Suspended Slab | Foilboard Insulation Systems

Foilboard insulation installed beneath a concrete slab system

Foilboard panel shown positioned beneath a concrete slab section, demonstrating a suspended slab or concrete floor insulation application.

Foilboard insulation installed beneath a concrete slab system

Foilboard panel shown positioned beneath a concrete slab section, demonstrating a suspended slab or concrete floor insulation application.

1/1

SUSPENDED SLAB

Suspended slabs are a popular choice for strong, durable flooring in residential, commercial and industrial buildings. However, without effective insulation, they can become a major source of heat loss, making the spaces above colder and driving up energy costs.

Foilboard Insulation provides a high-performance solution designed specifically for suspended slab applications. Whether you're working on a new build or upgrading an existing structure, Foilboard helps deliver superior thermal performance, year-round comfort and long-term energy savings.

INSTALLATION ACCESSORIES

**Foilboard Insulation Panel Dimension: 2400mm x 1200mm (2.88m2)**

Total System R Values Underfloor Direct Fix

FOILBOARD PANEL	HEAT FLOW DOWN	HEAT FLOW UP
GREEN 50	Rt2.9	Rt2.2
GREEN 40	Rt2.7	Rt2.0
GREEN 20	Rt2.2	Rt1.6

System Description: 180mm concrete slab (k=1.44), direct fix Foilboard panel to underside of slab, enclosed subfloor 500mm. Ground thermal resistance based on sub floor ventilation area per perimeter length 6000mm2/m = R0.58 heat flow out and R0.56 heat flow in. Foilboard installed anti-glare side up. 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 Underfloor Batten Fixing

FOILBOARD PANEL	REFLECTIVE AIRSPACE ABOVE FOILBOARD	HEAT FLOW DOWN	HEAT FLOW UP
GREEN 50	28mm	Rt3.6	Rt2.6
GREEN 40	28mm	Rt3.4	Rt2.4
GREEN 20	28mm	Rt2.9	Rt1.9

System Description: 180mm concrete slab (k=1.44), 28mm x 38mm x 0.55 BMT space 600mm c/c, Foilboard insulation to underside of battens, anti-glare facing up, enclosed subfloor 500mm. Ground thermal resistance based on sub floor ventilation area per perimeter length 6000mm2/m = R0.58 heat flow out and R0.56 heat flow in. Foilboard installed anti-glare side up. 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 Suspended Slab Ceiling

FOILBOARD PANEL	REFLECTIVE AIRSPACE ABOVE/BELOW FOILBOARD	HEAT FLOW UP	HEAT FLOW DOWN
GREEN 50	20mm / 28mm	Rt2.4	Rt2.9
GREEN 25	20mm / 28mm	Rt1.9	Rt2.4
GREEN 15	20mm / 28mm	Rt1.6	Rt2.2

System Description: 200mm suspended concrete ceiling. 20mm reflective sealed airspace above Foilboard, Foilboard installed anti-glare side up, 28mm reflective sealed airspace, Foilboard, 28mm x 38mm x 0.55 BMT battens spaced 600mm c/c, 10mm plasterboard. 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.

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 Underfloor Direct Fix

Added Insulation R Values Flexifast / Timber Joist

FOILBOARD PANEL	ADDED INSULATION HEAT FLOW DOWN	ADDED INSULATION HEAT FLOW UP
GREEN 50	R1.9	R1.3
GREEN 40	R1.7	R1.1
GREEN 20	R1.2	R0.7

System Description: 180mm concrete slab (k=1.44), direct fix Foilboard panel to underside of slab, enclosed subfloor 500mm. Ground thermal resistance based on sub floor ventilation area per perimeter length 6000mm2/m = R0.58 heat flow out and R0.56 heat flow in. Foilboard installed anti-glare side up. 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 pathway less non-reflective enclosed sub floor air film.

If elements of construction vary from that described, this may produce a difference thermal resistance result.

Added Insulation R Values Underfloor Batten Fixing

FOILBOARD PANEL	REFLECTIVE AIRSPACE ABOVE FOILBOARD	ADDED INSULATION HEAT FLOW DOWN	ADDED INSULATION HEAT FLOW UP
GREEN 50	28mm	R2.6	R1.7
GREEN 40	28mm	R2.4	R1.5
GREEN 20	28mm	R1.9	R1.1

System Description: 180mm concrete slab (k=1.44), 28mm x 38mm x 0.55 BMT space 600mm c/c, Foilboard insulation to underside of battens, anti-glare facing up, enclosed subfloor 500mm. Ground thermal resistance based on sub floor ventilation area per perimeter length 6000mm2/m = R0.58 heat flow out and R0.56 heat flow in. Foilboard installed anti-glare side up. 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 pathway less non-reflective enclosed sub floor air film.
If elements of construction vary from that described, this may produce a difference thermal resistance result.

Added Insulation R Values Suspended Slab Ceiling

FOILBOARD PANEL	REFLECTIVE AIRSPACE ABOVE/BELOW FOILBOARD	ADDED INSULATION HEAT FLOW UP	ADDED INSULATION HEAT FLOW DOWN
GREEN 50	20mm / 28mm	R2.1	R2.6
GREEN 25	20mm / 28mm	R1.5	R2.1
GREEN 15	20mm / 28mm	R1.3	R1.9

System Description: 200mm suspended concrete ceiling. 20mm reflective sealed airspace above Foilboard, Foilboard installed anti-glare side up, 28mm reflective sealed airspace, Foilboard, 28mm x 38mm x 0.55 BMT battens spaced 600mm c/c, 10mm plasterboard. 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 pathway non-reflective enclosed sub floor air film.

INSTALLATION ACCESSORIES

Total System R Values Underfloor Direct Fix

Total System R Values Underfloor Batten Fixing

Total System R Values Suspended Slab Ceiling

If elements of construction vary from that described, this may produce a different thermal resistance result.

Added Insulation R Values Underfloor Direct Fix

Added Insulation R Values Flexifast / Timber Joist

Added Insulation R Values Underfloor Batten Fixing

Added Insulation R Values Suspended Slab Ceiling

If elements of construction vary from that described, this may produce a difference thermal resistance result.

About

Contact Information

Terms and Conditions

Warranty Information

Privacy Policy