huangyhg

garage floor slab
i have a 40'x60' garage/storage space over a basement garage/storage in a barn. i realize some attention needs to be paid to resisting oils, salts and water from penetrating the slab and compromising the structural framing, as well as the space below. i've used a concrete topping on a waterproofing membrane over the structural slab in the past, but i'm wondering if this method is overkill. i'm thinking of a concrete sealer/hardener on the structural slab surface, and eliminating the topping and membrane.
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a penetrating sealer should work fine for your purposes. you may also coat the surface, though not necessary.

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