Nassboards XPS Boards Floor Underlay Thermal Insulation Underfloor Heating - 5 x 6mm (3.6m2)

Easy to use

Covered 5m² concrete subfloor for underfloor electric heating, easy to cut. Already feeling the heat benefits and highly recommended using (though trade's people told me not to bother, but these matts stop heat being lost to the concrete so win win I say).

Giving 4* as it is a bit too soft as i expected. While laying boards, i just kneeled and i made a dent on it.

Used with under floor heating bought from the same company. Both now under Porcelain tiles. The whole lot went down on to a concrete floor and replaced the laminate previously installed. Under floor heating not yet on but floor already feeling warmer underfoot.The one thing i wish i had never done was put laminate in the kitchen should have gone straight to tile.

Easy to use, but for floor underlay use a flooring board above to protect from dimpling if you have to walk on it.

They feel like hard polystyrene and dent fairly easily when knelt on, very light weight with not much substance but they have done the job and they do insulate well. We cemented them down with tile adhesive onto a leveled floor and used underfloor heating over then tiled on top. It is impossible not to dent them while on hands and knees laying the heat mats. But easy to cut into shape, our floor looks and feels good.

Used to lay under underfloor heating, levelled with self levelling screed then tiled

Easy to carry as this is lightweight cheap rubbish. Not to be confused with cement board, it has no decoupling properties at all. Flimsy and will break easily. The thermal properties seem adequate but I'd suggest only to be used on a solid floor.