Kingspan Kooltherm K10W G2 Soffit Board

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$124.87

$124.87 $131.45

GST inclusive

Thickness

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 K10W is the white faced version of the K10 phenolic soffit board, for concrete soffits and ceilings that stay exposed to view. CodeMark certified for NCC compliance.

The facing is the whole difference

Same phenolic core and the same thermal performance as K10 G2, with a white aluminium foil lower facing instead of a bright reflective one. In a carpark, a plant room or an exposed underside, that finish is what lets the insulation be the final surface rather than something that needs covering. It also lifts the light level in a space with no ceiling.

Thin for the R-value

Thermal conductivity is 0.022 W/m·K at 45 mm and thicker. The range runs 25 mm at R1.10 through to R4.60, all in 2400 x 1200 mm boards. Where headroom is being fought over, phenolic gets you there in less depth than most alternatives.

Fire and certification

NCC Group 2, spread of flame index 0, smoke development 3 or lower, FM 4880 approval for 25 to 119 mm. Fibre-free core, 10 year warranty subject to the full Kooltherm terms.

Full thickness, R-value and compliance figures are in the table below.

Technical data

Kingspan product data sheet (PDF)

Kingspan Insulation · Rigid thermoset phenolic board with white facing · Exposed concrete soffit and ceiling application

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
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

Same core and same R-values as the standard K10 G2. The difference is the facing.

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	100 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	White 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

Pick this over the standard K10 G2 when the soffit stays in view and you want a clean white ceiling without a separate lining, for example over a car park entry or an undercroft. Set the boards out so joints land on a fixing and butt them tight, since every joint shows on a finished surface. Handle by the edges to keep the white facing unmarked and keep the boards dry on site.

Figures are taken from the Kingspan Insulation product data sheet for Kooltherm K10 G2W White 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?

9 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. 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.