ClimaFoam® 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 in shiplap or square edge.


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.


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.

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.


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.