Moisture Barrier On Concrete Slab

Once the slab is poured the excess moisture must leave the slab in order to strengthen the concrete bond.

Moisture barrier on concrete slab.

Cure with waterproof sheets rather than with water or curing compounds. 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. But consider going with a barrier that has water vapor permeance less than 0 3 perms. All vapor barriers should conform to astm e 1745.

It needs to dry and then stay dry to avoid flooring problems. Sole plates or sill plates are the first pieces of framing lumber placed in home construction. A concrete vapor barrier is any material that prevents moisture from entering a concrete slab. However allowing excess moisture to leave the slab after it s poured is crucial to a successful flooring installation.

Perminator also helps reduce radon gases from entering a building through. Vapor barriers have been associated with certain concrete slab on grade problems including curling and cracking. Perminator vapor barriers help reduce the penetration of moisture and water vapor through the slab and into the building which helps reduce mold fungus and mildew. These principles mean that if the relative humidity in the concrete slab is different than the relative humidity of the air above the slab then moisture is going to try to move in or out of the slab.

Vapor barriers are used because while fresh concrete is poured wet it s not supposed to stay that way. Water is an inherent part of the hydration process of concrete. But they have also proven to be beneficial in reducing failures of moisture sensitive flooring materials adhesives and coatings caused by excessive emission of moisture vapor from concrete slabs. To take it one step further astm e 1745 class a vapor barriers products with less than 0 01 perms are the best approach to protecting your concrete slab and components moisture sensitive floor and iaq from moisture sources below.

Choosing a vapor barrier. Moisture barrier between the sole plate the concrete slab. Meadows 10 and 15 mil vapor barrier. Meadows makes a concrete vapor barrier called perminator.