insulTop 15

The thin thermal underlay for screeds

The thin and flexible thermal insulation underlay

insulTop 15 is the ideal thin thermal floor insulation if a lack of space prevents the use of any thicker traditional solution. This thermal underlay fits perfectly under the floating screed on ground floor level. It can also be used above cellars, under industrial floors, inside walls…


installation of the thermal insulation on a slab under a floating screed

Not enough space? Our thermal solution!

Despite a thickness of only 15 mm, the high insulation value of the polyolefin foam grants an excellent barrier against cold or rising damp. Furthermore, insulTop 15 is accompanied by an auto-adhesive strip (StickelTape) in order to obtain a perfectly waterproof solution.


  • Ultra thin cold barrier
  • Blocks rising
  • Quick and easy to install
  • Waterproof, flexible and very resistant
  • Unalterable in the long run
  • Can be applied everywhere where space is crucial
insulTop 15 thin thermal floor insulation
  • BBRI
roll of insulTop 15 the thin thermal underlayment for screed
roll of insulTop 15 the thin thermal underlayment for screed


Material :
Physically crosslinked polyolefin

Thickness :
15 mm (EN 823)

Color :
Light grey

Lambda value:
0,0356 W/mK

Thermal resistance:
1 layer : Rt = 0,42 m²K/W (EN 823:2013)
2 layers : Rt = 0,84 m²K/W (EN 823:2013)

Water absorption:
1% (tolerance : 10%)

4% under 5 kPa (tolerance : 10%)

80 % (tolerance : 10%)

25 m x 1 m

Datasheet - insulTop 15 Read online Download