Which way do you do it? - TilersForums.com

[J Sid]

Ditra works on the fact that the adhesive or slc if you wish, doesn't bond to the mat but is lock into it.
if you decide to use slc on top to level the floor or cover ufh wires you will exceed the max aloud, (10mm) between tile a membrane.
as most ufh wires required a 10mm slc over the top Ditra would not work.

 

[Flintstone]

Recommended 10mm of slc over ufh wires ? Not sure that's right

 

[Spare Tool]

Recommended 10mm of slc over ufh wires ? Not sure that's right

Not all recommend that, but Webber spec 10mm

 

[Flintstone]

That's probably so you use more of there gear.

 

[Spare Tool]

Ive just been to see a job in a house I did a floor for a month ago, porc planks on ci matt on 10mm Webber slc over ufh with 6mm ins boards underneath the lot, Webber grout cracking around one tile out of 25sqm....there was a hairline crack in base screed at that exact point, whole lot of levels to get through there but its found its way through, newbuild so think its just settlement, gonna regrout it and see what happens..

 

[hmtiling]

Ive just been to see a job in a house I did a floor for a month ago, porc planks on ci matt on 10mm Webber slc over ufh with 6mm ins boards underneath the lot, Webber grout cracking around one tile out of 25sqm....there was a hairline crack in base screed at that exact point, whole lot of levels to get through there but its found its way through, newbuild so think its just settlement, gonna regrout it and see what happens..

wow! the thermal boards and durabase didn't stop it. doesn't say much for durabase

 

[Flintstone]

It must be some substantial movement!

 

[Spare Tool]

wow! the thermal boards and durabase didn't stop it. doesn't say much for durabase

I was shocked too...I'd only been to see about finishing their bathroom tiling off(the job with the stainless steel trim to remove) and she pulled me up on it..

 

[Spare Tool]

It must be some substantial movement!

What else can it be though? Literally just down one 500mm groutline cracked, all rest of the floor was fine, she said she only saw it cuz she cleans the floor by hand..

 

[Dumbo]

Recommended 10mm of slc over ufh wires ? Not sure that's right

I don't see 10 mm over ufh as a problem providing you got correct smoothing compound. It doesn't self level. Decoupling membranes work better the closer you can get them to the tiles I've been told by schluter.