Radon Mitigation Procedures
There are certain techniques that are used for almost every type of radon mitigation procedure. They include:
- Sub Slab Depressurization (SSD)
- Drain Tile Depressurization (DTD)
- Sub Membrane Depressurization (SMD)
Sub Slab Depressurization (SSD) Many homes have a “Sub slab depressurization” system, which uses a fan and PVC pipe to draw air from below the basement floor and then release it above the roof. The radon fan creates a vacuum under the basement floor. There is literally no underground air entering the home when the fan is running. This is a very popular choice for radon mitigation.
DTD) Drain tile depressurization is another most commonly used method or reducing the radon levels in the home. This type of system uses the foundation drain lines installed under the concrete floor at the time of construction as a way to reduce the radon in the home. Drawing air from the foundation drain lines, which in most cases will extended around the entire perimeter of the home, will significantly reduce the radon levels in the home. As with other systems, it is very important to seal sump crock opening and cracks or holes in the floor to maximize the operation of the system.
SMD) Sub Membrane Depressurization is installed with a dirt crawlspace. The dirt crawlspace floor will normally be covered with a special plastic that is sealed to the perimeter walls. Next, a tee is placed in the pipe of the SSD system. The piping will go into the crawl space and then through the plastic covering the floor. The fan runs and it draws air from under the membrane covering the floor. This process isn’t as reliable as other methods for radon mitigation. Sump crocks, holes and large cracks in the floor of the basement will be sealed to maximize the performance of a system.