Is it ok for floor to be constructed in the following way
Sub-base - hardcore + sand
above that kingspan insulation board direct onto sub-base
above that visqueen sheet
above that concrete slab (no screed)
Specifically, I am not sure about PUR insulation board being put directly onto sand - not sure if damp is going to affect it or not.
Sub-base - hardcore + sand
above that kingspan insulation board direct onto sub-base
above that visqueen sheet
above that concrete slab (no screed)
Specifically, I am not sure about PUR insulation board being put directly onto sand - not sure if damp is going to affect it or not.