Firstly, I know that tiling onto bonding isn't recommended - at least not by British Gypsum...
It would be more useful if they said why not - strength? suction? chemical effects?
However, I've stripped the old tiles from my shower and lots of the skim came off. I've very carefully chiselled off the rest of the adhesive/skim and now have what looks (to me anyway) like a pretty good surface. It's pretty flat (with the original plasterer's scratch lines) and seems pretty solid.
I'd rather avoid getting it skimmed, as I'd have to get someone in so this could add weeks of delay. Plus I wonder whether anyone would bother turning up or even talking to me about plastering 6 sqm of wall. The rest of the bathroom is perfect, as only the shower was tiled.
I'm aware of the issue of suction. I was going to tank it anyway. I've just ordered a couple of Mapegum tanking kits (it's a fairly big shower), this includes a primer, liquid membrane and corner tape.
Would the Mapegum tanking kit make it OK to tile onto?
If so then are there challenges in tiling onto this bumpier surface? I was wondering whether it would be an idea to skim over it myself with the adhesive using the flat side of the trowel just to fill the scratches and bumps, let it set then put more on with the combed side and tiles as usual?
I've already learnt from this forum that I can't use a ready-mixed adhesive with the tanking. I'll look for a waterproof powder with an amateur-friendly working time in my local Tile Giant.
All help very much appreciated.
[automerge]1591361152[/automerge]
Some photos attached.
The wall on the right continues out into the bathroom. I was going to start at the opposite corner of the room, working right-to-left into the shower. I was hoping to use extra adhesive here to make up the 2-3mm of skim coat that will be under the rest of them on this wall. Is this likely to succeed, either with or without skimming a layer of adhesive first? I've already shaved down the edge of the skim to turn it from a step into a ramp.
Obviously there are a few holes here and there, these will be filled of course. Any pink skim that's still there is just a stain that was left behind, it does feel a lot flatter than it looks.
It would be more useful if they said why not - strength? suction? chemical effects?
However, I've stripped the old tiles from my shower and lots of the skim came off. I've very carefully chiselled off the rest of the adhesive/skim and now have what looks (to me anyway) like a pretty good surface. It's pretty flat (with the original plasterer's scratch lines) and seems pretty solid.
I'd rather avoid getting it skimmed, as I'd have to get someone in so this could add weeks of delay. Plus I wonder whether anyone would bother turning up or even talking to me about plastering 6 sqm of wall. The rest of the bathroom is perfect, as only the shower was tiled.
I'm aware of the issue of suction. I was going to tank it anyway. I've just ordered a couple of Mapegum tanking kits (it's a fairly big shower), this includes a primer, liquid membrane and corner tape.
Would the Mapegum tanking kit make it OK to tile onto?
If so then are there challenges in tiling onto this bumpier surface? I was wondering whether it would be an idea to skim over it myself with the adhesive using the flat side of the trowel just to fill the scratches and bumps, let it set then put more on with the combed side and tiles as usual?
I've already learnt from this forum that I can't use a ready-mixed adhesive with the tanking. I'll look for a waterproof powder with an amateur-friendly working time in my local Tile Giant.
All help very much appreciated.
[automerge]1591361152[/automerge]
Some photos attached.
The wall on the right continues out into the bathroom. I was going to start at the opposite corner of the room, working right-to-left into the shower. I was hoping to use extra adhesive here to make up the 2-3mm of skim coat that will be under the rest of them on this wall. Is this likely to succeed, either with or without skimming a layer of adhesive first? I've already shaved down the edge of the skim to turn it from a step into a ramp.
Obviously there are a few holes here and there, these will be filled of course. Any pink skim that's still there is just a stain that was left behind, it does feel a lot flatter than it looks.
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