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Understanding Radon Testing | Ask This Old House

In this video, This Old House Host Kevin O’Connor talks about radon testing, safe levels, and mitigation with home technology expert Ross Trethewey. SUBSCRIBE to This Old House: http://bit.ly/SubscribeThisOldHouse. Ross Trethewey explains why homeowners should test for radon and shares a few professional and DIY options. What is Radon? Radon is a naturally occurring radioactive gas produced by the breakdown of uranium. Uranium is found in rocks and soils in the ground, and it rises and uranium decays. It’s everywhere, and not usually a problem, however it can concentrate in a home as it rises. It can cause a range of health issues at unsafe levels, and it’s the leading cause of lung cancer in non-smokers. Radon Testing It’s important to test for radon levels in a home. Today, there are radon test kits that make monitoring radon levels very easy. Short-term test kits monitor the radon levels over three days. The user installs them in their basement and mails them to a test lab after three days. Long-and-short-term electronic radon test. These measure the radon level in the house, providing long-term averages and short-term levels. There are also monitors with particulate matter detectors, as well. Why Use Long-Term Testing? Short-term testing is a quick way to test for dangerous levels. However, long-term tests provide more feedback over a wide range of conditions. Radon is never static, which means its levels peak and subside depending on conditions such as the amount of groundwater pushing it upward, the exhaust fans on in the home, and poor chimney ventilation. What Are Safe Levels? Radon is measured using a unit known as picocuries per liter, or pCi/L. Safe levels of radon are below 4.0 pCi/L. Short-term tests may never reach dangerous levels, but long-term tests can show major peaks that occur in certain conditions. How To Mitigate Radon A popular solution for high radon levels is to install an active sub-slab depressurization system. These systems involve installing a tube below the slab and into the gravel layer, and the tube continues up to the attic where a fan sits. The fan sucks the radon gasses out of the ground and prevents it from seeping into the basement. Where to find it? Radon fans [https://homedepot.sjv.io/EKdm1W] are used in radon mitigation to reduce the concentration of radon gas in a building. Radon electronic testers [https://homedepot.sjv.io/QydoLa] are a great option for continuous radon monitoring. One time radon testing home kits can be obtained through the American Lung Association [https://bit.ly/47FGO0c]. Looking for more step by step guidance on how to complete projects around the house? Join This Old House Insider to stream over 1,000 episodes commercial-free: https://bit.ly/2GPiYbH Plus, download our FREE app for full-episode streaming to your connected TV, phone or tablet: https://www.thisoldhouse.com/pages/st... About Ask This Old House TV: From the makers of This Old House, America’s first and most trusted home improvement show, Ask This Old House answers the steady stream of home improvement questions asked by viewers across the United States. Covering topics from landscaping to electrical to HVAC and plumbing to painting and more. Ask This Old House features the experts from This Old House, including general contractor Tom Silva, plumbing and heating expert Richard Trethewey, landscape contractor Jenn Nawada, master carpenter Norm Abram, and host Kevin O’Connor. ASK This Old House helps you protect and preserve your greatest investment—your home. Follow This Old House: Facebook: http://bit.ly/ThisOldHouseFB Twitter: http://bit.ly/ThisOldHouseTwitter Pinterest: http://bit.ly/ThisOldHousePinterest Instagram: http://bit.ly/ThisOldHouseIG Understanding Radon Testing | Ask This Old House    / thisoldhouse