B
Bucks.
Been looking into it a bit more (Things are a lot clearer now) :hurray:
Devimat state
The devimat 100 Series is ideally suited to timber based floors.
The devimat 150 Series is ideally suited to heating tiled concrete floors.
Warmup state
When fitting the underfloor heater onto a timber subfloor, the floorboards or chipboard must be over-boarded with a suitable Warmup® Insulation Board or 18 mm WBP plywood. Existing floorboards must be fixed securely and, if necessary, pre-levelled with a latex/cement smoothing underlayment to give a flush fit for the WBP plywood or the Warmup® Insulation Board. Ply must be screwed at 200mm centres and installed as per BS 5385: Part 3 Clause 14.4.
Warmup® Insulation Board must be fixed with flexible tile adhesive. For best performance the board should also be secured with five screws and penny washers per board.
Warning: Fixing ply directly to the joists may not provide a sufficiently stable floor finish to accept tiles; fitting tongue and groove flooring and then over-boarding with ply or Warmup® Insulation Board is recommended.
Enermat State
The Enermat is primarily designed for installation on concrete floors. If layingEnermat on a wooden floor, all floors must be sheeted with Wedi board, Knauf Aquapanel or similar cement covered board which is compatible with heated floor systems or sheet the floor with 15mm WBP or Marine plywood, fix with screws at 200mm centres and then skim with 2-3mm of flexible tile adhesive and allow to dry, then proceed as installation for concrete base.
My Conclusioin
Pressure treated floor joists with Kingspan insulation between joists, area around shower tray T&G floorboards overboarded with 18mm WBP plywood, shower tray installed flush with plywood floor, walls boardered with Marmox 12.5mm tile backer boards, Tank Plywood floor inc showertray (I may also tank the walls in the main shower area, even though they should be waterproof if installed correctly) Then eventually 150w UFH (not 100% decided on what make yet)
Now for what to tank the floor with, I think I should maybe start another thread for this one.
THANKS for all your help & advise Guys its much appreciated
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