Concrete shed base question

[Richard]

How much larger than the shed size should I set out the concrete base.

[Andrew Mawson]

It depends entirely on the shed construction. With some you want the base to be the exact size of the frame, with the cladding (shiplap or whatever) overlapping the base - in which case the base needs to stand high enough to stop water splash problems.

(Often there is minimal headroom in standard sheds, and a solution is to lay a course of bricks on which to stand the shed)

If your slab is bigger than the shed you need to gaurd against rain falling onto it and running inside

Andrew Mawson