Kooltherm K10 G2 Soffit Board
25mm - R1.10
$111.57
Sale price
$111.57
Regular price
$117.45
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Kooltherm K10 G2 Soffit Board
$111.57
Sale price
$111.57
Regular price
$117.45
GST inclusive
Dispatch: Most orders are processed the same day. Metro delivery: Usually 1–3 business days. We do our best to get most items out on the next business day.
Australia-wide freight · Local pickup from Epping, VIC by arrangement. Ordering from the outback? Get in touch about deliveries to remote locations · Shipping details
Kooltherm K10 G2 is a rigid thermoset phenolic soffit board with a reflective aluminium foil lower facing, for insulating concrete soffits and ceilings. CodeMark certified for NCC compliance.
Why phenolic when the space is tight
Thermal conductivity is 0.022 W/m·K at 45 mm and thicker, which is among the lowest of any board on the market. In practice that means it reaches a given R-value in noticeably less thickness than most alternatives, and in a carpark or a soffit where headroom is the constraint that is the entire argument. The range runs from 25 mm at R1.10 up to 100 mm at R4.60, all in 2400 x 1200 mm boards.
Fire and certification
NCC Group 2 to AS 5637.1, spread of flame index 0, smoke development 3 or lower, and FM 4880 approval for thicknesses 25 to 119 mm. The board is fibre-free.
Structural and moisture
Compressive stress averages over 100 kPa at 10% compression, and water vapour transmission is over 35 MN·s/g. Backed by a 10 year warranty for residential and commercial work, subject to the full Kooltherm terms.
Where the soffit is exposed to view, the K10W white faced version gives a finished appearance. Full thickness, R-value and compliance figures are in the table below.
Technical data
Kingspan product data sheet (PDF)Sizes stocked
| Nominal thickness | Declared R-value at 23 °C | Board size |
|---|---|---|
| 25 mm | R1.10 | 2400 x 1200 mm |
| 30 mm | R1.30 | 2400 x 1200 mm |
| 40 mm | R1.75 | 2400 x 1200 mm |
| 45 mm | R2.05 | 2400 x 1200 mm |
| 50 mm | R2.30 | 2400 x 1200 mm |
| 60 mm | R2.75 | 2400 x 1200 mm |
| 70 mm | R3.20 | 2400 x 1200 mm |
| 80 mm | R3.65 | 2400 x 1200 mm |
| 90 mm | R4.10 | 2400 x 1200 mm |
| 100 mm | R4.60 | 2400 x 1200 mm |
Thermal
| Thermal conductivity, 45 mm and thicker | 0.022 W/m·K at 23 °C |
|---|---|
| Thermal conductivity, 25 to 44 mm | 0.023 W/m·K at 23 °C |
| Test standard | AS/NZS 4859.1:2018 and ASTM C518-2017 |
| Emittance, foil face | 0.05 (ASTM C1371) |
Phenolic gives you more R-value per millimetre than almost anything else on the market, which is the whole reason to use it where headroom is tight.
Fire
| NCC group number | Group 2 (AS 5637.1:2015 and AS ISO 9705) |
|---|---|
| Spread of flame index | 0 |
| Smoke development | 3 or lower |
| SMOGRA-RC | 30 m²/s² x 1000 or lower |
| FM Approval | FM 4880, UBC 26-3 Class 1, for thicknesses 25 to 119 mm |
The FM approval covers ceiling and soffit installation only, with non-combustible walls. Early fire hazard properties tested to AS 1530.3.
Physical
| Compressive stress | On average over 100 kPa at 10% compression (AS 2498.3) |
|---|---|
| Water vapour transmission | Over 35 MN·s/g (ASTM E96 Part B) |
| Core | Fibre-free rigid thermoset closed cell phenolic |
| Upper facing | Tissue based |
| Lower facing | Reflective aluminium foil, bonded during manufacture |
Compliance and warranty
| Certification | CodeMark certified for NCC compliance |
|---|---|
| Thermal rating | Declared to AS/NZS 4859.1:2018 |
| Warranty | 10 years, residential and commercial, subject to the full Kooltherm warranty terms |
| Management systems | ISO 9001, ISO 14001, ISO 45001 and ISO 50001 certified manufacture |
Fitting notes
Fixed to the underside of a concrete slab with the foil face down, so it doubles as the finished soffit on a car park or plant room. Set the boards out so joints land on a fixing and butt them tight, because an open joint is both a thermal gap and an eyesore on exposed work. Cut with a fine tooth saw and keep the boards dry on site. If you need a white finish instead of silver foil, look at the K10 G2W version.
Figures are taken from the Kingspan Insulation product data sheet for Kooltherm K10 G2 Soffit Board, Australian edition. The full manufacturer document is linked above. Kingspan can change specifications without notice, so check the current sheet before specifying on a job.
Common questions
What sizes are stocked and how much does each one cover?
10 options are stocked, running from 25 mm to 100 mm. The table above lists each one with the coverage or quantity you get.
What thermal performance does it have?
Thermal conductivity, 45 mm and thicker: 0.022 W/m·K at 23 °C. Thermal conductivity, 25 to 44 mm: 0.023 W/m·K at 23 °C. Emittance, foil face: 0.05 (ASTM C1371). Thermal rating: Declared to AS/NZS 4859.1:2018.
How does it perform in a fire?
Spread of flame index: 0. Smoke development: 3 or lower.
How does it handle moisture?
Water vapour transmission: Over 35 MN·s/g (ASTM E96 Part B).
Does it meet Australian standards?
Test standard: AS/NZS 4859.1:2018 and ASTM C518-2017. NCC group number: Group 2 (AS 5637.1:2015 and AS ISO 9705). Certification: CodeMark certified for NCC compliance. Warranty: 10 years, residential and commercial, subject to the full Kooltherm warranty terms.
How is it installed?
Fixed to the underside of a concrete slab with the foil face down, so it doubles as the finished soffit on a car park or plant room. Set the boards out so joints land on a fixing and butt them tight, because an open joint is both a thermal gap and an eyesore on exposed work. Cut with a fine tooth saw and keep the boards dry on site. If you need a white finish instead of silver foil, look at the K10 G2W version.
Cannot see your question? Ask our team and we will get you an answer.
Figures are taken from the Kingspan Insulation product data sheet for Kooltherm K10 G2 Soffit Board, Australian edition. The full manufacturer document is linked above. Kingspan can change specifications without notice, so check the current sheet before specifying on a job.
