SNIP

Not all sheds are equal - do you know what size framing they
plan to use, which timber is specified for the cladding etc. Does it
include guttering? What type of roof?

And don't forget you'll want the guttering to feed a water butt, you need to
allow for that. It's snowing as I type this (In Dorset!!) but in July you'll
know it makes sense.

Steve