UFH set-up
I am soon to be laying my underfloor heating in my extension but have a couple of queries.
Is it ok to use non-foil PIR insulation under the screed? I am sure I read on the celotex website that the foil was only necessary if there was an air gap behind the insulation. This would then be covered in polythene before pouring the screed
See from picture that I have 75mm left from top of insulation. Was planning on a traditional sand/cement screed (65-70mm) then leaving 5-10m
Perimeter insulation can be 25mm kingspan / other rigid insulation, but for a thin dry screed you'll need to have some other form of expansion skirting ( applied directly in front of the 25mm upstand ).
Sonething like this is what I use. Shop around for best price .
Liquid screed has a lot of 'after lay' preparation and mechanical cleaning that's needs doing to it before ANYTHING will stick to it ( including primers ). I'd stick with the dry screed TBH, but there are liquid screeds o
