Gypsum screed in a wetroom? - TilersForums.com

[tommyzooom]

I'm on a new house at the moment, 100m of 900x450 porcelain, onto a sand and cement screed. This is phase one, I haven't been asked to price for the bathrooms (Yet)
For some reason, the rest of the house has a gypsum screed, including 3 of the 4 bathrooms. These are not that common over here, but I thought this type of screed was not suitable in a bathroom (one room is a wetroom!!)????
What advice should I arm myself with for when I am asked to quote for them? What prep work is needed? I guess they will need fully tanked? with a paint on tanking? If a membrane, what to stick it to the screed with?

A rip out will be a last resort as it has wet ufh too
tia

 

[Ajax123]

Gypsum screed is not suitable for areas where it will remain permanently wet so itis ok for a bathroom provided it is dried and then kept dry. My advice is be to make certain that once it is dry use a tanking membrane to waterproof it from the top.

I thinki would use ditra in this sort of area as well or something of that nature.

Do you know which gypsum screed itis. There are several in Ireland.

 

[tommyzooom]

No, I'm not sure which it is, but I can find out.
I thought about Ditra, what to stick it down with though?? A gypsum addy i guess would be best underneath, but will be very hard to source over here.

 

[The D]

[video=youtube;TjJHnKw7YNA]http://www.youtube.com/watch?v=TjJHnKw7YNA[/video]

 

[Ajax123]

If the screed is dry and you use a tanking membrane you will stop any sulphate migration so you will be able to stick the ditra down using a cement based flexible adhesive

 

[Ajax123]

[video=youtube;TjJHnKw7YNA]http://www.youtube.com/watch?v=TjJHnKw7YNA[/video]

I love that song. And as for my mate Fred and his bird Rita.....well that is Just class

 

[Peter]

Is this your first gypsum screed you've come across? Yet to see one here myself, be it for tiling or just in general flooring. Hoping they don't catch on here - sounds like a lot of headache.

 

[DHTiling]

They are very popular over here now.

I have done 4 large ones in past 18 months And another in July. So get educated , they ain't going away.

 

[doug boardley]

If the screed is dry and you use a tanking membrane you will stop any sulphate migration so you will be able to stick the ditra down using a cement based flexible adhesive

it'd still need priming though wouldn't it Alan?

 

[tommyzooom]

I've priced a few, including sanding and priming etc, but didn't get any. I assume they were tiled by the uninformed, who fired away!!!!!
Certainly getting more popular,