Well this is a weird one. I have some gardeners building my new shed, which is grandly called a summerhouse, but is basically a largish shed. The quote specified pouring and levelling a concrete foundation. I can see from the window of my office (I work at home) that they are building it on top of a few paving slabs. I'm quite stressed at the moment and not up for a fight. Do I have to go and ask where is the bloody poured concrete? Is there any chance they are nailing it together on top of slabs and will pour a foundation afterwards (clutching at straws here)? Does it actually matter?