K10 Kooltherm
Kooltherm K10 G2 Soffit Board
Keep the headroom, lose the heat , slim phenolic insulation for concrete soffits.
- Kingspan
- In stock in Osborne Park
Sizes and codes
| Thickness | Stock |
|---|---|
| 25mm | In stock |
| 30mm | In stock |
| 40mm | In stock |
| 45mm | In stock |
| 50mm | In stock |
| 60mm | In stock |
| 70mm | In stock |
| 80mm | In stock |
| 90mm | In stock |
| 100mm | In stock |
10 sizes. Ask the counter if you need one that is not listed.
Product Details
Kooltherm K10 G2 is a rigid phenolic soffit board for the underside of concrete floors and roofs. Its closed-cell phenolic core has a declared thermal conductivity of 0.022 W/m.K, which is why a K10 board reaches a target R-value at a noticeably thinner build-up than most alternatives , often the difference between keeping and losing clearance in a carpark.
The board carries a tissue-based upper facing and a reflective aluminium foil lower facing, and the core is fibre-free, so cutting and handling on site is cleaner than with fibrous products. Aussie Plasterboard supplies the full Kooltherm K10 range from Osborne Park with delivery across Perth.
Best for K10 G2
- Carpark ceilings and undercrofts where headroom is tight
- Exposed soffits above open or unheated areas
- Concrete roof soffits with no suspended ceiling
- Commercial and multi-residential slab undersides
- Projects requiring a Group 2 NCC classification at the soffit
Selecting the Right K10 G2
Choose your thickness
Thicknesses run from 25 mm to 90 mm. Work back from the Total R-value your specification calls for , 25 mm gives a declared R1.10 and 90 mm gives R4.10. If you are close to a threshold, ask us to run the calculation rather than rounding up and giving away clearance you did not need to lose.
Choose your facing
- K10 G2 , reflective foil lower face, the standard choice where the soffit is not a feature
- K10 G2W , white lower face for soffits left on show
- K10 PLUS , fibre cement face where Group 1 or impact resistance is specified
Check your fire requirement
K10 G2 carries a Group 2 NCC classification. If the specification calls for Group 1 at an exposed soffit, price K10 PLUS instead , substituting after the order is placed is an expensive correction.
Why Builders and Designers Specify K10 G2
- 0.022 W/m.K thermal conductivity, among the lowest available in a rigid board
- Thinner build-up for the same R-value, protecting clearance
- Fibre-free core, cleaner to cut and handle
- CodeMark certified for straightforward NCC compliance
- Compliant with AS/NZS 4859.1:2018
- Global GreenTag GreenRate certified for green building submissions
- FM 4880 approval available , check the FM Approvals listing for conditions
- Australian made
Installation Notes That Prevent Callbacks
Ready to order? Request a quote or call our Perth team for advice on thickness and fixing.
- Fix mechanically to the concrete soffit with fixings rated for the substrate and the board thickness , under-specified fixings are the most common callback on soffit work.
- Butt boards tight and keep joints consistent; gaps break the continuity of the insulation layer and show up as thermal bridges.
- Cut with a fine-toothed saw and support the board fully while fixing so the edge does not crumble.
- Confirm fixing type, centres and fire requirements against the current Kingspan installation guide before the first bay goes up.
Is Kooltherm K10 G2 the same as PIR?
No. K10 uses a phenolic core, which has a lower thermal conductivity than typical PIR, so a thinner board reaches the same R-value. Kingspan's PIR products sit under the Therma range, not Kooltherm.
What thickness do I need for my target R-value?
Declared values run from R1.10 at 25 mm to R4.10 at 90 mm. Total System R-value depends on the slab and the rest of the build-up, so send us the element detail and we will confirm the thickness.
Can it be left exposed in a carpark?
Yes. K10 G2 carries a Group 2 NCC fire classification and is widely used on exposed carpark soffits. Where Group 1 is specified, use K10 PLUS.
Does cutting it release fibres?
No. The core is fibre-free, which makes it cleaner to cut and handle than fibrous insulation.
Is the foil face a finished surface?
The foil is a low-emittance facing, not a decorative finish. Where the soffit is visible and appearance matters, K10 G2W with its white face is the better option.
Related Products
• Kooltherm K10 G2W White Soffit Board , same board with a white finish for visible soffits • Kooltherm K10 PLUS Soffit Board , fibre cement face, Group 1 NCC classification • Kooltherm K17 Insulated Plasterboard , insulate and line an internal wall in one fix • Kooltherm K8 Cavity Board , partial-fill insulation for masonry cavity walls
Product Specifications
| Product Thickness (mm) | Declared R-value | Board Size (mm) | Coverage per Board (m2) | Insulation Core | Facings | Compressive Stress |
|---|---|---|---|---|---|---|
| 25 | R1.10 | 2400 x 1200 | 2.88 | Rigid thermoset phenolic | Tissue upper / reflective foil lower | ≥100 kPa at 10% |
| 30 | R1.30 | 2400 x 1200 | 2.88 | Rigid thermoset phenolic | Tissue upper / reflective foil lower | ≥100 kPa at 10% |
| 40 | R1.75 | 2400 x 1200 | 2.88 | Rigid thermoset phenolic | Tissue upper / reflective foil lower | ≥100 kPa at 10% |
| 45 | R2.05 | 2400 x 1200 | 2.88 | Rigid thermoset phenolic | Tissue upper / reflective foil lower | ≥100 kPa at 10% |
| 50 | R2.30 | 2400 x 1200 | 2.88 | Rigid thermoset phenolic | Tissue upper / reflective foil lower | ≥100 kPa at 10% |
| 60 | R2.75 | 2400 x 1200 | 2.88 | Rigid thermoset phenolic | Tissue upper / reflective foil lower | ≥100 kPa at 10% |
| 70 | R3.20 | 2400 x 1200 | 2.88 | Rigid thermoset phenolic | Tissue upper / reflective foil lower | ≥100 kPa at 10% |
| 80 | R3.65 | 2400 x 1200 | 2.88 | Rigid thermoset phenolic | Tissue upper / reflective foil lower | ≥100 kPa at 10% |
| 90 | R4.10 | 2400 x 1200 | 2.88 | Rigid thermoset phenolic | Tissue upper / reflective foil lower | ≥100 kPa at 10% |
| 100 | R4.60 | 2400 x 1200 | 2.88 | Rigid thermoset phenolic | Tissue upper / reflective foil lower | ≥100 kPa at 10% |
Scroll the table sideways to see every column.
More k10 kooltherm
-
Kooltherm K10 G2W White Soffit Board
The same thermal performance as K10 G2, with a finish you can leave on show.
-
Kooltherm K10 PLUS Soffit Board
Group 1 fire classification and an impact-resistant face, over the same phenolic core.