Hi all I could do with a bit of advice please.... I have just put up a new shed (10 x 14) to use as a sort of hobby room / office. Anyway, I want to insulate it, and make it look a bit less like a shed on the inside. So I thought I'd line the walls and roof with polystyrene and attach thin (say 5 or 6mm) plywood over the polystrene. The polystyrene will fit in between the wooden up rights and will be 50mm thick. The shed itself is installed on 6 x 6 tannelised timbers and is clear of the ground. I want to insulate the floor somewhat, but a bit more strength would be good. I thought about say 2 - 5mm polystyrene sheets and covere with plywood, say 12mm? So the advice bit: Walls & ceiling: is this a good approach? Should I screw or nail the plywood? Floor...is this OK, any other ideas ? Cheers... Adrian (FJ)