FLEXIFAST METHOD
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Flexifast Fasteners securely hold Foilboard Insulation Panels in underfloor applications for both timber and steel frames. They simplify installation, create optimal reflective airspace for maximum thermal performance, and ensure a durable, efficient thermal barrier. Ideal for new builds or retrofits, they allow quick, precise placement without compromising structural integrity
INSTALLATION ACCESSORIES
**Foilboard Insulation Panel Dimension: 240mm x 1200mm (2.88m2)**
Total System R Values Flexifast / Timber Joist
FOILBOARD PANEL | REFLECTIVE AIRSPACE ABOVE FOILBOARD | HEAT FLOW DOWN | HEAT FLOW UP |
|---|---|---|---|
GREEN 50 | 90mm | Rt4.1 | Rt2.6 |
GREEN 30 | 110mm | Rt3.8 | Rt2.2 |
GREEN 20 | 120mm | Rt3.7 | Rt2.0 |
GREEN 15 | 125mm | Rt3.6 | Rt1.9 |
System Description: Suspended timber floor, sealed airspace above Foilboard, enclosed subfloor, 19mm tongue and groove flooring, 140mm x 45mm timber joist at 450mm c/c, 300mm x 50mm pine bearer at 3600mm c/c. Ground thermal resistance based on subfloor ventilation area per perimeter length 6000mm2/m = R0.58 heat flow out and R0.56 heat flow in. Foilboard installed anti-glare side down. Fully sealed airspace assumes no dust cover on upward facing surfaces. Enclosed cavity to prevent air ingress.
Calculated per AS/ NZS 4859, Part 1&2 2:2018.
If elements of construction vary from that described, this may produce a different thermal resistance result.
Total System R Values Flexifast / Steel Joist
FOILBOARD PANEL | REFLECTIVE AIRSPACE ABOVE FOILBOARD | HEAT FLOW DOWN | HEAT FLOW UP |
|---|---|---|---|
GREEN 50 | 100mm | Rt2.7 | Rt2.0 |
GREEN 30 | 120mm | Rt2.7 | Rt1.8 |
GREEN 20 | 130mm | Rt2.6 | Rt1.7 |
GREEN 15 | 135mm | Rt2.6 | Rt1.6 |
System Description: Suspended timber floor, sealed airspace above Foilboard, enclosed subfloor, 19mm tongue and groove flooring, 150mm x 50mm x 1.9mm steel joist at 450mm c/c, 250mm x 5600mm. Ground thermal resistance based on subfloor ventilation area per perimeter length 6000mm2/m = R0.58 heat flow out and R0.56 heat flow in. Foilboard installed anti-glare side down. Fully sealed airspace assumes no dust cover on upward facing surfaces. Enclosed cavity to prevent air ingress.
Calculated per AS/NZS 4859, Part 1&2 2:2018.
If elements of construction vary from that described, this may produce a different thermal resistance result.
If the R-Value required for your project is not listed in the table above, please complete the Underfloor R-Value Request Form and submit the necessary project details.
DISCLAIMER All statements and technical information contained herein are based on tests we believe to be reliable, but the accuracy thereof is not guaranteed. Users assume all risk and liability resulting from the use of the product and must confirm the suitability thereof by their own calculations. Conditions of Sale contain a limited warranty against manufacturing defects. Where applicable, Foilboard GREEN should be installed per the National Construction Code (NCC), state building legislation and/or a performance solution.
Added Insulation R Values Flexifast / Timber Joist
Added Insulation R Values Flexifast / Timber Joist
FOILBOARD PANEL | REFLECTIVE AIRSPACE ABOVE FOILBOARD | HEAT FLOW DOWN | HEAT FLOW UP |
|---|---|---|---|
GREEN 50 | 90mm | R3.4 | R1.7 |
GREEN 30 | 110mm | R3.1 | R1.3 |
GREEN 20 | 120mm | R2.9 | R1.1 |
GREEN 15 | 125mm | R2.8 | R0.9 |
System Description: Suspended timber floor, sealed airspace above Foilboard, enclosed subfloor, 19mm tongue and groove flooring, 140mm x 45mm timber joist at 450mm c/c, 300mm x 50mm pine bearer at 3600mm c/c. Ground thermal resistance based on subfloor ventilation area per perimeter length 6000mm2/m = R0.58 heat flow out and R0.56 heat flow in. Foilboard installed anti-glare side down. Fully sealed airspace assumes no dust cover on upward facing surfaces. Enclosed cavity to prevent air ingress. Calculated per AS/ NZS 4859, Part 1&2 2:2018. Added insulation R value includes the material insulation R value and the R values of the associated reflective airspaces within the insulation system less non-reflective enclosed subfloor air film.
If elements of construction vary from that described, this may produce a difference thermal resistance result.
Added Insulation R Values Flexifast / Steel Joist
FOILBOARD PANEL | REFLECTIVE AIRSPACE ABOVE FOILBOARD | HEAT FLOW DOWN | HEAT FLOW UP |
|---|---|---|---|
GREEN 50 | 100mm | R3.5 | R1.7 |
GREEN 30 | 120mm | R3.1 | R1.3 |
GREEN 20 | 130mm | R2.9 | R1.1 |
GREEN 15 | 135mm | R2.8 | R0.9 |
System Description: Suspended timber floor, sealed airspace above Foilboard, enclosed subfloor, 19mm tongue and groove flooring, 150mm x 50mm x 1.9mm steel joist at 450mm c/c, 250mm x 5600mm. Ground thermal resistance based on subfloor ventilation area per perimeter length 6000mm2/m = R0.58 heat flow out and R0.56 heat flow in. Foilboard installed anti-glare side down. Fully sealed airspace assumes no dust cover on upward facing surfaces. Enclosed cavity to prevent air ingress. Calculated per AS/NZS 4859, Part 1&2 2:2018. Added insulation R value includes the material insulation R value and the R values of the associated reflective airspaces within the insulation system less non-reflective enclosed subfloor air film.
If elements of construction vary from that described, this may produce a difference thermal resistance result.
If the R-Value required for your project is not listed in the table above, please complete the Underfloor R-Value Request Form and submit the necessary project details.
DISCLAIMER All statements and technical information contained herein are based on tests we believe to be reliable, but the accuracy thereof is not guaranteed. Users assume all risk and liability resulting from the use of the product and must confirm the suitability thereof by their own calculations. Conditions of Sale contain a limited warranty against manufacturing defects. Where applicable, Foilboard GREEN should be installed per the National Construction Code (NCC), state building legislation and/or a performance solution.