DPC - Recognised Construction Details

[flanagaj]

This is very interesting and although a year later, I am keen what approach you went with.  I too have been banging my head against a brick wall on this topic.  We are having a ground bearing slab and level thresholds.

My plan is to simply follow the detailing for the block and beam Radon barrier protection.  If you swap out the block and beam for a ground bearing slab then why would it not work.  From what I can see, water / damp cannot migrate through the ground into the dwelling and the cavity tray captures any moisture from the cavity and will surely help mitigate and water that did try to breach the cavity.



Can anyone see any reason why that detailing could not be used for membrane above a ground bearing slab?  I want to go membrane above slab, for the simple reason that service penetrations are quite high and to get a decent damp / Radon seal below the 150mm slab will be a complete dog's dinner.