On Tuesday, September 12, 2017 at 8:44:12 PM UTC-4, Jess123 wrote:
I am buying a steel shed , it has insulation(kingspan) on the inside .. if I
apply treated plywood as the base would I still get condensation ? The shed is
only 7ftx8ft. Please help

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Does it have some vents? Soffit? In the gables or a ridge vent?
Venting is key to avoiding condensation. The ones for sale around
here generally have venting. Plywood floor is fine. Mine has one
and no condensation problems. Of course climate is probably a factor
too.