Simple and proven methods are deployed when a home or building tests positive for high levels of radon gas, defined by the US Environmental Protection Agency as having a tested level of 4.0 pCi/l or higher, (know as the "Action Level"). The most common method is Active Soil Depressurization (ASD). The ASD system utilizes standard PVC piping and specially designed, waterproof, low wattage electric , radon suction fan.
The pipe starts below the foundation of the lowest floor of the structure, through a hole drilled in the concrete slab or the plastic membrane of the crawl space. In the case of a crawl space, additional piping is added under the plastic. The plastic is also permanently attached to the walls. From the this "suction point", the piping is routed up and then out through the rim joist. At this point the radon fan is mounted in an inconspicuous as possible location on the exterior or within attic above the home if possible. In all cases, the fan is located outside or above the "living space" and terminated above the roof line.
We also caulk and seal all major slab cracks and openings in the basement floor. While these efforts only marginally effect radon levels, they are very effective at reducing the loss of conditioned air into the radon reduction system. Sealing also improves the pressure field of the system under a slab.
Radon mitigation systems can reduce radon gas levels in a home by as much as 97%. We have installed a system where the indoor radon radon level was 30.0 pCi/l. After the system was installed and running, tested levels are are under 1.0 pCi/l.
We typically can install a radon mitigation system in a standard home in four to six hours. While we ask for as much advanced notice as possible to schedule a system installation, we generally are able to install a system with 48 to 72 hours notice, and immediately if the situation requires it.
After the system is installed, indoor radon levels begin to drop almost immediately. Formal testing of the system's effectiveness should begin after 24 hours. We test every system we install by providing the end user with a professional radon test kit from the certified Air Chek Labs in Asheville, NC. All our systems are warranted to drop indoor radon levels below the EPA's Action Level of 4.0 pCi/l.
Diagram of a Active Soil Depressurization - Radon and Vapor Intrusion System
Radon Consulting Services
We can assist you with planning a radon resistant home with various options that make your home or addition more radon and vapor resistant. Please use our Contact Us Page to receive more details.
By The Yard Enterprises, LLC
27 Wildwood Drive
Murphy, NC 28906
828-644-9436 bytheyardllc@gmail.com