As an adjunct to Jacques thread on double brick I was wondering if anyone could enlighten me about the concrete slab wall buildings and why we don't see much of that style in residential building? At least it seems that way in WA. Does this style of building occur in other states? Its used a lot on commercial sites in WA. It seems so darn fast I just wondered whether it is cost effective for residential homes. I realise, you'd need room to the sides of homes to raise the sides up, so it wouldn't suit a lot of blocks, but just curious.