Residential Radon Mitigation Systems
Customizing a System For Your Home
Residential radon mitigation systems start with getting radon out of your house through a process called soil depressurization. The goal of depressurization is to draw radon-containing gas away from the house foundation before it even gets into the house.
The mechanics of depressurization involve the use of a fan which creates the necessary suction to vent the radon gas to the exterior of the house. This approach is referred to as active soil depressurization (ASD) and constitutes the vast majority of soil depressurization systems that get installed in home today.
Different Techniques for Different Homes
For Homes Built on a Slab
Sub-slab Depressurization involves cutting at least one 4 – 6″ hole through the slab. A small pit is hollowed out beneath the hole and a PVC pipe is inserted. This pipe is routed to a fan that creates a vacuum beneath the slab. A single radon vent pipe is often all that is required in a residence. A general “rule of thumb” suggests the use of one vent pipe for roughly every 2,000 square feet of floor space at ground level. The number of suction points depends on the permeability of the soil beneath the slab and the number of footings within the building.
For Homes with a Crawl Space
Crawl space depressurization helps reduce moisture in the crawl space. A length of perforated pipe is laid on top of the soil running the length of the crawl space. The pipe will collect the radon from beneath the plastic sheeting when connected to a fan. Perforated pipe used to collect soil gas is laid on the floor of the crawl space. A high density, cross laminated polyethylene sheeting is then laid on the soil. This type of sheeting is very durable and resists tearing.
Block-Wall Depressurization
With this method, at least one four to six inch hole is cored (drilled) through the slab. A small pit is hollowed out beneath the hole and a PVC pipe is inserted. This pipe is routed to a fan that creates a vacuum beneath the slab. A single radon vent pipe is often all that is required in a residence. A general “rule of thumb” suggests the use of one vent pipe for roughly every 2,000 square feet of floor space at ground level. The number of suction points depends on the permeability of the soil beneath the slab and the number of footings within the building.
Drain Tile Depressurization
Homes that have sump pumps or French drains for control of rainwater can be effectively mitigated utilizing the sump to collect radon from the underlying soil. Two types of drainage systems can be readily adapted to collect radon from the soil below a house and exhaust it safely outside. When the drainage system includes a sump, a lid with vent piping is placed on the sump pit. A radon fan connected to the vent pipe is used to draw radon from the soil and through the sump, to an outside exhaust point above the home’s roof. When placing a lid on the sump pit, it is important to remember to allow for future removal of the lid to allow servicing of the sump pump.
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Cook’s Radon – Residential Radon Mitigation System
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Interior Routing
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Sub-Membrane Depressurization System (Crawlspace Encapsulation)
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Exterior Routing
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Maintaining Your Radon Reduction System
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After calling and having 4 estimates completed for a radon mitigation system, it was quite clear the top choice was going to be Cooks. From the first call speaking with Monique, the bar was set for other competitors. Monique answered all questions, fully explaining the process and the crew that came out led by Eli were extremely knowledgeable, courteous and cleaned up 100%. My house was built on a crawlspace and my starting radon number was 6.7 pCi/L above the safe level of 4.0. Once the system was installed and another radon test was preformed, my level dropped to a very safe 0.7 pCi/L. I am so glad I called Cooks as part of my starting point for all estimates, I have not been disappointed at all. The communication was what I expected both from Monique and the install team. They are not the highest or the lowest in cost but I feel like they are the best and highly recommend them.
Needed a mitigation system installed and they were absolutely fantastic to work with. Cook’s came out on time and worked diligently to install the system (took about 5 hours total). They were great at explaining to me step by step what they were doing and even let me check parts of the system during the install. They made sure I understand how the system works and how to make sure it’s continuing to work down the road. After the install they gave me a follow up radon test to use to verify the radon levels are down. I’ll be recommending them to anyone I know who needs radon management.
Extremely pleased from quote process with all the questions, through execution of the mitigation system. We were at 6.9 picoC/l and dropped to 0.64. They were able to keep my finished basement clear of the system and still make the mitigation work. Excellent communication and customer service. Highly recommended.
I recently installed a radon mitigation system with Cook’s. From initial testing to system installation to post testing, they are fantastic to work with. The owner is very knowledgeable and great to work with. Most importantly, achiever very low readings after system installed!
From Yelp
