FAQs

XPS stands for Extruded Polystyrene. Polyfoam XPS offers high quality, high performance, rigid, closed cell, extruded polystyrene (XPS) insulation for use in domestic, commercial and industrial buildings.

An inverted roof is a type of warm roof construction, occasionally referred to as an ‘upside down’ or ‘protected membrane’ roof. Unlike a conventional warm roof build-up, the waterproofing is not installed as the outermost layer.

Extruded polystyrene (XPS) is suitable for inverted flat roofs and is classified as suitable for the widest range of roof applications by European technical guidance. Thanks to its robustness, an inverted roof featuring an XPS insulation layer can be designed as any of the following:

Untrafficked roofs.
Pedestrian access/roof terraces.
Car parking decks.
Green roofs and roof gardens.

The manufacture of Polyfoam extruded polystyrene (XPS) insulation involves a two-stage extrusion process. More can be read here.

Extruded polystyrene (XPS) is tolerant of damp or wet environments, meaning it can be installed externally of the basement structure and waterproofing without risk of its thermal performance being compromised.

Polyfoam Floorboard Extra is thermally efficient and offers a compressive strength capable of resisting the weight of soil against it. In a limited number of scenarios.

Swimming pool basins are almost always insulated around the outside of their structure. Like its suitability for basement applications, extruded polystyrene (XPS) insulation comes into its own. Its robustness when installed in contact with the ground, combined with its ability to bear the weight of concrete and water, makes it an excellent solution.