What is the best adhesive to use for porcelain tiles onto screed

[ashurst]

We have around 50m2 of 120cm x 20cm porcelain floor tiles to lay onto 75mm screed. I understand the tiles should not be laid for at least a couple of weeks after pouring the screed and using ditra matting or similar would be wise. There will also be wet underfloor heating which we may turn on to help dry the screed faster than normal.

What would be the best adhesive to use. My tiler normally uses powder which sets fast. I remember last year when he laid my marble tiles onto ply after a couple of hours we were walking lightly over it and haven't had any problems.

Thanks in advance

 

[Rick-o]

Hi Ashurst, what sort of screed has been poured? Also you mention about your nirmal tiler, are you doing this floor yourself?

 

[Dumbo]

If you are having a poured screed it may well be some sort of gypsum based screed which even if force dried will take more than a couple of weeks to dry out .

 

[ashurst]

He's my builder who has been working for over 20 years and I am happy with his work from the past, (tiling that is)

The floor screed will be cement and sand (builder knows the grade with small stones etc)

The area where he is tiling is very warm. As triple glazed rooflights and bi-folding doors and a kitchen window. It gets to the late 20s even when the temperature is in the low 20s outside

 

[Ajax123]

He's my builder who has been working for over 20 years and I am happy with his work from the past, (tiling that is)

The floor screed will be cement and sand (builder knows the grade with small stones etc)

The area where he is tiling is very warm. As triple glazed rooflights and bi-folding doors and a kitchen window. It gets to the late 20s even when the temperature is in the low 20s outside

sounds like a recipe for cracking and curling to me...

 

[Flintstone]

You sound a little blasé about the screed drying. It needs to be right. Are you using ditra or not ? How come your asking about about adhesive if a tiler is doing the job, he should know.

 

[ashurst]

Why is it a receipe for curling and cracking and I am asking about which is the best adhesive to use. I thought asking professional tilers would be the way to go. We will use ditra. Not every tiler would do things 100% properly like in all professions but by asking in a forum one would normally get a fair idea of what to use. Or am I totally wrong ?

 

[Flintstone]

it's important that you give all the info in order to get the right answers! Imo if you don't trust the tiler, don't use him!

 

[Flintstone]

If you have a screed put down then crank the heating up in a warm room, it's likely to crack and curl up, best left to dry a bit more naturally, at least for a while

 

[ashurst]

Maybe I should of not mentioned all the bits except for just advice on the best adhesive to use on a sand and cement screed.