What are the typical problem areas?
Radon concentrations are typically the highest at the lowest point of your home. For many, that area will be the basement or crawlspace. In basements, radon levels will be higher if the area is poorly ventilated, contains an uncovered sump pump or there are cracks in the foundation wall. In crawlspaces, uncovered ground soil is the leading cause of elevated radon levels in the home
While state and national radon maps are useful for seeing regional concentrations of radon, they should never be used to determine whether your house has a radon problem. It’s important to note that radon levels can vary from house to house within a neighborhood. Even next door neighbors could have very different levels of radon. Never assume that your home is safe because surrounding homes don’t have radon issues.
The only way to know for certain if your home has radon problems is with a radon test conducted by a state licensed professional.
What are the types of radon mitigation?
The type of mitigation system used depends on whether your home features a basement or a crawlspace. In a basement, a hole is bored through the concrete slab and a PVC pipe system with a fan is installed to vent the gas from under the slab away from the home. In a crawlspace, the same type of pipe and vent system is installed into the ground soil, but the entire crawlspace will need to be encapsulated with plastic sheeting. Also, if your home has an existing sump pump installed, it can be used in conjunction with a pipe system to mitigate radon from your home.
For both systems, the pipe system has to vent out from the highest point of the home. The pipe system can be installed along the exterior of the home like a gutter system, or the pipe can be routed through the interior of the home and out through the roof – the determining factor here being the amount the homeowner is willing to spend.