Hi All
We had a new bathroom fitted in December last year. Very pleased with it in general, but having huge problems with the floor grouting. It's only a small floor area (4ftx5ft), and we noticed the grout crumbling (but only in certain areas, generally those with the most traffic), around about January. We've just had the tilers back to re-grout the affected areas, but 3 days later it's all starting to crumble again. The floor seems to be rigid enough, and I can't detect any tile movement. When you tap the tiles you don't get a hollow sound, everything sounds quite firm.
Total floor area tiled is 4ftx5ft, affected area is generally in the middle of the floor, around 2ftx2ft.
Original floor is timber floorboards. These were very sound and had no discernible flex.
We used No More Ply backer board as per manufacturers spec, screwed down correctly and staggered. There is underfloor heating, this is laid and secured on top of the No More Ply. A self levelling screed was also used.
Flexible tile adhesive and Unibond flexible grout .
What to do?
Many thanks
Alex
We had a new bathroom fitted in December last year. Very pleased with it in general, but having huge problems with the floor grouting. It's only a small floor area (4ftx5ft), and we noticed the grout crumbling (but only in certain areas, generally those with the most traffic), around about January. We've just had the tilers back to re-grout the affected areas, but 3 days later it's all starting to crumble again. The floor seems to be rigid enough, and I can't detect any tile movement. When you tap the tiles you don't get a hollow sound, everything sounds quite firm.
Total floor area tiled is 4ftx5ft, affected area is generally in the middle of the floor, around 2ftx2ft.
Original floor is timber floorboards. These were very sound and had no discernible flex.
We used No More Ply backer board as per manufacturers spec, screwed down correctly and staggered. There is underfloor heating, this is laid and secured on top of the No More Ply. A self levelling screed was also used.
Flexible tile adhesive and Unibond flexible grout .
What to do?
Many thanks
Alex