fRSI

EIFS

LTBs &

retrofitENERGY ANALYSIS

4

Solid concrete wall improved to0.103W/m2K using ‘KINGSPAN KOOLTHERM K5’ External insulationEPS (A+ rating from BRE Green Guide)

New walls to extensions: ‘KingspanTEK Panel System’, 15mm OSB sheathing 142mm Kingspan EPS rigid insulation(Rating A+ BRE Green Guide) insulatedand vapour checked internally KOOLTHERM insulated plasterboardExterior, ‘Kingspan Nilvent’ non-tentingwind barrier membrane, 50mm externalair layer, vertical battens with plywoodmesh and acrylic render �nishThe plywood sheathing to the exteriorprovides structural stability to theTEK panel extension

New walls to extensions: ‘KingspanTEK Panel System’, 15mm OSB enclosing142mm Kingspan KOOLTHERM EPS rigid insulation(Rating A+ BRE Green Guide) insulatedand vapour-checked internally KOOLTHERM insulated plasterboardExterior, ‘Kingspan Nilvent’ non-tentingwind barrier membrane, 50mm externalair layer, vertical battens with plywood, render�nish

To achieve low air in�ltration within original house, all joints, cracks, breaches, skirtings, window opestaped. All services and �xings through air-tight gromits �xed in place

Y factor....

.055W/m2K

U

Original concrete �oorperimeter reduced torear door, house 2. LTBheat loss will spike at thispoint of access

Party wall (Left)

Some ltbs require3D modelling toexamine how theheat travels acrossd�eresnt planes

Challenging conventions:Avoiding over designby engineering orbuilding habits - calculations for actual size required forraft or strip foundations

New Munster Joinery ‘PASSIVALU-clad’ range ).7W/m2K andmoved to new location toat edge of new insulation

House 2 & 5 performedbest at baseline and retro�t DEAPbut performed lesswith abutting partywalls (no insulationadjoining assumed)

*The end of terracecould realistically becomethe best performing housegiven it’s exposure on1 side only

Each element was modelled in BuildDesk and a hygrothermalappraisel carried out. Any building made air-tight is at highrisk of condensation and mould if moisture cannot be released. In the opposite way of stopping air escaping, moisture from the internal environment must also get to evaporate.

Employing air tight elements (Kingspan TEK panels for the structure)have an internal insulation vapour check plasterboard (KOOLTHERM)The Glaser report sample below refers to highest risk of moistureand oscillating damp in a buildiong - winter months.

Plan EIFS boundary and adjoiningproperties givebadly performing junctions

Primary Energy Bills are reduced from 411 kW|hrm2 to 44 kW|hrm2

which is a reduction of almost

savings to each home

LTB

Surface temperaturesare calculated toassess risk mould and surface condensation internallyFor dwellings, the value of fRsi should be no less or equal to 0.75, For three-dimensional corners of ground �oors this value may be reduced to 0.70, for all points within 10 mm of the point of lowest fRsi. Criticalareas are where furniture is pushed up against the wall and there is little movement of air

JENNY POWER D14123981 PROJECT 4 SUBMISSION 24 | 04| 15 DT774

90%

RETR

OFIT

DEVOLUTION

1 ac|hr (Old 4.65)

New extensions byTEK system reduce Psito negligible levelsdue to tight connection

FUTURE HOMES

2d DETAILS

Schuco balconyextension systemwith glass sepatatingwalls per dwelling

The balcony is boltedonto the new extensionat roof level avoidingall bridges and addingto external living space

TEK Panel system toextension walls reducePsi values (heat loss at junctions)to negligible levels withtight connection detailsat heads and sole platesWith each section ofpanelling, air tightness isachieved. The TEK system wall panel provides 0.19 W/m2Kbefore 90mm ’Kooltherm’ insulation was applied internally with 10mm Kooltherm plasterboard

Each dwelling producesminimum 1000 kW/hrs

free solar electrical powerper year

Increased living spacewithin existing footprint

A+ Rated insulationto walls and roofspaces

(Kooltherm) within

Corbel cut back &Aerogel slip

at eaves

New windows re-located to outer skin

Existing sill cutback and externallyinsulated and resin

pressed metal sill �tted over

Kingspan TEK panelsystem to walls

and roofs

New insulated �oorwith perimeter

insulation greatly reducesheat escape from

�oor junctions

Original �oor retainedand insulated withKingspan Optim-RVacuum Insulation

Panels, glued to concretecovered

A VIP is material that is used for heat preservation. It is made of a type of core �lling material and vacuum protection surface layer compound. It can e�ectively avoid air convection caused by heat transfer. Therefore, coe�cient §of thermal conductivity can be greatly reduced. Lack of movement is critical and the VIP is glued to the receiving surface. This glue is applied by Roller Coating Method and is coated on the whole surface of VIP.

NOT FOR DETAIL: REPRESENTATIONAL ONLY

SUSTAINABILITY DECISIONS CAN BE MADE AT DESIGN STAGE

THERM THRESHOLD SHOWING EXISTING FOUNDNEW GROUND FLOOR | SILL NEW GROUND FLOOR | WALL

The original corbel created a large linear heat loss location so it was cut back to allow the EIFS to continue uninterrupt-ed around to the roof to meet the internal insulation bridged by aerogel at the junction. This avoided the roof being raised

Heat loss junctions along linear lengths (Linear Thermal Bridges) take account of vulnerable areas beyond �anking planar heatloss areasThey are calculated using modelling programmesusing heat �ow resistancesof di�erent build ups

If the junctions don’t work-back to board

BREEAM OUTSTANDING

Worst Months

DEAPEnd of Terrace:411 kWhrm2 | F BER - 44 kWhrm2 A2 BERMid Terrace

314 kWhrm2 | E1 BER - 42 kWhrm2 A2 BERMid Terrace Bay

304 kWhrm2 | E1 BER - 44 kWhrm2 A2 BER

FABRIC|STUDY

Design Strategies:

Maintain existing �oor and insulate by installingVacuum Insulation Panels on original slab

Additional protection and living space is providedby new extensions to front and rear

The external facade is insulated to U beyond regulationThe roof space is insulated to U beyond regulation

Additional living space is provided within theexisting building envelope to add to the residents’ spatial enjoyment

SIPS

Air tightness strategy

Wind tightness strategy

VIPS

The gable end of terrace performed best in the calculation given it’s reduced party wall exposure. This could further be improved with greater insulation on the adjoining properties’ attic spaces.

GROUND FLOOR LAYOUTS FIRST FLOOR LAYOUTS

MOORDEBREWOHSMOORDEB

LIVING DINING

HOME OFFICE

YGE

OMET

RY

Best Months

Kitchen

Bedroom

Shower

Bedroom

Hall

Y-FACTOR INPUT

RE-USE OF EXISTING SERVICES

The cottages comprise solid concrete wallswhich provide low air in�ltration rates (4.65ach|r )but high conductivity and so require highlevels heat for spatial comfort. The roof was insulated with 100mm rockwool. The �oor was 75mm solid concrete

Baseline Change:

Walls OldW/m2KSolid concrete 251mm 2.47 Floors .75Roof 3.91

NewW/m2K.103

U-VALUE

.134

.084

Living

New roof|walls to extensions: ‘KingspanTEK Panel System, 15mm OSB sheathing

142mm Kingspan EPS rigid insulation(Rating A+ BRE Green Guide)

ANALYSIS TOOLS & CALCULATIONS

RETROFIT PROCESSES | STAGES

BUILD DESK | THERM | GLASER

BUILD DESK

KINGSPAN TEK Panellingsystem provides Psivalues for all cruticaljunctions: Ground �oor junctions with a U value = 0.15 W/m2K (used in the KINGSPAN calculation)Jamb, head and sillThese values were takenand also modelled hereby us to con�rmAll other junctions modelledas per constructionACD sill could be used forthe existing �rst �oor sill

Kingspan have increased their thermalperformance by internally insulating their SIPS system using insulated plasterboard bonded directly onto the panel. Theis plasterboard has a vapour check so it will not grow mould from internal moisture. Kingspan allow for services (sockets and cables) to be chased into the SIPS side of the plasterboard to mimimise heat loss.In this situation. given the size of the extension, recommendations would be no services to be �tted on any external wall

Bathroom

The existing boiler is not long installedin the house and has a mid range value in the BREEAM assessment. There should be some savings using good services that comply when assessing the amount of work to be carried out on a retro�t

Air-tight Strategies:New insulated plasterboardtaped at junctions with originalplaster on walls

VENTILATION

Ventilation and air-tightness go hand in hand. Without ventingthe interior, the indoor air qualitystagnates and there will be mouldand condensation.The AERECO V4A Premium is a whole house centralised MechanicallyVentilated system, ducted around the house and routed back to a singleunit located usually in loft spaces

Existing wall

Internal party wall

Plan exising head

Plan existing corner

Plan corner bay and existing

Section SIPS �at roof

Plan existing jamb

Section revamped roof

GLASER

Upon completion of Psi calculations across each house, the average heat loss factor over the entire exposed area of the house equals the

Gable: .063 W/mKMid Terrace: .094 W/mKMid Terrace Bay: .067 W/mK

THERM

Renewables:

PV panels �tted to the south facing roof bringgood A3 BERs acrossthe line to A2 with afuture FIT scheme announced, payback onPV is promisingIn this case, over 1000 kWhrs are generated pa, approx-.over 1/3 yearly water heating needs in delivered energy terms (DEAP source)

FRONT

SOUTH | FRONT REAR | NORTH

kW/m2 yr

kW/m2 yr

kW/m2 yr

F E1

E1

411317

kW/m2 yrA2 44

kW/m2 yrA2 42

kW/m2 yrA2 44

304

DEAP AS A DESIGN TOOL - VENTILATION

? WIN

DO

WS ? SPACE AND WATER HEATING SYS

TEMS ?

RE

NEW

ABLE

S? FA

BRIC

DES

ISIO

NS? B

ER ?

CO2?

DEAP

Biggest linear bridge locatedat chimney breast:

descision made to remove chimney breast

to base of found

Old �oor laid with ‘KingspanOptim-r low U Vacuum InsulationPanels, laid tight to �oor, tapedmetal foil layer, wood �bre boardunder Dalsouple �oor (vapour checkunder VIP)

PART MAcccessibility is examinedin each unit and futureliving needs are cateredfor with level access, widercorridors, accessibleshower / bathrooms atground �oor

Increased �oor areaprovides for greater spatialallocation mindful ofPart M