Membranes
Radon barriers and gas-tight sheet materials for extension floors: when you need one instead of a standard DPM, sealed laps and pipe collars, and the building control hold point before the slab pour.
Radon barriers and gas-tight sheet materials for extension floors: when you need one instead of a standard DPM, sealed laps and pipe collars, and the building control hold point before the slab pour.
