Active Soil Depressurization
ASD is the most popular type of radon mitigation in Ottawa. It may be installed in your home’s interior, exterior, or slab. A Health Canada study reports an impressive 90.7 percent average reduction in radon levels using this method.
Interior Active Soil Depressurization is a radon mitigation system commonly installed in a basement or attached garage. As part of a sealed system, radon gas either moves up through your home toward a fan located in the attic or to an exit point in one of your sidewalls, paired with a basement fan. This second Ottawa radon mitigation method is simpler and less expensive to retrofit. In either case, the radon fan proceeds to expel radon safely outdoors. All you’ll need to do is occasionally check a monitor to ensure everything is in good working order.
Exterior Active Soil Depressurization functions very similarly to Interior.
The goal is still to draw radon gas out of your home and release it harmlessly into the air. The main difference is that the pipes are installed on the exterior of the house, and the fan is placed at ground level. Here the advantage is that the Ottawa radon mitigation installer will not have to work around your home’s interior layout.
Slab Active Soil Depressurization is suitable for houses built atop a slab-on-grade foundation. Initially, a hole 10-15 cm in diameter is drilled into the slab. After concrete dust and dirt are cleared out of the hole, a PVC pipe is installed leading to your roofline. This pipe will be the conduit that directs radon gas from your foundation level and expels it above the roof.
Crawlspace Sub-Membrane Depressurization
Sub-Membrane Depressurization is the best type of radon mitigation in Ottawa for a house built over a crawl space which has a floor of dirt or gravel. The floor is sealed with a heavy plastic membrane. Then pipes and a radon fan are installed to vent radon gas outside the home, just as with the preceding methods.