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Protecting crawl space slab foam

user-1105327 | Posted in General Questions on

We have a 4′ crawl space that has eps foam+vapour retarder for a ‘slab.’ what are some cost-efficient options for protecting the foam and poly? i imagine the homeowner will want to use the space for some storage. p.s., concrete is not an option….thanks again, gba!

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Replies

  1. GBA Editor
    Martin Holladay | | #1

    Erik,
    The right answer is "concrete." I'm not sure why you don't like the right answer.

    I suppose you can loose-lay some 4x8 sheets of cement backerboard on top of the foam if you don't like concrete.

  2. user-1105327 | | #2

    thanks for your advice, martin. what about laying down t+g osb directly on the poly? or laying standard edge osb on 2x4 sleepers?

  3. GBA Editor
    Martin Holladay | | #3

    As long as the crawl space floor stays dry, I suppose OSB will work.

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