• PaddedImage570316FFFFFF underfloor heating insulation boards
  • PaddedImage570316FFFFFF underfloor heating coated insulation boards

Another benefit is that the use of insulation boards helps reduce utility bills and carbon footprint.


Our insulation boards are a water resistant, insulated tile backer board made of extruded polystyrene, faced on both sides with a fibreglass mesh embedded into a thin cement polymer mortar.


The board is designed to withstand a load of 30 tonnes per square metre and is ideal for use with underfloor heating as it prevents the heat from penetrating down into the substrate below.


As a wall tile backer board, tiles can be fixed directly onto the surface without prior preparation and being waterproof, is suitable for bathrooms or showers. To meet Building Regulations, thick layers are required and we will be able to calculate this for you.

Key Features and Benefits

  • Increased energy efficiency

    The boards help cutting the heat-up time by up to 90%

  • Strong but flexible

    Made from extruded polystyrene the boards withstand a load of 30 tonnes per square metre and they can be cut to size to suit all shapes of rooms

  • Waterproof and soundproof in one single step

    The boards are ideal in waterproofing bathrooms and kitchens and also carry sound proofing properties

  • High thermal insulation

    The boards create a barrier to cold rising from the subfloor with high R values

Board Size

1250mm(L) x 600mm(W)


6mm, 10mm, 20mm, 50mm

Load Bearing

30 tones/m²

R values (m²K/W)

6mm 0.16; 10mm  0.28; 
20mm 0.58; 50mm 1.50

Fire Rating

Class "O" / "B1"


EUFH insulation boards approvals

WIB06 6 600 1250 1.95 0.16
WIB10 10 600 1250 2.22 0.28
WIB20 20 600 1250 2.48 0.58
WIB50 50 600 1250 3.26 1.50

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