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Polyfoam Floorboard is a rigid, lightweight extruded polystyrene (XPS) insulation. Available in Standard, Extra and Super grades, it offers a range of compressive strengths for use in applications ranging from domestic floor slabs to intensively loaded industrial flooring. In addition to lambda values as low as 0.033 W/m·K, the thermally efficient foam boards are also robust and moisture resistant, making them suitable for basement walls and floors, swimming pool basins and perimeter insulation below DPC.

Related literature

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Standard product features


  • Board length - - 2500 mm; except ≥100 mm which are 1250 mm.
  • Board width - 600 mm.

Edge profile:

  • 25–75 mm: Square edge.
  • >100 mm: Lap joint.

Thermal conductivity:

0.033 W/m·K.


  • BRE Environmental Product Declaration.
  • BRE BES 6001.
  • Global Warming Potential (GWP) <5.
  • Zero ODP (Ozone Depletion Potential).
  • Free from CFCs and HCFCs.

Compressive strength (minimum):

200 kPa.

NBS Specification

NBS Create logo
This product is associated with the following NBS Create clause:
45-45-65/410 Extruded polystyrene (XPS) board

Product specification

An important note about specifying



Polyfoam XPS Ltd


+44 (0)142 9855100

Product reference

Polyfoam Floorboard Standard


[25 mm]
[35 mm]
[50 mm]
[65 mm]
[75 mm]
[100 mm]

Manufacturer details

Hunter House Industrial Estate,
Hartlepool, TS25 2BE
Tel +44 (0)142 9855100
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NBS National BIM Library