About to start fixing PIR insulation sheets across the inside of the timber frame. Need a method of ceiling the foil on the PIR to the concrete slab (will have no screed). The foil of the PIR will be taped to form the VCL.
Timber frame company said they would normally prime the concrete slab with PVA, then use tape to seal this to the foil on the PIR - I'm assuming this is standard aluminium foil tape. Has anybody done this?
Are there any alternative approaches for ensuring an airtight seal at this junction?