Insulation on new floor - above or below concrete slab?
Discussion
Just started building an extension out back and I can't decide whether to put the celotex under the concrete slab or above. Both methods are acceptable by building control.
If I put it below the slab, that will make life easier running the pipe work around, and I just lay a 75mm screed on top. Downside doing it this way, it will mean I shall be heating up the slab as well as the rest of the house.
Help, what's the best way?
If I put it below the slab, that will make life easier running the pipe work around, and I just lay a 75mm screed on top. Downside doing it this way, it will mean I shall be heating up the slab as well as the rest of the house.
Help, what's the best way?
ATTAK Z said:
Grandad Gaz said:
ATTAK Z said:
Don't forget to ventilate beneath the beam and block
No, have not forgotten I would have had to extend the vents from the existing suspended wooden floor anyway.How many will I need, roughly? Every couple of metres?
Thanks
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