Advise on laying 100m2 over piped ufh

[Torfaen tiling]

Hi all
I've recently quoted on laying 100m2 of porcelain throughout the ground floor of a house renovation. There is piped ufh and it has tarmac belitex screed over the top.
I have included laying ditra throughout but not expansion joints.
This will be my first floor of this size so I have a few questions:-
Are expansion joints still required with ditra?
Is ditra even necessary?
Could expansion joints and an S2 adhesive be an alternative option?? Cheers

 

[J Sid]

Can't use S2 with ditra
Yes must, must must have expansion joints

Don't know the screed being used, you must researched it an you post a link please.

Very brave taking on a job this size as a first one

 

[Torfaen tiling]

Can't use S2 with ditra
Yes must, must must have expansion joints

Don't know the screed being used, you must researched it an you post a link please.

Very brave taking on a job this size as a first one

Thanks, yes I have looked at the data sheet and it mentions priming and expansion joints every 25m2
I was thinking either S1 on ditra or S2 directly onto the screed. Just wondering what other options are out there.

 

[J Sid]

What size and thickness are the tiles?

 

[Dave]

Belitex is a good screed.
is it a whole area as one or broken into different rooms etc. ?

 

[Torfaen tiling]

It will flow through different rooms but the bulk of it is 1 large kitchen diner extension.

The customer hasn't chosen the tiles yet but I think they are swaying towards large format natural stone effect porcelain.
I'm thinking of expansion joints at door ways if possible.

 

[Dave]

It will flow through different rooms but the bulk of it is 1 large kitchen diner extension.

The customer hasn't chosen the tiles yet but I think they are swaying towards large format natural stone effect porcelain.
I'm thinking of expansion joints at door ways if possible.

If the screed was poured correctly, then there should be expansion joints in the doorways , either way still insert them. Have any joints been put in the main area ?

And has the screed been commissioned with heat.

 

[Torfaen tiling]

OK thanks Dave the screed was only laid yesterday so it hasn't been commissioned yet. I will need to pop back out and see if they have used any expansion joints if so follow those joints I take it?
Would you use ditra/durabase Dave??

 

[Dave]

Di

OK thanks Dave the screed was only laid yesterday so it hasn't been commissioned yet. I will need to pop back out and see if they have used any expansion joints if so follow those joints I take it?
Would you use ditra/durabase Dave??

Ditra all day long and yes follow the joints.
That brand of screed requires 21 days before commissioning, they can crack , so anti crack mat is essential IMHO.
Ive tiled a few and they dry really quickly once heating is on.

 

[Torfaen tiling]

OK thanks Dave I won't be starting it until Feb so it's got plenty of time to cure 👍🏼

 

[Dave]

OK thanks Dave I won't be starting it until Feb so it's got plenty of time to cure 👍🏼

Keep us updated plz.