Someone is going to give me a fairly lightly built wood frame 12 by 20
shed; which I will have to take apart in order to move from rear of
their city lot. Hoping to salvage as much as possible of its material
using own labour and taking time.

Intend to rebuild as a 14 by 24 using additional materials etc. on
posts/ concrete pipe set into concrete, below ground having used this
method several times previously for several sheds and a cabin.

Here it is necessary to go at least 30 inches deep for frost; even if
one places insulation at or just below ground level around each post .

Would like to insulate and vapour barrier the floor while building the
new shed, with a view to perhaps later insulating the walls and
ceiling.

Question: What would be the best method of either supporting say, foam
cut to fit between the floor joists and/or laying insulation some kind
of mesh stapled to bottom of joists, or thin plywood ether nailed
(glued?) up to bottom of joists or laid into joist spaces on some kind
supports. It one of those things that if you don't do it while
building it will be difficult/impossible to do later?

If possible will use closed cell foam in the floor, rather than styro
or glass wool/loose insulation to avoid water/damp retention. Not
more than 8 to 15 inches below bottom edge of floor joists; slightly
sloping ground!

Would very much welcome ideas/advice. Far 'out of the box' suggestions
OK.

Terry

"terry" wrote in message

Question: What would be the best method of either supporting say, foam
cut to fit between the floor joists and/or laying insulation some kind
of mesh stapled to bottom of joists, or thin plywood ether nailed
(glued?) up to bottom of joists or laid into joist spaces on some kind
supports. It one of those things that if you don't do it while
building it will be difficult/impossible to do later?

Wood will rot or possibly be attacked by insects. Either use pressure
treated wood or metal straps as step 2. Step one is to cut the foam for a
pressure fit and put some urethane adhisive on it and press to the bottom of
the floor. As for doing it later, you'd have a heck of a time with 8" of
clearance.