Crawl Space Drying >> Radon Mitigation

One of the more efficient ways to provide a drying mechanism to a Radon Mitigation is to condition a crawl space by the use of heating and cooling and the crawl space as if the crawl space is just another part of the home. Crawl spaces need to always have a good ground cover that will prevent evaporation from any ground moisture into the crawl space. There are a lot of ways to provide a strong ground cover or liner. Most effective is 6 mil sheet polyethylene that has been taped to the crawl space walls.

  1. This ground cover needs to be a continuous piece through the piers and supports, also the crawl space perimeter walls should be insulated. When insulating the inside of the Radon Mitigation, just like a basement, it is very important not to leave any concrete or masonry exposed in order to control the condensation. It is also necessary to control and condensation at the rim joist locations. This is usually best done when using the rigid type insulation installed either on the outside of the rim joist or inside against the rim joist. A thoroughly sealed, moisture-protected, and completely insulated crawlspace will increase your comfort, save you money on your energy costs, improve the overall durability of your home.
  2. This will help reduce the entry of moisture, radon, and other potential hazardous irritants or pollutants into your home. Whichever method you follow, the keys to an effective Radon Mitigation are of course moisture control by using a water resistant foundation system to drain the rainwater and keep the groundwater away from your foundations. Having and airtight construction that is sealing all of the air leaks between the conditioned crawlspace area and the outside before the insulation installation. Entire insulation coverage by properly installing the proper insulation levels and making sure that the insulation coverage is one piece and complete.
  3. A Radon Mitigation is always susceptible to moisture and other deterioration problems because of the constant contact with the earth. The best practices for preventing these moisture problems will depend on your local climate and style of your construction, but the following rules apply to almost every crawlspace design. First keep all untreated wood building materials away from the ground. Second provide a rain drainage system and Radon Mitigation, like gutters, to take the rainwater away from your house. Third make sure to slope the ground away from your house for at least 5 feet at the very minimum with a 5% grade, in other words 3 inches in a 5 feet distance.
  4. Create drainage channels to direct the rainwater around your house. Fourth add a sill gasket to provide maximum air sealing. Put in a protective membrane, like an EPDM-type protective membrane, to help as a capillary break that will reduce by wicking of the water from the masonry wall. This waterproof membrane, in addition to your metal flashing, will serve as a termite protecting shield. Damp proof the below-grade area of your home’s foundation wall to prevent the outside wall from absorbing any ground moisture by Radon Mitigation.

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