Anti-crack matting and S2 adhesive or is it overkill?

[Walsht3]

Hi guys, 1st post so apologies if I’ve missed any key info.

We’ve had liquid screed laid 2 months ago on top of underfloor heating.

Question: given the screed is in good condition (flat/dry/no undulation), do I need to lay both an anti-cracking matt and use S2 adhesive or will the S2 adhesive suffice?

Or are there other options i.e matting but with a S1 adhesive?

I will be priming the screed once I’ve knocked the underfloor heating off for a couple of days - (I’ve seen this advice/guidance elsewhere on the web.)

Any help would be greatly appreciated. Many thanks. Tom

 

[Dave]

Hi Tom. I always use Schluter Ditra crack mat and S1 adhesive. You don’t need S2 mate. I take it the screed is the fast track drying screed. So 14 days and you can heat/commission the screed.

 

[Walsht3]

Hi Tom. I always use Schluter Ditra crack mat and S1 adhesive. You don’t need S2 mate. I take it the screed is the fast track drying screed. So 14 days and you can heat/commission the screed.

Thanks for the reply Dave. Thats good to know. Yes it’s the fast drying but Ive still had it on at 40degrees with fans and dehumidifier as the weather has been cr*p. I’ll look into the Schluter Ditra

 

[Dave]

Thanks for the reply Dave. Thats good to know. Yes it’s the fast drying but Ive still had it on at 40degrees with fans and dehumidifier as the weather has been cr*p. I’ll look into the Schluter Ditra

Fab. Let us know how you get on.