Moisture Barrier on TOP of concrete floor
stevel_mi
| Posted in General Discussion on
I have created a storage area inside an unheated pole barn. The concrete slab is often damp—a board left on the floor will mildew within a few days. This normally isn’t an issue because there is plenty of air movement everywhere except this storage area. I would love to add a dehumidifier to the storage area but before I do that I clearly need to address the moisture from the floor. I’ve considered a thick plastic sheet with plywood on top, DRIcore, Delta Protec with plywood on top, a rubberized roofing membrane. It is a 12’x12′ area so cost isn’t a huge driver. I want to do something that is effective and doesn’t create more problems down the road. Advice? Many thanks
Replies
You will have plywood soup if you do that. Water will condense out of the concrete under the plywood and you'll have a mess.
I think any of the options you considered would work.
Might want a layer of insulation board in the floor assembly as well.
Details matter. Make sure the moisture barrier is also installed to separate your floor from the bottom of the enclosure wall bottom plate.
You can find waterproof floating floor sold. (some are really waterproof, some just resist water from the top when installed per instructions)
Did you make sure the enclosure you built has treated wood in contact with the floor?
Might also want to place your stuff on pallets or shelves to allow air circulation.