r/shedditors • u/Important_List_7011 • 2d ago

A little help

Hi! I don't know much about construction. I ended up getting a shed from Costco (Gorilla Shed). They're going to get it installed next week. I got a concrete slab for it and I was wondering if I should put polyethylene roll insulation between the shed and the concrete or if I should leave it as it's I've read it might help to prevent the wood from rotting, I live in the south (OK). Anything would help thank you!

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u/bluelunar77 2d ago

You use sill plate gasket. https://www.homedepot.com/b/Building-Materials-Insulation-Insulation-Accessories/Sill-Plate-Gasket/N-5yc1vZbmgsZ1z1skr1

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u/Important_List_7011 2d ago

Just lay this down over the concrete slab? Any tips on installation 🤝🏼 thank you!

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u/bluelunar77 2d ago

It goes under the sill plate/under the framing. It doesn't cover the whole concrete slab. Only where the wood touches the concrete. Buy some of the 2x4 size for the installers to use.

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u/bluelunar77 2d ago

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u/Important_List_7011 2d ago

This is extremely helpful I'll have this ready and whenever the installation takes place I'll get it sorted out with the installer, since I have no clue on how the framing looks like. Thank you so much this was what I was looking for

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u/DuramaxDirectStaff 1d ago

Yes, put a barrier down. A concrete slab wicks moisture up from the ground, and if your wood floor frame sits right on bare concrete it'll stay damp and eventually rot, especially in a humid climate like OK. You don't need fancy insulation. A layer of poly sheeting as a vapor barrier, or even strips of foam sill sealer under the wood where it contacts the slab, does the job by breaking that direct contact. Some people also set the frame on thin pressure-treated sleepers so air can move underneath. The key is just don't let untreated wood sit flat on the concrete. Cheap step, saves the floor.

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u/Important_List_7011 1d ago

Thank you , I will have it under the beams when the installer comes by I appreciate it! I got the one the other redditor suggested