Heating mats on chipboard flooring

[BenEyles]

Fair comment! I've always used 9mm ply NOT the BS 15mm and never had a problem, ever! even using Vitra Flex, Ultra RSG or dunlop flex which arent the most flexible of ahesives. I did however just see the link "tiles popping up on a (9mm) ply floor" and seems that everyone is raving about boarding it instead of ply, do these boards have the same effect as ply, i.e brasing the floor and do u screw them or lay with adhesive?

 

[faithhealer]

Fair comment! I've always used 9mm ply NOT the BS 15mm and never had a problem, ever! even using Vitra Flex, Ultra RSG or dunlop flex which arent the most flexible of ahesives. I did however just see the link "tiles popping up on a (9mm) ply floor" and seems that everyone is raving about boarding it instead of ply, do these boards have the same effect as ply, i.e brasing the floor and do u screw them or lay with adhesive?

No Ben, these cement boards do not stop deflection in the floor. Last bouncy floor I did, fastened /re newed floorboards best I could, 1/2 " ply then hardie on top. Customer moaned about the height at first but ramped the carpet and threshold bar up and you can't tell there is an inch height difference

 

[BenEyles]

Yes that makes sense, but what i mean is if you have a solid chipboard floor which is solid or minimal movement are the backer boards enough to brase the chipboard joints alone or do you still have to ply the floor first, eg if you tile directly onto the chip board obviously the tiles would lift and crack on the joint between two chipboards, but is the backerboard enough to brace it?

Never had to use backer board so i wouldnt know, always used Detra or 9mm ply!