Tile backer board

Tile backer boards (Insulation boards) are high performance, reinforced insulation boards made of waterproof extruded polystyrene, faced on both sides with a fibreglass mesh embedded into a thin cement polymer mortar.

These can be used as a structural tile backer board in the floor, and will save you money when used in conjunction with underfloor heating by acting as a very efficient thermal barrier. They reflects the heat upwards into the floor tile instead of allowing heat to warm up the concrete slab below.
 
Advantages:
Waterproofing and a barrier against damp
Thermal insulation
Good sound absorption
Load bearing-350kpa
CFC & Asbestos free
Unaffected by freeze/thaw cycle
Easy to install, can be cut easily with saw or knife.
 
Applications:
Wet rooms & shower cubicles
Rigid boarding for partitions
Tile backing board
Under floor heating insulation.
Dry lining / Insulation to cellars
Loft conversions
 
Size available:
Thickness: 6mm, 8mm,10mm, 20mm, 30mm, 40mm, 60mm.
Width: 600mm
Length: 1200mm, 1250mm, 2500mm.
Customized dimensions are available based on your requirement.