Polyfoam™ Roofboard Super
Compare variants


Thermal insulation of flat roofs including:

  • Inverted roofs;
  • Green and blue roofs;
  • Conventional warm roofs;
  • Car park deck.


A lightweight, lap jointed board with high compressive strength.

Features and benefits:

  • Excellent thermal performance.
  • 15 mm lap joint.
  • High compressive strength.
  • Highly resistant to water absorption.
  • Able to resist repeated freeze/ thaw cycles.
  • Lightweight and easy to install.
  • Tough and durable, not easily damaged.
  • Dimensionally stable.
  • Thermal performance of an inverted roof is improved when used in conjunction with ‎Polyfoam Slimline Zero Membrane (specified separately).
  • Represents no known threat to the environment and has zero Ozone Depletion Potential (ODP) and a Global Warming Potential (GWP) of less than five.
  • 100% recyclable.

Technical characteristics:

  • Vapour resistivity: The water vapour resistivity of Polyfoam Roofboard Super is 750MNs/g.m when tested in accordance with BS EN 12086.
  • Moisture absorption: 0.7% by volume when tested in accordance with EN 12087 and can be laid in standing water with negligible impact on the performance of the product.
  • Durability: Continuous service temperature limits up to +70ºC.

General information





Extruded polystyrene.




1250 x 600 x 100 mm

1250 x 600 x 80 mm

1250 x 600 x 60 mm

1250 x 600 x 50 mm

Uniclass 2015

Pr_25_71_63_29 Extruded polystyrene (XPS) boardsPrimary


J21/440 Inverted roof insulation

J31/340 Inverted roof insulation

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

J41/440 Inverted roof insulation

J42/10 Warm deck roof covering

J42/440 Inverted roof insulation

Q37/310 Inverted roof insulation

Specification data - Extruded polystyrene (XPS) boards Enhanced data

Compressive strength (minimum) at 10% compression

500 kPa.

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.

Thermal conductivity (maximum)

0.034 W/m·K.


50 mm.

60 mm.

Face size (length x width)

1250 x 600 mm.


15 mm lap joint.

Product Reference

Polyfoam™ Roofboard Super

Environmental information



Digital objects

Platform Compatible Version Certified to




Download now from NBS National BIM Library


Polyfoam Roofboard Super

Polyfoam Roofboard Super

Polyfoam XPS Product Guide

Polyfoam XPS Product Guide

Similar products from Polyfoam XPS Ltd

Polyfoam™ Floorboard Extra

Polyfoam™ Floorboard Extra

Polyfoam™ Floorboard Standard

Polyfoam™ Floorboard Standard

Polyfoam™ Floorboard Super

Polyfoam™ Floorboard Super

Polyfoam™ Inverted Roof System

Polyfoam™ Inverted Roof System

Polyfoam™ Roofboard Extra

Polyfoam™ Roofboard Extra

Polyfoam™ Upstand Board

Polyfoam™ Upstand Board