D
dogbower
Hi
We have a kitchen/diner with wet underfloor heating, its a n L shaped room 8M long by 6m at its widest, narrowing down to 4M.
We installed the underfloor heating ourselves, in a 70mm sand and cement screed, around 7 years ago. I then tiled the screed with large format slate tiles. After a couple of years the tiles showed signs of movement in some of the grout lines, and gradually some tiles have come loose.
I have now lifted all the tiles to sort this out and found, a couple of cracks in the slab, and poor adhesion between adhesive and tiles.
This appears to be because, I didn't put an expansion strip through the slab? The UFH has 2 circuits in this room.
I also have areas of the room that are not heated, under cabinets etc, but they are tiled
The screen was fully dry before tiling, underfloor heating off when tiling and gradually back on after.
I now want to sort this out and would like some advice.
I am planning to-
Prime the screed, self level in a couple of areas, fit decoupler membrane throughout the room, tile.
I am planning to use Webber Spf rapid set adhesive.
Do you think this should sort my movement issues?
Any other suggestions? Do I need to look at an expansion strip as well?
Thanks Stuart.
We have a kitchen/diner with wet underfloor heating, its a n L shaped room 8M long by 6m at its widest, narrowing down to 4M.
We installed the underfloor heating ourselves, in a 70mm sand and cement screed, around 7 years ago. I then tiled the screed with large format slate tiles. After a couple of years the tiles showed signs of movement in some of the grout lines, and gradually some tiles have come loose.
I have now lifted all the tiles to sort this out and found, a couple of cracks in the slab, and poor adhesion between adhesive and tiles.
This appears to be because, I didn't put an expansion strip through the slab? The UFH has 2 circuits in this room.
I also have areas of the room that are not heated, under cabinets etc, but they are tiled
The screen was fully dry before tiling, underfloor heating off when tiling and gradually back on after.
I now want to sort this out and would like some advice.
I am planning to-
Prime the screed, self level in a couple of areas, fit decoupler membrane throughout the room, tile.
I am planning to use Webber Spf rapid set adhesive.
Do you think this should sort my movement issues?
Any other suggestions? Do I need to look at an expansion strip as well?
Thanks Stuart.