Moisture Barrier On Concrete Slab

Moisture barrier between the sole plate the concrete slab.

Moisture barrier on concrete slab.

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. Meadows makes a concrete vapor barrier called perminator. A concrete vapor barrier is any material that prevents moisture from entering a concrete slab. Sole plates or sill plates are the first pieces of framing lumber placed in home construction.

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. Choosing a vapor barrier. 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. 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.

However allowing excess moisture to leave the slab after it s poured is crucial to a successful flooring installation. 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. Perminator also helps reduce radon gases from entering a building through. It needs to dry and then stay dry to avoid flooring problems.

Meadows 10 and 15 mil vapor barrier. Water is an inherent part of the hydration process of concrete. Vapor barriers have been associated with certain concrete slab on grade problems including curling and cracking. But consider going with a barrier that has water vapor permeance less than 0 3 perms.

If you want to make sure your slab on ground gets dry and stays dry use a vapor barrier. All vapor barriers should conform to astm e 1745. These plates must be made of pressure. Cure with waterproof sheets rather than with water or curing compounds.