How long to wait until tiling onto 75mm screed

[hmtiling]

Good chance it's Anhydrate or simlar

better chance it's sand cement at that depth. when's the lino forum back btw

 

[Dumbo]

Yeah doesn't mean it couldn't be though.
It's the most commonly used screed these days over UFH And builders as we know don't always follow the rules.
Could just be a fibre reinforced screed but Id want to be sure what I'm dealing with before laying anything.

In answer to the original question With UFH commissioned and running It's possible to dry it out in about two weeks

You shouldn't force dry s&c screed

 

[Sean Kelly]

If time is an issue and cost is not an issue then use Ardex A38 (Ultra Rapid Drying Cement for Internal & External Screeds).

Screed the floor and tile after 4 hours. I believe it works out at 1.5 times more than the cost of normal screed.

I have not used this product myself, I got the info from asking the Ardex reps at a trade day.

 

[Old Mod]

There are several additives/Hydraulic Binders available that can provide you with a dry screed in 48hrs. Mapei topcem being one of them.
Even you can work on @Spacey After 4 days.

http://www.mapei.com/public/GB/products/207_topcem_uk.pdf

 

[Flintstone]

Bet this chap doesn't know if he's coming or going now

 

[ashurst]

Sorry for not replying earlier to clarify.

It will be a sand and cement mix. I honk I will go with the 21 days and ditra or similar. Bal do something called rapid Matt and it's only 1mm thick whereas ditra seems to be 3mm thick. Similar prices. Which should I use ?

 

[J Sid]

ditra will let water out, bal does not. So must be ditra

 

[hmtiling]

Or durabase

 

[NZ_Tiler]

Generally what moisture content should screed have if a decoupling matt is going over?

Would it not be similar to tiling?

IMO 21 days for a screed that thick is not long enough with regular sand n cement.

 

[Dumbo]

If I remember rightly Schluter claim it can be tiled as soon as weight bearing . I stand to be corrected and if I was doing this I would obviously check .