jim malek - insulation, performance & certification
TRANSCRIPT
Jim Malek
Insulation,
Performance
&
Certification
Jim Malek Introduction
• Thermal Insulation - The Basics K – Value
U – Value
R – Value
Thermal Bridging
• Poly Urethane Insulation PIR
Phenolic Insulation
• Fibrous Insulation Mineral wool
Fibre Glass
Granulated Insulation
• Reflective Insulation Thermo Cellular
Reflective Foil
• Polystyrene XPS
EPS
• How to choose the right
Insulation
• Sustainability Building Regulations
• What to look out for Certification
Jim Malek
THERMAL
INSULATION:
THE BASICS
Thermal Insulation: The basics
Jim Malek
HEAT = ENERGY
ENERGY = EXPENSE
CONTROL HEAT
Thermal Insulation: The basics
Jim Malek
Heat is transferred in 3 ways:
Radiation
Convection
Conduction
Thermal Insulation: The basics
Jim Malek Thermal Insulation: The basics
Summer
Jim Malek
•Pipe Insulation Oil Refinery plants and buildings to keep liquids @ a regulated
temperature, typical products should have good fire properties,
shear strength, and compression strength.
•Refrigeration Insulation Needs to have excellent thermal properties & excellent
compressive strength
•Building Envelop Insulation Consider ease of application
Lifespan of the product,
Fire Properties,
Eco Friendliness
Manufacture warranties
Climate
•HVAC Industry Fire
Ease of application
•Transportation Ease of application
Fire properties
Water absorption
•Space Effects of Radiant energy
Why & Where is Insulation used?
Jim Malek Thermal Insulation: The basics
Image from http://buildipedia.com
Bulk insulation
Jim Malek Thermal Insulation: The basics
Reflective insulation
Jim Malek Understanding the Thermal Properties
• What does it all mean? • The K factor is the measure of heat that passes
through one square foot of material that is 1 inch thick
in an hour. Usually, insulation materials have a K
Factor of less than 1. The lower the K value, the better
the insulation.
• The R-factor is not constant. It is the Thermal
Resistance factor of insulation. In layman’s terms, this
refers to the effectiveness of the insulation at retarding
the transfer of heat.
• U Factor stands for Thermal Conductance Factor. It’s
the quantity of heat, measured in W/m2.K, that passes
through a foot of insulation material. Mathematically,
it’s the K-factor divided by the thickness of the
insulation material. Just like the K Factor, the lower
the U factor, the better the insulating properties of the
material. The U value also takes into consideration the
whole building element.
• For example, if you have a product
with a K 0.040 and another with
K0.020, the product with the lower K
value will in effect help you cut your
insulation in half!
Jim Malek R-Values
Material
R-Value (R)
Total
U-Value (U)
Product thermal resistance
+ Insulation thermal resistance
+ Building material thermal resistance
+ Internal air film thermal resistance
+ External air film thermal resistance
+ Air gap thermal resistance
Jim Malek R-Values
Air space R-values
C = Ehr+hc
C = co-efficient for total heat transfer through the air space
E = effective emissivity of the air space
hr = calculated by means of the Stefan-Boltzmann Law:-
hr = 0.172x10-8 (T14 – T2
4)
(T1– T2)
T = Absolute temperature of bounding surfaces
hc = convection/conduction coefficient
Jim Malek
U-VALUES
&
K-VALUES (λ)
Thermal Insulation: The basics
Jim Malek U-Values
R-Value (R) =
U-Value (U) =
Thermal Resistance
Thermal Transmittance
The insulation material resistance to heat flow (m2.K/W).
The amount of heat transmitted through the insulation material (W/m2.K)
U-Value = or R-Value = U-Value R-Value
1 1
Jim Malek K-Values
K-Value (λ) = Thermal Conductivity
Physical property of a material expressing its ability to conduct heat (W/m.K)
K-Value
Thickness (m) R-Value =
Jim Malek Product range – Which Insulation?
Thicknesses to achieve equivalent of 100mm Phenolic insulation*
210 mm
200 mm
190 mm
190 mm
145 mm
110 mm
100 mm
Cork
Glass Mineral Fibre
Rock Mineral Fibre
Expanded Polystyrene
Extruded Polystyrene
Rigid Urethane
Phenolic 0.020
0.038
0.040
0.042
0.022
0.030
0.038
Jim Malek
THERMAL BRIDGING
&
THERMAL BREAK
Jim Malek Thermal Bridging
Heat energy transfers
across building
elements
Heat gain
Jim Malek Roofs: Thermal Breaks
Thermal Break
reduces conduction or
Thermal Bridging
Jim Malek
Type: Bulk Fibre
Description: Spun molten rock fibres bonded with resin
Suitable for:
Non-combustible
Good acoustics
Slightly lower conductivity than glasswool
Allergenic
Settles
Can absorb moisture
Thermal Insulation
Rock Mineral Fibre
(Rockwool)
Image from www.certainteed.com
Jim Malek
Type: Loose fill or batt form
Description: Natural wool.
Suitable for:
Easily pumped in installation
Fire retardant
Can compress and settle over time
Can absorb moisture
Chemicals added to make it rodent resistant and fire
retardant
Types of Insulation
Wool
Jim Malek
Type: Bulk Fibre
Description: Spun molten glass fibres bonded with resin
Suitable for:
Non combustible
Easy to cut
Allergenic and itchy to handle (PPE required)
Can easily compress
Can absorb moisture
Thermal Insulation
Fibreglass (Glasswool)
Image from www.ascentonline.com.au
Jim Malek
Type: Loose Fill
Description: Granulated rockwool.
Suitable for:
Can be retrofitted in cavity walls
Must be treated with water repellent to avoid bridging
the cavity
Thermal Insulation
Granulated Rockwool
Jim Malek Fibre Insulation
Product Mineral Insulation Glass Insulation
OHS Caution required in case of skin and respiratory
contamination
Caution required in case of skin and
respiratory contamination
Fire Can give excellent fire performance needs to be
certified and checked as behaviour can be effected
when foil attached
Can give excellent fire performance needs to
be certified and checked as behaviour can be
effected when foil attached
Density Vary from 12kg to 150+ 12kg to 50 KG
K Value 0.038 0.040
Cell Structure Open Cell Open Cell
Consideration with
application Do not compress as this will reduce effectiveness
Insure correct density is used for the correct application
Do not get wet
Same
Jim Malek
Type: Reflective
Description: Polymer air-cellular or closed-cell pliable foam core
sandwiched between 2 layers of highly reflective aluminium foil
Suitable for:
Excellent radiation barrier
Fibre-free
Vapour barrier or vapour permeable versions
Moisture resistant and non allergenic
Can provide thermal break
Relatively low material R-value
Requires adjacent air space
Thermal Insulation
Thermo Cellular
Jim Malek
Type: Reflective
Description: Foil laminated to either side of glass fibre
reinforced paper or woven polyethylene scrim
Suitable for:
Vapour barrier or vapour permeable versions
Excellent radiant barriers
No material R-Value contribution
Thermal Insulation
Reflective Foil Laminate (RFL)
Jim Malek Reflective Foil Insulation
• High Thermal Performance /Low
Thermal Mass
• 3 Products in 1 application
Vapour barrier, Thermal
Insulation, Thermal Break
• Simple & Fast To Install
• Fibre-Free With No Health Risks
Product Reflective foil
Insulation
OHS Totally Safe (may need to wear sun
glasses on bright day)
Fire Can give excellent fire performance
needs to be certified and checked.
Density N/A
K Value N/A
Cell Structure Closed Cell Structure
Consideration
with
application
Limited in thermal performance
Jim Malek
Type: Rigid Board
Description: High performance, fibre-free rigid urethane resin insulation
core.
Suitable for:
CFC/HCFC-free with zero Ozone Depletion Potential (ODP)
Closed cell insulation core
Improved strength
Thermo-set non-absorbent core
Low conductivity relative to XPS
Perceived to be more expensive than other insulations
Thermal Insulation
PIR (polyisocyanurate)
Jim Malek
Type: Rigid Insulation Board
Description: Super high performance rigid thermoset core sandwiched
between composite facings
Suitable for:
CFC/HCFC-free with Zero Ozone Depletion Potential (ODP)
Ultra low conductivity = Highest R-Value per mm
Very low smoke emissions
Improved fire rating - Class 1 (BS 476 Parts 6 & 7)
Can be used as an EIFS
Perceived to be more expensive than other insulations
Thermal Insulation
Phenolic
Jim Malek Poly Urethane Insulation
Phenolic Insulation Polyisocyanurate
Polyurethane
Spray
Product Phenolic PIR Polyurethane
Spray
OHS No need for additional safety
equipment
No need for
additional safety
equipment
Require additional Safety
equipment
Density 32-40KG 32-40KG Erratic due to preparation on site
and application.
K Value Can be as low as 0.020 Can be as low as
0.022
Erratic due to preparation on site
and application.
Fire Can give excellent fire
performance needs to be
certified and checked
Can Give good Fire
performance needs
to be certified and
checked
Can Give good Fire performance
needs to be certified and checked
Jim Malek
Type: Rigid Insulation Board
Description: Extruded polystyrene foam (XPS) consists of closed cells
and offers improved stiffness with reduced thermal conductivity.
Suitable for:
Material strength
Low thermal conductivity relative to EPS
Can be used in an EIFS
As a thermoplastic material it burns and melts easily
Thermal Insulation
Extruded Polystyrene (XPS)
Jim Malek
Type: Rigid Insulation Board
Description: Expanded polystyrene (EPS) is a rigid and closed-
cell foam. Usually white, it is made of pre-expanded polystyrene
beads.
Suitable for:
Relatively high compressive strength
Water resistant
Low cost
Thermoplastic material - burns and melts easily
Thermal Insulation
Expanded Polystyrene (EPS)
Image from www.finehomebuilding.com
Difficult to cut and shape without creating loose beads
Jim Malek Building Regulations; A Global Concept
Jim Malek Building Regulations (International)
Carbon foot print Expenditure of energy
Faced build up Including rendering systems
Cladding
Fire performance Indoor
Outdoor
Roof Build up Indoor
Outdoor
Comfortable Living
Conditions Water Temperature
Ducting Temperature
Space Temperature
Insulation play a pivotal roll in Building Regulation and
the Environmental Impact of the planet.
Jim Malek Accreditations
Jim Malek