Which way do you do it? - Tile Advice

[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.

 

[Flintstone]

I always slc about 5mm, just enough so you can't see the wires, another 5mm onto is basically twice the cost in slc and another 5mm height in the door way that you don't want

 

[Flintstone]

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..

I'm not sure, has it widened the joint?

 

[Spare Tool]

I'm not sure, has it widened the joint?

Something's moving somewhere...bit of a coincidence there was a crack in base at that point though

 

[Flintstone]

Did your bowels move when she said there was a crack in the floor?

 

[Spare Tool]

Did your bowels move when she said there was a crack in the floor?

Haha..not so much after she said grout, she wasn't overly worried about it but tis very strange :|

 

[Old Mod]

I'm quietly convinced I was told on Schluter training course 5mm slc over Ditra was ok, ALTHOUGH not preferable.

 

[Spare Tool]

I'm quietly convinced I was told on Schluter training course 5mm slc over Ditra was ok, ALTHOUGH not preferable.

Sorry turned that well off topic
...but slightly relevant

 

[One Day]

No, the mechanical bond between the ADHESIVE and ditra is lost impish if it's been slc'd

Ok! Mr semantics! You win.
(but I'm still right)

 

[Rookery]

Not all recommend that, but Webber spec 10mm

I think that might be cos they say minimum 10mm thick on a timber floor. I would do it: insulation board/UFH cable/5mm or so slc/tile adhesive/tile
I wouldn't uncouple unless it was stone.

 

[hmtiling]

Ok! Mr semantics! You win.
(but I'm still right)

Hahaha