Should I Put Plastic Under My Concrete Slab

Should you put a vapor barrier under concrete slabs.

Should i put plastic under my concrete slab.

It will help keep moisture from wicking up through the slab. Vapor barrier under concrete slab slab vapor barrier concrete floor problems building vapor barriers in concrete foundations under slab vapor barriers done right vapor ers necessary for bats. The american concrete institute s guide for concrete floor and slab construction recommends that the thickness of the vapor retarder be at least 10 mils. Aci 302 1 guide for concrete floor and slab construction states that the minimum thickness of an effective vapor barrier is 10 mils.

Almost everywhere except california that slabs are placed on the ground a plastic sheet a vapor barrier is located directly under the concrete slab and on top of the ground photograph 1. Put plastic down and mesh and 4 inches of concrete. Before i poured my basement slab i dumped in the stone and spread it around and let it be for about a year. There s not even a hair line crack in the slab i m with rs i went with the plastic in my garage too.

There are debates about this with varying national regional state and local regulations. Why a plastic vapor barrier under concrete slab mondays with. The american concrete institute states that a vapor retarder should be placed directly under a concrete slab on grade if now or in the future a low permeable membrane floor finish will be installed upon the slab. Thanks for the question.

A concrete vapor barrier is simply a sheet of polyethylene plastic visqueen placed directly on top of the sub grade before the concrete floor or slab is poured to help keep moisture from the soil from passing up through the concrete. This plastic sheet is in direct contact with the concrete as it should be in a rational world. Quality concrete slab design are vapor ers necessary for bats and garages 3 reasons to use crushed stone under concrete slabs b r sand concrete slab floor and how to make one by hand mixing the aggregates the difference between crushed stone and gravel subgrades subbases for concrete slabs the network.