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Vapor/Moisture Barrier
Posted on 12/3/23 at 6:31 am
Posted on 12/3/23 at 6:31 am
I just bought a resin storage shed and am installing it on a wooden foundation set on concrete blocks. Will be about 6” off the ground. Pressure treated 2x6’s and 3/4” plywood foundation. Do I need to put down plastic for a barrier or would it be better to leave wood uncovered?
Posted on 12/3/23 at 1:28 pm to mdboss
If there is airflow under the wood foundation, I wouldnt install a vapor barrier on top. I built a shop on a wood foundation, on blocks. I used Advantech for the decking and no vapor barrier. Airflow+drying potential is your friend.
Posted on 12/3/23 at 2:35 pm to dragginass
Thanks for your reply. You’ve convinced me to scrap the plastic barrier.
Posted on 12/3/23 at 2:47 pm to mdboss
Be sure the ground is well drained so there is not water under the shed.
Posted on 12/3/23 at 3:14 pm to mdboss
Why not turtle back the ground under the shed so water doesn’t pool, and put the barrier down over the ground? Also, 6” off the ground isn’t much in the way of air flow.
Posted on 12/3/23 at 6:37 pm to mdboss
Not enough airflow. You need a vapor barrier.
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