Category Archives: Radon Mitigation

Research and implementation of our radon mitigation system.

Radon Fan #2

Posted on August 28, 2021 by ellen

Since the new roof was going on it was time to put the hole in for the second radon fan. All this time the fan was in the garage but I was reluctant to try to cut a hole in … Continue reading →

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Radon Proof Sump Cover

Posted on November 6, 2017 by ellen

When we demoed the slab floor we saw that drain pipes were connected from the outside perimeter foundation of the house into the sump tank. We seldom saw water in the sump tank so we were not sure the system … Continue reading →

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Boxing in the Radon Vent

Posted on April 18, 2017 by ellen

Another pre-drywall project that I forgot to list was to box in the radon vent that entered the attic shelf over the storage closet. The vent has a slant to it that meant the lower part was uneven with the … Continue reading →

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Radon Sealing

Posted on July 8, 2016 by ellen

There is a lot of attention to detail that has to be paid during the construction. One requirement of the radon mitigation is to caulk all the penetrations through the slab. Since our water lines and drains do penetrate the … Continue reading →

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Completed Crawlspace!

Posted on December 12, 2014 by ellen

I finished the crawlspace today and replaced all the old pipe insulation with 1″ thick K-Flex R-7 insulation from Supply House. This insulation is a Greenguard certified product for its low VOC and mold resistance. There is over $275 of … Continue reading →

Posted in Air Intrusion/Thermal Envelope, Construction, Energy Efficiency, Radon Mitigation | Comments Off on Completed Crawlspace!

Crawlspace Radon Piping

Posted on December 6, 2014 by ellen

Another thing I am rethinking is the piping that the radon mitigation calls for under the vapor barrier. I stuck a pipe under the vinyl, measuring for connection to the vent pipe and it looked kind of ridiculous. A short … Continue reading →

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Crawlspace “After”

Posted on December 5, 2014 by ellen

The conditioned crawlspace is almost complete. The vinyl tarps/billboards are sealed to the walls with caulk. The low VOC Loctite PL375 is inexpensive and easy to work with. It is both a construction adhesive and gap filling caulk and washes … Continue reading →

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Crawlspace Conditioning

Posted on November 23, 2014 by ellen

We had the initial energy audit done in March of 2012. One of the recommendations in the audit was to condition the crawlspace. “Your crawlspace can cause major air quality and energy issues in your home. The vents in this … Continue reading →

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Slab Radon Pipe Connection

Posted on October 31, 2014 by ellen

We finished tying in one of the slab radon pipes to the crawlspace radon fan today. There were several days of cutting pipes and several days of procrastinating since the pipe is heavy and the cuts are trouble and the … Continue reading →

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Fan (tas) tech Radon Fan

Posted on October 18, 2014 by ellen

In the quest to finish the thermal barrier, I need to go under the house into the crawlspace and lay out a vinyl radon barrier on the ground and seal it to the walls. Working under the house usually means … Continue reading →

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Slab Edge Continued

Posted on September 2, 2013 by ellen

The slab edge had to be sealed against radon. I had decided to use roofing tape (Eternabond Webseal) and after returning to see that the Sanitred had pulled away from the edges of the cement, it was an even more … Continue reading →

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Radon Report

Posted on May 21, 2013 by ellen

I picked up a Radon test while browsing in Home Depot. Just thinking that it might be good to see what the concentration was before I bought expensive radon vent fans and sealed up the sump hole. I followed the … Continue reading →

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Radon Mitigation

Posted on April 19, 2013 by ellen

Zone 1 has the highest concentration of Radon in the ground. Radon has been found to be a naturally occurring cancer causing element that is concentrated in homes that have direct contact with the earth especially in Level 1 (Red) … Continue reading →

Posted in House Systems, LEED Project, Planning, Radon Mitigation | Comments Off on Radon Mitigation