Hi - I've read lots of advice here and elsewhere on tiling onto timber floors, including gcol's detailed FAQ here, but haven't seen this question answered before.
I have a new kitchen coming and I want to tile the floor. It used to be a lounge and the plumbing work has pretty much wrecked the original chipboard floor (as expected). I therefore have free reign as to what I put down under the heating and tiles.
Reading around, it looks like its best to use an insulating layer under the UFH, e.g. 10mm extruded polystyrene (Marmox or similar), and given this, what's the best option for going beneath it? 18mm chipboard on its own (cheap in both senses), 18mm ply with noggins (expensive and lots of work - it's a big room and my joinery skills are poor), or a combination of both (e.g. 18mm chipboard, 9mm ply, 10mm marmox).
The joists are 2x4s supported by bricks at about 1.5m intervals across a 4.5m span.
What would you do?
Thanks in advance.
I have a new kitchen coming and I want to tile the floor. It used to be a lounge and the plumbing work has pretty much wrecked the original chipboard floor (as expected). I therefore have free reign as to what I put down under the heating and tiles.
Reading around, it looks like its best to use an insulating layer under the UFH, e.g. 10mm extruded polystyrene (Marmox or similar), and given this, what's the best option for going beneath it? 18mm chipboard on its own (cheap in both senses), 18mm ply with noggins (expensive and lots of work - it's a big room and my joinery skills are poor), or a combination of both (e.g. 18mm chipboard, 9mm ply, 10mm marmox).
The joists are 2x4s supported by bricks at about 1.5m intervals across a 4.5m span.
What would you do?
Thanks in advance.