Crispy-Wombat

Thanks for the comments. I’ve not had much to do with BC besides the foundation inspection and just before I poured the slab. I did ask the question by email but seem unable to get a simple yes/no 🤣 “The attached pic is a typical drawing. You will need to fit cavity trays where there are any door or window openings.” I’ve no real issue adding the tray at DPC, as pointless as it seems, given the rest of the house does not. Pretty much all the Youtube/Instagram builds I scoped out prior to the project don’t seem to include it which is what makes me question it.

Hey, I’m looking for some advice on cavity trays at DPC on an extension I’m building, really, I want to know if/when they are a requirement. It’s shown on the BR drawings but the diagram used seems to be fairly generic. The construction will be brick/90mm T&G PIR/block. Not in a high radon area. Chris