Ditra on Anhydrite

[beanz]

Would levelling compound take to foam? Definitely worth a look.
I'm not sure what type of primer it is, to be honest, I've never used an epoxy primer before.. I'm grouting the bathrooms Monday, so will have a look at the primer. Didn't get a chance Friday, as it turned up as we were leaving..

cheers for the help Alan

 

[Ajax123]

Levelling compound will take to foam. Whatever you do though it will be a weak point. Fortunately it's on the edge of the rooms so least traffic area...

 

[beanz]

Levelling compound will take to foam. Whatever you do though it will be a weak point. Fortunately it's on the edge of the rooms so least traffic area...

Nice one, i'll give that a go mate.. Fingers crosseed!

Can all levelling compounds be used with Anhydrite? I've got no idea what's in levelling compound, so no idea if there would be chemical issues!?!?!

 

[stevegun]

Hi di all, new to forum, but have spoken to Alan J in past. I am about to re-lay a kitchen/utility with normal (cheapo if you like) ceramic 300x300 tiles on Gypsum screed, I had to lift the originals (in fact they came up very willingly) as the tiler failed to check moisture levels, and I didn't run wet UFH up before tiling, a fatal combination of tiler not really knowing what he was doing and a self-builder never having installed UFH before, but hey-ho! Anyway having dried the bare screed out over the hot summer, I now need to re-tile before UFH on again in Oct, and from this forum it seems the safest way forward is to use special adhesive e.g. "Gypfix" to fix a de-coupling membrane down, and normal cement adhesive to fix tiles to membrane, with waterproof grout to finish?? I will need to test the final moisture levels before proceeding, especially as an area under the sink got damp with standpipe use before the tiles were originally laid, although no idea where I get a digital hygrometer, can these be hired??

 

[DHTiling]

Hi , Tilemaster do a gypsum based adhesive now... and it seems to be better priced than competitors at present..

Tiletown on the net do good deals.

 

[Ian]

Hi di all, new to forum, but have spoken to Alan J in past. I am about to re-lay a kitchen/utility with normal (cheapo if you like) ceramic 300x300 tiles on Gypsum screed, I had to lift the originals (in fact they came up very willingly) as the tiler failed to check moisture levels, and I didn't run wet UFH up before tiling, a fatal combination of tiler not really knowing what he was doing and a self-builder never having installed UFH before, but hey-ho! Anyway having dried the bare screed out over the hot summer, I now need to re-tile before UFH on again in Oct, and from this forum it seems the safest way forward is to use special adhesive e.g. "Gypfix" to fix a de-coupling membrane down, and normal cement adhesive to fix tiles to membrane, with waterproof grout to finish?? I will need to test the final moisture levels before proceeding, especially as an area under the sink got damp with standpipe use before the tiles were originally laid, although no idea where I get a digital hygrometer, can these be hired??

Try these guys for the hygrometer TR Flooring, Floor covering wholesaler and distributor, Nottingham

They do the F.Ball one for around £100 if I recall correctly, it was last year when it was purchased so don't quote me on the price.

 

[Ajax123]

Digital Floor Hygrometer & Sealing Tape *NEW* - Floor Screeding | eBay

 

[Gazzer]

Good price that .

 

[Ajax123]

Good price that .

never ignore bay and amazon when looking for stuff like this... Some cracking good deals to be had.

 

[Gazzer]

I never do but seeing as I already have one It wasnt something I have been looking for....Now a reasonable priced floor sander is !

 

[Ajax123]

For general floors or specific for anhydrite?

 

[Gazzer]

Anhydrite

 

[stevegun]

Thanks all, hygrometer on e-bay is around 70 notes with delivery, sounds a lot, although cheaper than F. Ball and the likes who want 120+!! Pity these things aren't hireable for say £20, as its a true single use item for a self-builder, and likely to get used once and slung in top of cupboard for years. I have one of the 2 steel points builders moisture meters which give an indication of the level, but guess the hygrometer is only way to be sure?

 

[DHTiling]

It is yes..

 

[Ajax123]

Thanks all, hygrometer on e-bay is around 70 notes with delivery, sounds a lot, although cheaper than F. Ball and the likes who want 120+!! Pity these things aren't hireable for say £20, as its a true single use item for a self-builder, and likely to get used once and slung in top of cupboard for years. I have one of the 2 steel points builders moisture meters which give an indication of the level, but guess the hygrometer is only way to be sure?

no it's not the only way.... You could buy yourself a carbide bomb for £700 or a laboratory oven and control room for say ten grand.... £70 is actually pretty cheap and when you have finished with it you can stick it back on eBay