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Uncoated insulation boards

Lightweight insulation boards made of extruded polystyrene

uncoated insulation boards
electric underfloor heating


Under foil heating mats

Room Type

Ideal to insulate any room

Build Type

Renovation or New Build

The uncoated insulation boards are water resistant and are made of extruded polystyrene.

The board is designed for use under a screed coating. Special care must be taken to avoid contact between the electrical floor heating system and the insulating board, usually by means of a thin layer of adhesive or by installing a metal mesh on which the heating cables are attached.

uncoated insulation boards



Increase energy effectiveness

Accelerates the warm up time by 90%


Strong and flexible

The boards can be cut to any shape


Waterproof and soundproof

The boards are waterproof and have excellent sound proofing properties

Size 1250 x 600 mm
Thickness 10 and 20mm
Density 36 kg/m³
Thermal conductivity 0,031 W/m² ºK
Compressive strength 300 kPa
Water absorption 1,5% max
Fire class “E” (EN13501-1)