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Polyfoam™ Roofboard Extra

Polyfoam™ Roofboard Extra

Third party certifications:
  • BBA Agrément Certificate

    BBA Agrément Certificate

    Certificate type

  • QA Certificate

    QA Certificate

    Certificate type

  • BSI Kitemark

    BSI Kitemark

    Certificate type

  • BRE Certificate

    BRE Certificate

    Certificate type

Polyfoam XPS Ltd

Polyfoam Roofboard Extra is a rigid extruded polystyrene (XPS) board with a Global Warming Potential (GWP) of less than 5 and achieves a BRE Certified Green Guide Rating of A.

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+44 (0)142 9855100 www.polyfoamxps.co.uk

Polyfoam Roofboard Extra is a high performance, rigid, extruded polystyrene board that is lightweight that has excellent structural strength and long term effectiveness.

Polyfoam Roofboard Extra is for use in flat roofing applications - from protected membrane roofs to single ply membrane roofs. Polyfoam Roofboard Extra has a Global Warming Potential (GWP) of less than five and Zero Ozone Depletion Potential (ODP).

General information

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Polyfoam XPS Ltd is a leading manufacturer of closed cell, extruded polystyrene insulation. The Polyfoam range is lightweight, strong, moisture resistant and easy to cut and shape, providing thermal performance and strength for the lifetime of the building. Polyfoam Roofboard Extra is suitable for inverted, green and blue roofs and benefits from a thermal conductivity of 0.033 W/mK and a compressive strength of 300 kPa. Manufactured in the UK using a blowing agent with low global warming potential (GWP) and zero ozone depletion potential (ODP), Polyfoam XPS products are free from CFCs and HCFCs. They have Environmental Product Declarations (EPDs) and raw material procurement is certified to BES 6001 (Responsible Sourcing of Construction Products). The Polyfoam XPS factory in Hartlepool has been assessed as operating under an ISO 9001:2015 Quality Management System, an ISO 14001:2015 Environmental Management System, an ISO 50001 Energy Management System, and an OHSAS 18001 Occupational Health & Safety Management System. Polyfoam Roofboard Extra also has a BBA Agrément certification for its Inverted Roof System.


Extruded polystyrene (XPS)




1250 x 600 x 245 mm

1250 x 600 x 230 mm

1250 x 600 x 220 mm

1250 x 600 x 200 mm

1250 x 600 x 180 mm

1250 x 600 x 160 mm

1250 x 600 x 130 mm

1250 x 600 x 100 mm

1250 x 600 x 70 mm

1250 x 600 x 50 mm

Uniclass 2015
Pr_25_71_63_29 Extruded polystyrene (XPS) boardsPrimary

J42/10 Warm deck roof covering

J42/440 Inverted roof insulation

Q37/310 Inverted roof insulation

J42/415 Extruded polystyrene (XPS) warm deck roof insulation

J41/10 Built-up reinforced bitumen membrane warm deck roof covering

J41/440 Inverted roof insulation

J31/340 Inverted roof insulation

J21/440 Inverted roof insulation

Specification data - Extruded polystyrene (XPS) boards
Product Reference

Polyfoam™ Roofboard Extra


50 mm

70 mm

100 mm

130 mm

160 mm

180 mm

200 mm

220 mm

230 mm

245 mm

Standard product features


  • Board length - 1250 mm.
  • Board width - 600 mm.

Edge profile:

15 mm lap joint.

Compressive strength (minimum):

300 kPa.

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.

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Third party certifications

Additional certifications:

  • Environmental Product Declarations
  • BES 6001: Responsible Sourcing of Construction Products
  • ISO 9001:2015 Quality Management System
  • ISO 14001:2015 Environmental Management System
  • ISO 50001 Energy Management Systems
  • OHSAS 18001 Occupational Health & Safety Management Systems
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