"AFR explains how concrete slab moisture barriers help control moisture under your foundation & how they are used for foundation maintenance. <br /><br />Keeping the right amount of water in the soil is important for foundation maintenance. <br />With too little water the soils shrink and your foundation goes down. <br />With too much water the soil expands and pushes your foundation up. <br />To help control situations where too much water is entering the soil, engineers sometimes call for the construction of a moisture barrier. <br />The purpose of the moisture barrier is to keep ground water from moving under a foundation. <br />Moisture barriers are vertical barriers buried in the ground that are designed to prevent water from moving through the ground. <br />For example, a barrier might be glued to the side of the foundation, go down a foot, come out three feet and go down another three feet. <br />Moister barriers can also be made out of concrete or any other water proof material that is approved for the purpose.
