Tilebank thermal boards (tilebacker) boards are 1200 x 600 x 6mm 
tilebacker boards are waterproof and dimensionally stable substrate to tile to
Ideal for wetrooms
Easy to carry - and light weight unlike large sheets of plywood.
Excellent sound insulation: impact sound is greatly reduced
Cuts with a knife. no need for a jigsaw

Tilebank Thermal board tilebacker