Quote Originally Posted by SkitteryJim View Post
Yes thinking of making the ourside walls a cavity of two qcon blocks 7.5cm wide, with a gap of 5cm this will make the concrete columns inside the house invisible but I still have to but normal blocks up to the Qcon. I do not really want the inside cavity wall normal concrete block.

Cheers

Skittery Jim

Ah, all is clear now!

You would have no problem in butting up the normal to the QCON, and rendering the QCON with their special stuff, and the normal with normal stuff