I've been trying for some time now to talk to someone on Weber's technical advice telephone number and so far nothing no one ever answers the bloody phone, it rings and rings and all i get is put to a receptionist whom keeps telling me to keep trying. NOT good enough !!!. So i'm now asking for your help what it is , is i've been asked to price up a job for my local miners club, which is to take down some metal fabrication from the external front wall, fix 25mm external ply boards to the studs, insulate in polystyrene and render over this. I would like to know is this the right way to do this and what to use for the render ?. I'm now going to kick my dog over the frustration of the weber tech no advice phone line and the fact England lost at rugby (again) !!!!!:RpS_cursing:.