What is Radon...
Radon is a naturally occurring, odorless, tasteless gas that comes from the decay of Uranium. Elevated levels of Radon, in your home, can become a serious health hazard. It is estimated that about 21,000 people die each year from radon-related lung cancer. Only smoking causes more lung cancer deaths. The EPA recommends taking action to reduce radon in homes that have a radon level at or above 4 picocuries per liter (pCi/L) of air. Radon can enter a home through drains, sump pumps, crawl spaces, and gaps between the foundation and slab.
Radon Mitigation Systems
Many factors go into the design of a Mitigation System for your Home. Every Home is unique. When I arrive, we will walk the home and look at all options for building a Mitigation system, keeping aesthetics and function in mind.
Below are descriptions of Mitigation systems.
Sub Slab Depressurization
Sub slab Depressurization is done by cutting a hole in the slab, removing a minimum 12 gallons of dirt, adding PVC, and sealing it up. Sealing is the key. Sealing creates suction. Gaps between the slab and foundation can hinder suction and need to be sealed.
Sub membrane/Sub Slab Combination
This combination Mitigation system is used when the home has a crawl space and Slab in the basement. A vapor barrier is added, with suction and the suction is hooked to a Sub Slab system.
Sump Pit/Drain Tile Mitigation
Sump Pit mitigation is done by adding suction to the Pit through PVC and is the most effective way to Mitigate Radon. The sump Pit is sealed, creating suction under the slab.
Passive to Active Mitigation
Some builders put Passive Mitigation Systems in their homes. PVC is run from under the slab, through the home, and exhausts above the roof. This method uses "The Stack Effect" to pull Radon from under the slab. While they are effective, sometimes they do not keep levels below 4.0 pCi/L. A fan is added, in the attic, to make the system active.
Sub Membrane Mitigation
Sub Membrane Mitigation is sealing the crawl space dirt with a Radon resistant Vapor Barrier and adding suction under the barrier.
Some homes have a crawl space, but it may be too small to access. Crawl Space Depressurization is done by moving air from one side to the other with a Mitigation fan.