I'm purchasing a shed that I intend to use as a home gym. On delivery, the shed will be uninsulated, aside from the roof which is metal with a bubble underlayment. The floor is a single layer of plywood, so I will likely beef that up with an additional course of plywood/OSB to accommodate the weight of equipment.
I'm going to doing some site prep this week, and plan on putting down a bed of clear gravel. The shed will sit on part of an asphalt drive, and part lawn, so I play on making a level bed of gravel. We're in Ontario, so climate sees a lot of snow and has relatively warm summer. I will probably end up insulating the rest of the shed in the future. It will not be continually heated or AC'ed, but probably will have a bit of heating/cooling it's in use and we're exercising in it during certain seasons.
My question is about vapor barrier/house wrap for the floor. The layers of the shed from added floor to ground will be:
- A. added floor (plywood or OSB).
- B. "factory" floor (SPF plywood, assuming pressure treated).
- C. sleepers the shed sits on, this will be a 4-6" air gap.
- D. gravel
- E. bare ground/pavement
If I was going to add vapour barrier (if advisable), between which layers would I situate it? Getting under the shed before deliver to put a vapour barrier been B&C is unlikely.
Is a moisture transmitting house wrap thing (like Tyvek) more appropriate for this use case?