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- 9 Dec 2023
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Hi- newbie here!
I'm looking to install wet UFH as part of a heat pump install.
Floors are suspended timber, with 100mm joists. There's a c.200mm void underneath.
I plan to PIR insulate from bottom of joist up, leaving a 25mm gap for pipe and biscuit mix screed on top of PIR. This will either be through 50mm PIR board on a 25mm batten, or potentially roof soakers at joist level with a 75mm PIR level.
My question is around the edges of the room.... Do the boards need to butt up directly against the wall? Do I need to seal/protect anywhere with a membrane of sorts? If so, where does this go? Under the PIR or on top? (Struggling to find a definitive answer so really welcome views!)
I'm looking to install wet UFH as part of a heat pump install.
Floors are suspended timber, with 100mm joists. There's a c.200mm void underneath.
I plan to PIR insulate from bottom of joist up, leaving a 25mm gap for pipe and biscuit mix screed on top of PIR. This will either be through 50mm PIR board on a 25mm batten, or potentially roof soakers at joist level with a 75mm PIR level.
My question is around the edges of the room.... Do the boards need to butt up directly against the wall? Do I need to seal/protect anywhere with a membrane of sorts? If so, where does this go? Under the PIR or on top? (Struggling to find a definitive answer so really welcome views!)