Beads
APU RailRemovable
Protection
Strip
Self-Adhesive
Band
3707
3726
2031
Self-Adhesive
Strip
Natural Building Technologies LtdThe Hangar Worminghall Road Oakley Bucks HP18 9ULTel: +44 (0)1844 338338 Fax: +44(0)1844 338525email: [email protected] web: www.natural-building.co.uk
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Diffutherm InsulationDiffutherm Insulation
Oversills - Standard Profiles
Oversills - Special Profiles
2.5m Lengths of white coated 1.2mm Aluminiumoversill profile. (WEC721 and WEC751 only)available in the following sizes:
WEC721/70 To suit 70mm System depth (60mmDiffutherm plus render) - Dimension “A” = 90mm
WEC721/110 To suit 90mm System depth (80mmDiffutherm plus render) - Dimension “A” = 110mm
WEC721/130 To suit 110mm System depth (100mmDiffutherm plus render) - Dimension “A” = 130mm
WEC751/65 To suit 70mm System depth (60mmDiffutherm plus render) - Dimension “A” = 65mm
Range of preformed oversill to create / protect sillarea when using Diffutherm system.
Other sizes, colours end caps and joint piecesavailable to order.
The WE76 and WE77 profile are customer made tothe customers requirements in 1.2mm, 1.5mm,2.0mm or 3.0mm thick Aluminium - powder coatedto customers specification.
All relevant dimensions (A,C and E) to specified bycustomer ensuring dimension ‘A’ is sufficient to‘oversail’ by a minimum of 20mm.
Length is measured reveal to reveal + 100mm.
Oversills
WEC721
Type
WEC751
Type
WE76
WE77
Natural Building Technologies LtdThe Hangar Worminghall Road Oakley Bucks HP18 9ULTel: +44 (0)1844 338338 Fax: +44(0)1844 338525email: [email protected] web: www.natural-building.co.uk
Diffu
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Components & Accessories
Diffutherm InsulationDiffutherm Insulation
Example based on WE76 Type sill.
Natural Building Technologies LtdThe Hangar Worminghall Road Oakley Bucks HP18 9ULTel: +44 (0)1844 338338 Fax: +44(0)1844 338525email: [email protected] web: www.natural-building.co.uk
Diffu
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f or
Maso
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Diffutherm InsulationDiffutherm Insulation
Board fixings for Masonry
Termofix hammerset fixing for Masonry
Advantages
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Ready assembled
Low k-value
Slim shaft avoids stress in reinforcing grid
Flexible head for stress compensation
Impact block prevents premature expansion
Description
TThe fischer Termofix fixing is a ready-assembled hammerset fixing for fastening Diffutherm insulation systems
to masonry backgrounds. The flexible head compensates for any change in length caused by heat in the
plaster façade. This reduces the formation of cracks caused by stresses in the façade. The slim shaft prevents
crushing of the reinforcing grid, which remains in its original position in the plaster.
The special plug countersinks the nail into the shaft when it is knocked into position. This makes the
conduction of heat virtually impossible, thereby achieving a low k-value. The impact lock prevents premature
expansion of the fixing when it is knocked in.
h dv a
l
Material Min Anchor Fixing Max Fastening
Thickness (mm) Type Part No: Depth Hv (mm) Length l (mm) Thickness
60 CF8/095 92458 45 95 60
80 CF8/115 92459 45 115 80
100 CF8/135 92461 45 135 100
MATERIAL SAFETY DATA SHEETAccording to EEC 91/155 EWG
DateRevisionPageQS-Ref.
29.01.04Version 11 von 5110-505-e
Trade name and synonyms : Diffutherm
1. Identification of Substance and Company
Description of product : Wood fibrous insulating boards for the buildingindustry
Manufacturer / Supplier : Pavatex Fribourg S.A.Route de la Pisciculture 37CH 1701 Fribourg
Emergency phone : +41 (0) 26.426.31.11
2. Information on Ingredients
Ingredients : Contents in % wt
Swiss Conifer 95.8Paraffin 0.7PVAc 3.5
3. Hazards Identification
Health : This product involves no particular risks. Applythe same safety measures against dust as whenprocessing wood.
Environment : This product is combustible as wood.
4. First Aid Measures
General information : no special risksInhalation : --Skin contact : --Eye contact : --Ingestion : --
MATERIAL SAFETY DATA SHEETAccording to EEC 91/155 EWG
DateRevisionPageQS-Ref.
29.01.04Version 12 von 5110-505-e
Trade name and synonyms : Diffutherm
5. Fire-Fighting Measures
Suitable extinguishing media : water, CO2
Not recommended extinguishingmedia : --Special fire fighting procedures : --Special protective equipment : --Unusual fire & explosion hazards : noneHazardous combustion products : none known
6. Accidental release measures
Personal protective measures : not necessaryEnvironmental measures : not necessarySpill clean-up methods : not applicable
7. Handling and Storage
Usage precautions : --Storage precautions : keep in a dry place, store flat
8. Exposure Controls / Personal Protection
long time exposure short time exposure(8 hours) (10 minutes)
Ventilation : none noneProtective equipment : not necessary not necessaryRespirators : not necessary not necessaryProtective gloves : not necessary not necessaryEye protection : not necessary not necessaryOther protection : -- --
MATERIAL SAFETY DATA SHEETAccording to EEC 91/155 EWG
DateRevisionPageQS-Ref.
29.01.04Version 13 von 5110-505-e
Trade name and synonyms : Diffutherm
9. Physical and Chemical Properties
Appearance / colour : porous boardOdour : --pH-value : ≈ 7.0Boiling range : not applicableFlash point : not applicableFlammability : not applicableAuto-ignition temperature : not applicableExplosive properties : not applicableOxidising properties : combustibleDensity (20°C) : 190 – 210 kg/m3
Solid contents (30’180°C) : < 8 % (humidity content)Solubility in water : not solubleSolubility in oil / solvent : not soluble
10. Stability and Reactivity
Stability : no decompositionConditions to avoid : none knownMaterials to avoid : none knownHazardous combustion products : none knownAdditional information : --
11. Toxicological Information
Toxicity Dose LD50 : not investigatedEye contact : possible temporary irritation (mechanical)
Skin contact : possible temporary irritation (mechanical)
After inhalation: possible temporary irritation (mechanical)
After ingestion : no available information
MATERIAL SAFETY DATA SHEETAccording to EEC 91/155 EWG
DateRevisionPageQS-Ref.
29.01.04Version 14 von 5110-505-e
Trade name and synonyms : Diffutherm
12. Ecological Information
Degrability : this product is to be seen as non hazardousAcute fish toxicity : --Water hazard classification : --
13. Disposal Information
Disposal number solidified : not applicableIncineration : possibleRecycling : possible
14. Transport Information no special precautions required
Class / division : --UN-number : --Package number : --Additional information : --
Overland transportADR / RID class: --GGVE / GGVS : --Transport document : --Additional information : --
Sea freightEMS-number : --IMO / IMDG Code: --Transport document : --Additional information: --
Air cargoIATA / ICAO / DGR : --Additional information: --
MATERIAL SAFETY DATA SHEETAccording to EEC 91/155 EWG
DateRevisionPageQS-Ref.
29.01.04Version 15 von 5110-505-e
Trade name and synonyms : Diffutherm
15. Regulatory Information
Label for supply : no distinguishing marks requiredEEC-number : --Symbols : --Risk-phrases : --Safety-phrases : --
16. Additional Information
The information contained herein is based upon data considered to be accurate.However, no warranty is expressed or implied regarding the accuracy of these data, theresults to be obtained from the use thereof, or that any such use will not infringe anypatent. This information is furnished as a guide only and upon the condition that personreceiving it shall make tests to determine the accuracy and suitability for his or her ownpurpose.
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