Grout joints for 1000x1000 Porcel-Thin

[P993]

Morning all. Sorry for the ignorant question, but we’re just about to buy some large format 1000x10000 Porcel-Thin, and I was wondering if they can easily take 2mm joints, or would it be better to go for 3mm ?

The tiles will be installed over Ditra, on a screened floor which has a water-pipe based underfloor heating system (ie. not electric).

Read that the TTA recommend 3mm (see image in my reply below), but just wondering if it is easy/feasible to go down to 2mm without causing issues ?

Many thanks in advance for any views.

 

[P993]

 

[Simon Dale]

Morning all. Sorry for the ignorant question, but we’re just about to buy some large format 1000x10000 Porcel-Thin, and I was wondering if they can easily take 2mm joints, or would it be better to go for 3mm ?

The tiles will be installed over Ditra, on a screened floor which has a water-pipe based underfloor heating system (ie. not electric).

Read that the TTA recommend 3mm (see image in my reply below), but just wondering if it is easy/feasible to go down to 2mm without causing issues ?

Many thanks in advance for any views.

We all use 2mm. Ditra no. Isomat or similar is best

 

[P993]

Yes, i wish I’d checked on here beforehand. Unfortunately the Ditra is already down, so to change now would mean taking it all up.

I appreciate it would have been better to go with Isomat, but is Ditra acceptable ? (Lesson learned for next time!).

 

[Simon Dale]

That standard was in 2013 things have moved along very quickly. Your tiles are only 4.6mm thick therefore a 6mm grout depth cant be achieved. Schluter will not guarantee a tile less than 6mm on their mat

 

[Simon Dale]

Might get hanged here. But yes we've all done it

 

[P993]

Ok understood. Is it worth replacing the Ditra then ? Or can I leave it as is ?

 

[Simon Dale]

How deep are your pockets Lol. Just make sure the tiles are well bedded Ragni 316 trowel

 

[Flintstone]

@3_fall is the man to speak to on this matter

 

[Simon Dale]

@3_fall is the man to speak to on this matter

@3_fall Has to go by the book lol