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DHTiling
Hi Nell
I would sugest as you have the boards removed you do the following which will keep your height down :
Remove all existing boards.
Insulate between joists
Install an underfloor heating film (not a surface cable)
Overboard with 18/22mm Ply wood
Lay Dura-CI wetroom tanking / uncoupling membrane found HERE
Fix tiles and grout when thoroughly dry.
Tiler
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Hi tony..
Can't say i have heard of this system.....is it similar to the under laminate one..?
and i thought you have to leave ventilation under timber floors...? when tiling and UFH..
A bit more info on this system might help the member ...cheeeeeeeeers..