Kooltherm K10 G2 Soffit Board

Kooltherm K10 Product Wedge

Insulation for Concrete Soffits

Kingspan Kooltherm K10 G2 Soffit Board is a super high performance, fibre-free rigid thermoset phenolic insulation core, sandwiched between an upper tissue-based facing and a lower facing of highly reflective aluminium foil autohesively bonded to the insulation core during manufacture.

Kingspan Kooltherm K10 G2 Soffit Board is manufactured without the use of CFCs/HCFCs and has zero Ozone Depletion Potential (ODP) and low Global Warming Potential (GWP). 

  • Group 2 NCC fire classification
  • Fibre-free, closed cell insulation core
  • NCC and AS/NZS 4859.1:2018 compliant 
NCC 2019 compliant, AU made, Group 2 fire classification 

Total R-value Calculator

Customise your wall, roof and floor systems and produce NCC 2019 Total R-values Reports. Powered by Speckel.

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Product Information

Product Data Table
Specification Guide
Installation Instructions
CAD Drawings
Testing and Data Table

Declared Thermal Conductivity

0.022 W/m.K at 23oC (Insulant Thickness ≥ 45 mm)
0.023 W/m.K at 23oC (Insulant Thickness 25 - 44 mm)
Emittance (Foil Face) E0.05
Product Dimensions 2400 mm x 1200 mm (2.88 m2)
Nominal Product
25, 30, 40, 50, 60, 70, 80, 90 mm 

Technical Service

If your construction is different from those specified, and/or to gain a comprehensive R-value calculation and technical information of your project, please consult the Kingspan Insulation Technical Service Department for assistance. Call 1300 247 235 and press "2" to speak with Technical services, email technical@kingspaninsulation.com.au, or use the online contact form.

Assumption and Key

NCC 2019 prescribes different methods to determine Total R-value Calculations for Volume 1 and Volume 2. The systems noted on this page are Total R-values for the building element as required by the Energy Provisions of the National Construction Code, calculated in accordance with AS/NZS 4859.2 2018 & NZS 4214. Kingspan Kooltherm® products are manufactured, tested and packaged in conformance with AS/NZS 4859.1:2018

Product R-values

View Product R-values

Concrete Roof (Soffit) - No Suspended Ceiling

View System R-Value

Roof application, suspended ceiling void greater than 300mm

View System R-value

Concrete Floor (Soffit) - Unenclosed Sub-Floor

View System R-value

Concrete Floor (Soffit) - Enclosed Sub-Floor

View System R-value

Kooltherm K10 G2 Soffit Board Model Specification

You can also download the comprehensive model specification here.

Handling & Storage

View Instructions

Cutting and Taping

View Instructions

CAD PDF - Flat Concrete Roof Soffit_No Suspended Ceiling

Management Standards

Standard Management System
ISO 9001:2015 Quality Management
ISO 14001:2015 Environmental Management
ISO 45001:2018 Health and Safety Management
ISO 50001:2011 Energy Management

Product Testing

Characteristic Standard Result
Compressive Stress AS 2498.3 Typically exceeds 100 kPa at 10% compression
Water Vapour Resistance BS EN 12086:1997 / I.S. EN 12086:1998 > 35 MN·s/g

Fire Performance

Test Test Method Result
Flame Spread
Heat Release
Smoke Release
AS 1530.3  Spread of Flame Index: 0
Smoke Development ≤ 3
NCC Group Number  AS ISO 9705 Group 2
Tested in accordance with AS/NZS 5637 as required by NCC
FM Class No. 4880* UBC 26-3 Class 1
SMOGRARC AS ISO 9705  ≤ 30 m2/S2x1000
Fire-resistance test of elements of construction AS 1530.4** -/240/240 (HDPE pipe)
*This approval is valid for ceiling / soffit installation only, with non-combustible walls. Please contact us for correct installation instructions.
** Testing to AS 1530.4 performed in accordance with NCC BCA C3.15 Opening for service penetrations using a 120 mm concrete soffit.

Environmental Data Table

Aspect Characteristic
Recyclability Non-contaminated insulation site waste is recyclable, but there are currently no facilities in Australia to process returned material
Re-usability Re-usable if removed with care (long term of service expected)
Water Use No water used in Kingspan Insulation's manufacturing process
Blowing Agent Global Warming Potential (GWP) Manufactured with a blowing agent that has low GWP
Blowing Agent Ozone Depletion Potential (ODP) Manufactured with a CFC/HCFC-free blowing agent that has zero ODP
Packaging Contains 0% recycled product
Polythene wrap and EPS skids 100% recyclable

FM Certification

The Factory Mutual Approval standard for soffit lining boards is Class Number 4880:2015 (Approval Standard for Class 1 Fire Rating of Building Panels or Interior Finish Materials). Kingspan Kooltherm® K10 G2 Soffit Board (thicknesses up to, and including, 120 mm) produced at Kingspan Insulation’s Somerton manufacturing facility is certified as achieving Class 1 Fire Rating to Factory Mutual Class Number 4880.

For further details please contact the Kingspan Insulation Technical Service Department or alternatively search for Kingspan Insulation on www.approvalguide.com.

This approval is valid for ceiling / soffit insulation only, with non–combustible walls with no height restriction. This approval is valid for any fixing specification. However, for mechanical reasons, the fixing specification and the taping specification must still be followed.

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Kingspan Insulation Australia

Kingspan Insulation operates Australia wide. Contact us to find your local State Representative. For any enquiries, call 1300 247 235 or send an email to info@kingspaninsulation.com.au.

Head Office

25 Oherns Road,

Somerton, VIC


Call: 1300 247 235

Fax: 1300 247 329