ClimaFoam XPS Board Insulation

XPSProductClimaFoam® “Extruded Polystyrene (XPS)” is a high performance, water resistant and lightweight board of thermal insulation recommended for use under concrete slabs, green roofs, edge beams, cavity walls, external walls and cool rooms.

XPS has a high compressive strength and is available with either shiplap or tongue and groove (T&G) edges.


ClimaFoam XPS Board is ideal for applications in the construction industry as it is equipped for 'site survival' and can be cut to shapes that make it extremely fit for use. It also means that ClimaFoam XPS Board is ideal for a vast range of fabrication applications where the strength of the material as an infill in panels etc. is widely recognised and valued.

In short ClimaFoam XPS Board is two solutions in one......both a thermal AND structural insulation solution.


ClimaFoam XPS Board is more than a simple lightweight insulant. The inherent mechanical strength of the range means that a building element or fabricated item using ClimaFoam XPS Board can withstand a wide range of loading situations. Whether subjected to standard domestic loads or heavy industrial loads, in floors, roofs or in panels, ClimaFoam XPS Board is the ideal solution.

Water Resistant
Many insulants will get wet in use or during installation. ClimaFoam XPS Board is almost 100% closed cell and as such is unaffected by moisture. Whether laying ClimaFoam XPS Board in a floor (where there is often some standing water) or in a protected membrane roof system (where the insulation is exposed to water) the user can be confident ClimaFoam XPS Board will perform as stated.

The closed cell structure and density of ClimaFoam XPS Board allows specific edge details and surface finishes to be cut into the boards to make them as fit for the job as possible. Moreover, ClimaFoam XPS Boards can be cut into almost any shape using hot wires, saws or CNC technology to make it a highly versatile insulating and strengthening infill for any construction. Whether using it in building or as a specialist fabrication infill.

Multi-Use Foam Board

Material Code R-Value (m²K/W) kPa Thickness (mm) Length 
TBA 1.1 250 30 1,200 600 Shiplap
TBA 1.8 250 50 1,200 600 Shiplap

Pricing is GST Exclusive.

 ClimaFoam XPS Board - 1,200mm wide

Material Code R-Value (m²K/W) kPa Thickness (mm) Width (mm) Length (mm) Edge
434707 1.1 300 30 1,200 2,200 Shiplap
455554 1.5 300 40 1,200 2,200 Shiplap
434706 1.8 300 50 1,200 2,200 Shiplap
463076 2.8 300 75 1,200 2,200 Shiplap

Pricing is GST Exclusive.

ClimaFoam® XPS Board is manufactured in accordance with BS EN 13164, EN 16001 Energy Management Systems, OHSAS 18001 Occupational  Health and Safety Management Systems, ISO 14001 Environmental Management Systems, and ISO 9001 Quality Management Systems, as certified by Bureau Veritas.

Specification Guide

The edge beam / green roof / concrete slab / cool room* insulation shall be ClimaFoam XPS Board R**, **mm thick and 300kPa compressive strength. The product will be manufactured in accordance with BS EN 13164, EN 16001 Energy Management Systems, OHSAS 18001 Occupational Health and Safety Management Systems, ISO 14001 Environmental Management Systems, and ISO 9001 Quality Management Systems, by Knauf Insulation and shall be installed in accordance with the instructions issued by them. 

*architect to nominate relevant application. 

**architect to insert details of products used.

The continuous service temperature limit of ClimaFoam XPS Board is up to +70º C.

Compression Resistance
ClimaFoam XPS Board is highly resistant to compression and withstands both occasional and long term static loads. The high compressive strength and rigidity of the boards allows a range of ballast materials including gravel, soil and concrete slabs to be used as part of the construction. Load bearing construction elements should be designed to adequately support the combination of imposed and dead loads without creating excessive deflection.

Vapour Resistivity
The water vapour resistivity of ClimaFoam XPS Board is 625MNs/g.m when tested in accordance with ASTM E96-2010.

Moisture Absorption
ClimaFoam XPS Board has a moisture absorption 0.6% by volume when tested in accordance with ASTM C 272 and can be laid in standing water or up against wet concrete with negligible impact on the performance of the product.

Handling and Storage
ClimaFoam XPS Board is easy to handle and install. Ensure the board product is not stored close to open flames or other ignition sources and avoid volatile organic compounds and chemicals such as solvents. ClimaFoam XPS Board should not be left exposed to prolonged sunlight as this will result in surface degradation. When outside storage for extended periods is required cover the products with opaque/light coloured sheeting.