S
SJPurdy
So back to the original post:
construct rigid stable18mm ply floor primed, gapped, screw 300c/c etc.
cover with 10mm insul board (eg Wedi fixed to their spec) in tiled rooms and 12mm in hallway; idealy with a 6mm gap between them in the doorways aligned with where there will be a joint in the tiles.
Fit undertile heating wires and cover all with SLC but preventing it filling the 6mm gap.
Cover with ditra mat again leaving the 6mm gap (I think this is optional but it should give better heat distribution and more uncoupling than the insul board alone).
Tile, grout and then fill the 6mm gap with foam and matching sealant.
If it makes it easier cut out the gap in all the layers when you have tiled up to it rather than trying to guesss where it will be.
This way you have the appearance of a continuous floor with the doorway joint a bit wider (6mm rather than the normal 3mm).
construct rigid stable18mm ply floor primed, gapped, screw 300c/c etc.
cover with 10mm insul board (eg Wedi fixed to their spec) in tiled rooms and 12mm in hallway; idealy with a 6mm gap between them in the doorways aligned with where there will be a joint in the tiles.
Fit undertile heating wires and cover all with SLC but preventing it filling the 6mm gap.
Cover with ditra mat again leaving the 6mm gap (I think this is optional but it should give better heat distribution and more uncoupling than the insul board alone).
Tile, grout and then fill the 6mm gap with foam and matching sealant.
If it makes it easier cut out the gap in all the layers when you have tiled up to it rather than trying to guesss where it will be.
This way you have the appearance of a continuous floor with the doorway joint a bit wider (6mm rather than the normal 3mm).
