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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Our installation by Cook’s installers Eli and Mike was excellent. They were professional and discussed options with us to determine the best place for placement of the system to be both the most efficient and the best pipe placement on the outside of the house. Both were very professional and very friendly guys and their work is neat, clean, and efficient. Blake was spot-on in his original assessment, the job was quoted, and there was no wavering by the company or any attempts to add unnecessary products. Monique did a great job of coordinating the job from start to finish. Thanks to the Cook’s team for a timely response and a great job.
We chose Cook's over their competition because their installation person (Eli) came and not just answered all our questions, but proved to be very knowledgeable offering multiple options. That made the difference over a regular sales person. Our priority (beside reducing the radon levels) was to hide the system from view and they went above and beyond to comply with that request. When I looked at what they did in the attic space, it looked like a masterpiece. We have a bedroom next to the pump in the attic (for which they had to carve out a door), so we were worried about the noise. They told it would be quiet, and it is so quiet that it is unnoticeable. The radon levels went from red to green and they have stayed there for the last month. These are hard working folks who won't disappoint you. THANK YOU!
Great job overall on installing 2 radon systems and encapsulating my basement. They explained what they were doing, why and answered my (many) questions every step of the way. My old house has weird construction and tight spaces that was obviously tedious, but they got the job done. I was very surprised they didn’t up-charge me for the extra day it took to complete the work! Radon dropped from 10.1 to 0.04 so it definitely worked. My only complaint is that there was zero effect on the high humidity in the house, which I’d made clear was as important as lowering the radon levels.
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.
From Yelp
