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- 24 Dec 2015
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I'm re-doing our bathroom and last week started tiling - which looked lovely except one tile was upside down and needed removing as the pattern didn't quite match. I was expecting it to be hard to get off, but actually it was incredibly easy - alarmingly so. Thankfully this highlighted a problem before I had got too far.
The history is that having removed the old tiles, the tiles behind those were incredible strong so I had PVA'd the surface before re-tiling. I know that there's two schools of thought regarding PVA, but it was the advice I was given.
The new adhesive was waterproof ready mix from a trade supplier, designed for bathrooms. When I removed the tile today, the new adhesive behind had turned to something like shortcrust pastry, not at all hard. The tiles were quite big (600x200mm). I'm not sure if I'd used too much, and have since read that with larger tiles the ready mix adhesive is not at all suitable as it does not dry. Maybe if I'd left it longer it would have done but after a week it was only the edge couple of mm that was not like pastry!
I've taken all of those tiles off, removed the old adhesive, and this time primed with BAL and bought some dry mix adhesive (Mapei Keraquick Rapid-Set Flexible Tile Adhesive).
So - will the better adhesive solve the problem? Also, can I re-use the tiles that I removed today? They have a thin layer of the ready mix adhesive which is hopefully drying! If I can still use them, would the back need priming now?
Thanks,
Mark
The history is that having removed the old tiles, the tiles behind those were incredible strong so I had PVA'd the surface before re-tiling. I know that there's two schools of thought regarding PVA, but it was the advice I was given.
The new adhesive was waterproof ready mix from a trade supplier, designed for bathrooms. When I removed the tile today, the new adhesive behind had turned to something like shortcrust pastry, not at all hard. The tiles were quite big (600x200mm). I'm not sure if I'd used too much, and have since read that with larger tiles the ready mix adhesive is not at all suitable as it does not dry. Maybe if I'd left it longer it would have done but after a week it was only the edge couple of mm that was not like pastry!
I've taken all of those tiles off, removed the old adhesive, and this time primed with BAL and bought some dry mix adhesive (Mapei Keraquick Rapid-Set Flexible Tile Adhesive).
So - will the better adhesive solve the problem? Also, can I re-use the tiles that I removed today? They have a thin layer of the ready mix adhesive which is hopefully drying! If I can still use them, would the back need priming now?
Thanks,
Mark