{"id":13270,"date":"2017-11-01T11:02:00","date_gmt":"2017-11-01T17:02:00","guid":{"rendered":"https:\/\/scotthomeinspection.com\/?p=13270"},"modified":"2025-01-29T15:39:41","modified_gmt":"2025-01-29T22:39:41","slug":"radon-mitigation-system-maintenance","status":"publish","type":"post","link":"https:\/\/scotthomeinspection.com\/radon-mitigation-system-maintenance\/","title":{"rendered":"Radon Mitigation System Maintenance"},"content":{"rendered":"<div class=\"fusion-fullwidth fullwidth-box fusion-builder-row-1 fusion-flex-container nonhundred-percent-fullwidth non-hundred-percent-height-scrolling\" style=\"--awb-border-radius-top-left:0px;--awb-border-radius-top-right:0px;--awb-border-radius-bottom-right:0px;--awb-border-radius-bottom-left:0px;--awb-flex-wrap:wrap;\" ><div class=\"fusion-builder-row fusion-row fusion-flex-align-items-flex-start fusion-flex-content-wrap\" style=\"max-width:1144px;margin-left: calc(-4% \/ 2 );margin-right: calc(-4% \/ 2 );\"><div class=\"fusion-layout-column fusion_builder_column fusion-builder-column-0 fusion_builder_column_1_1 1_1 fusion-flex-column\" style=\"--awb-bg-size:cover;--awb-width-large:100%;--awb-margin-top-large:0px;--awb-spacing-right-large:1.92%;--awb-margin-bottom-large:0px;--awb-spacing-left-large:1.92%;--awb-width-medium:100%;--awb-spacing-right-medium:1.92%;--awb-spacing-left-medium:1.92%;--awb-width-small:100%;--awb-spacing-right-small:1.92%;--awb-spacing-left-small:1.92%;\"><div class=\"fusion-column-wrapper fusion-flex-justify-content-flex-start fusion-content-layout-column\"><div class=\"fusion-text fusion-text-1\"><p>A question we often get as home inspectors in Colorado is what items are needed for radon mitigation system maintenance.\u00a0 In this post we&#8217;ll cover general visual inspection and maintenance tips you can do as a homeowner to check and maintain your radon system.\u00a0 Before we get to the maintenance steps, let&#8217;s first take a quick look at how a radon mitigation system works.<br \/>\n<script async src=\"https:\/\/pagead2.googlesyndication.com\/pagead\/js\/adsbygoogle.js\"><\/script><br \/>\n<!-- Sidebar --><br \/>\n<ins class=\"adsbygoogle\" style=\"display: block;\" data-ad-client=\"ca-pub-7680704043853444\" data-ad-slot=\"3797085764\" data-ad-format=\"auto\" data-full-width-responsive=\"true\"><\/ins><br \/>\n<script>\n     (adsbygoogle = window.adsbygoogle || []).push({});\n<\/script><\/p>\n<h2>How does a Radon Mitigation System Work:<\/h2>\n<\/div><div class=\"fusion-builder-row fusion-builder-row-inner fusion-row fusion-flex-align-items-flex-start fusion-flex-content-wrap\" style=\"width:104% !important;max-width:104% !important;margin-left: calc(-4% \/ 2 );margin-right: calc(-4% \/ 2 );\"><div class=\"fusion-layout-column fusion_builder_column_inner fusion-builder-nested-column-0 fusion_builder_column_inner_2_3 2_3 fusion-flex-column\" style=\"--awb-bg-size:cover;--awb-width-large:66.666666666667%;--awb-margin-top-large:0px;--awb-spacing-right-large:2.88%;--awb-margin-bottom-large:20px;--awb-spacing-left-large:2.88%;--awb-width-medium:100%;--awb-spacing-right-medium:1.92%;--awb-spacing-left-medium:1.92%;--awb-width-small:100%;--awb-spacing-right-small:1.92%;--awb-spacing-left-small:1.92%;\"><div class=\"fusion-column-wrapper fusion-flex-justify-content-flex-start fusion-content-layout-column\"><div class=\"fusion-text fusion-text-2\"><p>The majority of radon mitigation systems installed are a type referred to as a sub-slab-depressurization-system.\u00a0 Sounds complicated &#8211; but it&#8217;s not.\u00a0 The system basically consists of a fan unit that runs 24 hours a day and creates a pull, or depressurization, to extract radon out of the soil before it has a chance to get into the home.\u00a0 The sub-slab part of the system means it is installed to pull radon gas from below the home &#8211; whether that&#8217;s a basement slab, crawlspace floor, or slab-on-grade construction.\u00a0 And yes, contrary to that old urban-myth, radon can be present in a home whether you have a basement or not &#8211; any home construction can have radon present.<\/p>\n<p>The gas comes up out of the soil and doesn&#8217;t care if you have a basement or crawlspace or slab &#8211; if the radon is elevated in the soil below your home, you&#8217;ll have radon in your home.\u00a0 The typical radon mitigation system is made up of the following components: a fan unit that creates the depressurization; electrical power supplied to the fan; and piping which runs from the fan down to the lowest level of the home and more piping to extend from the fan up to the highest point on the outside of the home to push the radon gas out into the air.\u00a0 There is also typically a manometer device which gives you a visual indication that the system is operating properly.<\/p>\n<\/div><\/div><\/div><div class=\"fusion-layout-column fusion_builder_column_inner fusion-builder-nested-column-1 fusion_builder_column_inner_1_3 1_3 fusion-flex-column\" style=\"--awb-bg-size:cover;--awb-width-large:33.333333333333%;--awb-margin-top-large:0px;--awb-spacing-right-large:5.76%;--awb-margin-bottom-large:20px;--awb-spacing-left-large:5.76%;--awb-width-medium:100%;--awb-spacing-right-medium:1.92%;--awb-spacing-left-medium:1.92%;--awb-width-small:100%;--awb-spacing-right-small:1.92%;--awb-spacing-left-small:1.92%;\"><div class=\"fusion-column-wrapper fusion-flex-justify-content-flex-start fusion-content-layout-column\"><div class=\"fusion-image-element \" style=\"--awb-caption-title-font-family:var(--h2_typography-font-family);--awb-caption-title-font-weight:var(--h2_typography-font-weight);--awb-caption-title-font-style:var(--h2_typography-font-style);--awb-caption-title-size:var(--h2_typography-font-size);--awb-caption-title-transform:var(--h2_typography-text-transform);--awb-caption-title-line-height:var(--h2_typography-line-height);--awb-caption-title-letter-spacing:var(--h2_typography-letter-spacing);\"><span class=\" fusion-imageframe imageframe-none imageframe-1 hover-type-none\"><img decoding=\"async\" width=\"600\" height=\"1066\" alt=\"radon mitigation system exterior\" title=\"radon mitigation system exterior\" src=\"https:\/\/scotthomeinspection.com\/wp-content\/uploads\/2017\/11\/radon-mitigation-system-exterior.jpg\" class=\"img-responsive wp-image-13276\" srcset=\"https:\/\/scotthomeinspection.com\/wp-content\/uploads\/2017\/11\/radon-mitigation-system-exterior-200x355.jpg 200w, https:\/\/scotthomeinspection.com\/wp-content\/uploads\/2017\/11\/radon-mitigation-system-exterior-400x711.jpg 400w, https:\/\/scotthomeinspection.com\/wp-content\/uploads\/2017\/11\/radon-mitigation-system-exterior.jpg 600w\" sizes=\"(max-width: 1024px) 100vw, (max-width: 640px) 100vw, 400px\" \/><\/span><\/div><\/div><\/div><\/div><div class=\"fusion-text fusion-text-3\"><blockquote>\n<p>Did you know roughly 20% of the radon tests we perform on houses with radon systems come back with higher than safe levels? The EPA recommends you get a radon test done regularly. Take advantage of our limited time $100 48 hour radon test for Colorado residents.\u00a0<a href=\"https:\/\/scotthomeinspection.com\/radon-testing-special-offer\/\">Click here to schedule yours today.<\/a><\/p>\n<\/blockquote>\n<h2>Radon Mitigation System Maintenance<\/h2>\n<p>If a radon mitigation system is installed in your home, for the most part the system should take care of itself and require little maintenance or action.\u00a0 There are a few checks you can do to verify that the system is operating and is venting radon gas from the home properly.\u00a0 The following components of a system should be checked and visually verified:<\/p>\n<h3>Radon Fan Unit<\/h3>\n<p>The radon fan is the heart of the system.\u00a0 The fan runs 24\/7 and is constantly extracting radon gas from the soil. Per EPA installation protocol the fan unit is supposed to be mounted either outside the home, in a garage or in an attic.\u00a0 The unit should not be inside the home.\u00a0 If it is inside, you should consider having it relocated outside.\u00a0 The first thing you can do once you have located the fan is just making sure it is actually running.\u00a0 You can place your hand on the fan and you should feel it vibrating.\u00a0 Most fans run fairly quiet, so if you feel vibration it&#8217;s likely working.\u00a0 If the fan is excessively noisy, you may want to have it replaced.\u00a0 Radon fans typically have an average 10 year lifespan, and if the bearings are starting to go the fan will get noisy.\u00a0 If the fan is running, that&#8217;s a good first step in satisfying your radon mitigation system maintenance checklist.<\/p>\n<p>If the fan is not running then there may be an electrical issue with no power supplied to the fan, or the fan may be defective.\u00a0 Often an installer will add a switch inline with the fan, to allow for servicing the fan or system as an easy means of turning off the fan.\u00a0 Or the fan cord may plug directly into an electrical outlet.\u00a0 Lastly, the fan may be run to a dedicated breaker in the electric panel.\u00a0 It may require an electrician&#8217;s help to determine whether proper power is applied to the fan, or to determine whether the fan itself is defective.<br \/>\n<script async src=\"https:\/\/pagead2.googlesyndication.com\/pagead\/js\/adsbygoogle.js\"><\/script><br \/>\n<!-- Sidebar --><br \/>\n<ins class=\"adsbygoogle\" style=\"display: block;\" data-ad-client=\"ca-pub-7680704043853444\" data-ad-slot=\"3797085764\" data-ad-format=\"auto\" data-full-width-responsive=\"true\"><\/ins><br \/>\n<script>\n     (adsbygoogle = window.adsbygoogle || []).push({});\n<\/script><\/p>\n<h3>Radon System Manometer<\/h3>\n<\/div><div class=\"fusion-builder-row fusion-builder-row-inner fusion-row fusion-flex-align-items-flex-start fusion-flex-content-wrap\" style=\"width:104% !important;max-width:104% !important;margin-left: calc(-4% \/ 2 );margin-right: calc(-4% \/ 2 );\">\n<div class=\"fusion-layout-column fusion_builder_column_inner fusion-builder-nested-column-2 fusion_builder_column_inner_2_3 2_3 fusion-flex-column\" style=\"--awb-bg-size:cover;--awb-width-large:66.666666666667%;--awb-margin-top-large:0px;--awb-spacing-right-large:2.88%;--awb-margin-bottom-large:20px;--awb-spacing-left-large:2.88%;--awb-width-medium:100%;--awb-spacing-right-medium:1.92%;--awb-spacing-left-medium:1.92%;--awb-width-small:100%;--awb-spacing-right-small:1.92%;--awb-spacing-left-small:1.92%;\"><div class=\"fusion-column-wrapper fusion-flex-justify-content-flex-start fusion-content-layout-column\"><div class=\"fusion-text fusion-text-4\"><p>Assuming the fan is operating, the next item in a radon mitigation system maintenance plan is to check the built-in manometer.\u00a0 This device is a liquid-filled glass tube, usually with red or blue oil liquid in it, and a number scale with a small air tube going from the manometer into the radon pipe.\u00a0 The manometer is usually mounted on the radon pipe near the point where it penetrates into the basement slab or in the crawlspace above the vapor barrier or below the fan unit somewhere.\u00a0 The purpose of this device is to visually display whether the pipe is being depressurized by the fan.<\/p>\n<p>The reading of this manometer should be above zero, indicating the fan is working and depressurizing the pipe as it comes out of the ground.\u00a0 There is not a set level for these readings &#8211; it will vary by the system installed and the size of the fan, length of piping, etc.\u00a0 As long as some reading is present, then the fan is depressurizing the system.\u00a0 The oil-based liquid can dry up in these manometers over time, so if the liquid is missing or dried out, you can replace the liquid.\u00a0 The complete manometer kits are also available for purchase if broken.<\/p>\n<\/div><\/div><\/div><div class=\"fusion-layout-column fusion_builder_column_inner fusion-builder-nested-column-3 fusion_builder_column_inner_1_3 1_3 fusion-flex-column\" style=\"--awb-bg-size:cover;--awb-width-large:33.333333333333%;--awb-margin-top-large:0px;--awb-spacing-right-large:5.76%;--awb-margin-bottom-large:20px;--awb-spacing-left-large:5.76%;--awb-width-medium:100%;--awb-spacing-right-medium:1.92%;--awb-spacing-left-medium:1.92%;--awb-width-small:100%;--awb-spacing-right-small:1.92%;--awb-spacing-left-small:1.92%;\"><div class=\"fusion-column-wrapper fusion-flex-justify-content-flex-start fusion-content-layout-column\"><a class=\"awb-lightbox awb-lightbox-1\" href=\"https:\/\/scotthomeinspection.com\/wp-content\/uploads\/2017\/11\/radon-mitigation-system-meter.jpg\" data-caption=\"The liquid in the meter or manometer should be offset when pressure is active.\" data-rel=\"iLightbox\"><img decoding=\"async\" src=\"https:\/\/scotthomeinspection.com\/wp-content\/uploads\/2017\/11\/radon-mitigation-system-meter-300x200.jpg\" alt=\"Radon Mitigation System Meter\"><\/a><\/div><\/div><\/div><div class=\"fusion-builder-row fusion-builder-row-inner fusion-row fusion-flex-align-items-flex-start fusion-flex-content-wrap\" style=\"width:104% !important;max-width:104% !important;margin-left: calc(-4% \/ 2 );margin-right: calc(-4% \/ 2 );\"><div class=\"fusion-layout-column fusion_builder_column_inner fusion-builder-nested-column-4 fusion_builder_column_inner_1_3 1_3 fusion-flex-column\" style=\"--awb-bg-size:cover;--awb-width-large:33.333333333333%;--awb-margin-top-large:0px;--awb-spacing-right-large:5.76%;--awb-margin-bottom-large:20px;--awb-spacing-left-large:5.76%;--awb-width-medium:100%;--awb-spacing-right-medium:1.92%;--awb-spacing-left-medium:1.92%;--awb-width-small:100%;--awb-spacing-right-small:1.92%;--awb-spacing-left-small:1.92%;\"><div class=\"fusion-column-wrapper fusion-flex-justify-content-flex-start fusion-content-layout-column\"><\/div><\/div><div class=\"fusion-layout-column fusion_builder_column_inner fusion-builder-nested-column-5 fusion_builder_column_inner_1_3 1_3 fusion-flex-column\" style=\"--awb-bg-size:cover;--awb-width-large:33.333333333333%;--awb-margin-top-large:0px;--awb-spacing-right-large:5.76%;--awb-margin-bottom-large:20px;--awb-spacing-left-large:5.76%;--awb-width-medium:100%;--awb-spacing-right-medium:1.92%;--awb-spacing-left-medium:1.92%;--awb-width-small:100%;--awb-spacing-right-small:1.92%;--awb-spacing-left-small:1.92%;\"><div class=\"fusion-column-wrapper fusion-flex-justify-content-flex-start fusion-content-layout-column\"><\/div><\/div><\/div><div class=\"fusion-text fusion-text-5\"><h3>Radon Piping Condition<\/h3>\n<p>Assuming the fan is operating and the manometer appears to indicate the system is depressurizing, the next step in your radon mitigation system maintenance plan is to verify that the piping throughout the system is intact and not damaged.\u00a0 The interior piping, typically white PVC, should run to the lowest level in a home, and penetrate below the slab or below the vapor barrier in a crawlspace.\u00a0 Verify that the piping is not damaged or separated at the seams.\u00a0 If the piping penetrates a concrete slab, the edge should be caulked and sealed around the edge of the pipe and concrete.\u00a0 If separated or cracking, re-caulk as needed.<\/p>\n<p><a href=\"https:\/\/scotthomeinspection.com\/wp-content\/uploads\/2017\/11\/radon-mitigation-system-through-the-slab.jpg\"><img decoding=\"async\" class=\"alignnone size-medium wp-image-13278\" src=\"https:\/\/scotthomeinspection.com\/wp-content\/uploads\/2017\/11\/radon-mitigation-system-through-the-slab-300x300.jpg\" alt=\"radon mitigation system through the slab\" width=\"300\" height=\"300\" srcset=\"https:\/\/scotthomeinspection.com\/wp-content\/uploads\/2017\/11\/radon-mitigation-system-through-the-slab-66x66.jpg 66w, https:\/\/scotthomeinspection.com\/wp-content\/uploads\/2017\/11\/radon-mitigation-system-through-the-slab-150x150.jpg 150w, https:\/\/scotthomeinspection.com\/wp-content\/uploads\/2017\/11\/radon-mitigation-system-through-the-slab-200x200.jpg 200w, https:\/\/scotthomeinspection.com\/wp-content\/uploads\/2017\/11\/radon-mitigation-system-through-the-slab-300x300.jpg 300w, https:\/\/scotthomeinspection.com\/wp-content\/uploads\/2017\/11\/radon-mitigation-system-through-the-slab-400x400.jpg 400w, https:\/\/scotthomeinspection.com\/wp-content\/uploads\/2017\/11\/radon-mitigation-system-through-the-slab-600x600.jpg 600w, https:\/\/scotthomeinspection.com\/wp-content\/uploads\/2017\/11\/radon-mitigation-system-through-the-slab-768x768.jpg 768w, https:\/\/scotthomeinspection.com\/wp-content\/uploads\/2017\/11\/radon-mitigation-system-through-the-slab-800x800.jpg 800w, https:\/\/scotthomeinspection.com\/wp-content\/uploads\/2017\/11\/radon-mitigation-system-through-the-slab.jpg 1000w\" sizes=\"(max-width: 300px) 100vw, 300px\" \/><\/a><\/p>\n<p>You may see that the piping enters a sump pit. This is typical in many areas and the perimeter drain system that drains into the sump pit is used to as part of the radon system.\u00a0 In that case, the sump pit should have a solid cover installed and should be sealed around the edges and the pipe sealed where it enters the sump.\u00a0 Reseal as needed.\u00a0 If a crawlspace is present, a plastic sheet vapor barrier is\u00a0typically installed over the dirt floor of the crawlspace and sealed all around the edges.\u00a0 The radon pipe penetrates through and under the vapor barrier.\u00a0 Ensure that the vapor barrier is not split or torn in any areas, and that the pipe is sealed well to the vapor barrier.\u00a0 Tape can be used to seal the vapor barrier as needed.<\/p>\n<h3>Exterior Piping Condition<\/h3>\n<p>Next steps in your radon mitigation system maintenance plan is to check the outside piping.\u00a0 Per EPA protocol, the exterior piping where radon is vented from the system should exit at the top of the home, above the eave.\u00a0 We typically see piping extend up the side of the home and route outward around the soffit and gutter, venting above the roof edge.\u00a0 Occasionally we see a system that doesn&#8217;t extend all the way up the wall, but as long as it doesn&#8217;t vent near an operable window, that is acceptable.\u00a0 You don&#8217;t want radon being vented from the lower level, then just blowing back into the home through an open window.\u00a0 Make sure this piping is in good condition and the exit point is not blocked in any way.<\/p>\n<p>Those are the key items to verify for your radon mitigation system maintenance.\u00a0 All of these steps can tell you if it appears the system is operational and in good condition.\u00a0 But nothing can tell you if the radon levels in the home are being kept low aside from a radon test.<\/p>\n<h2>Radon Testing Information<\/h2>\n<p>The only way to know for certain that your radon mitigation system is operating properly is to have a radon test done.\u00a0 And the EPA recommends that testing be done every 2 years to verify radon levels in the home, and to ensure that your mitigation system is operating properly.\u00a0 At Scott Home Inspection we perform 48 hour short term radon testing in Colorado per the EPA guidelines.\u00a0 For more information <a href=\"https:\/\/scotthomeinspection.com\/radon-test\/\">visit our radon testing page<\/a>.\u00a0 For additional general radon information <a href=\"https:\/\/www.epa.gov\/radon\" target=\"_blank\" rel=\"noopener noreferrer\">visit the EPA Radon website<\/a>.\u00a0 For help with Radon Mitigation System Installation or Repair, visit our friends at <a href=\"http:\/\/absoluteradonsafety.com\/\" target=\"_blank\" rel=\"noopener noreferrer\">Absolute Radon Safety<\/a>.<br \/>\n<script async src=\"https:\/\/pagead2.googlesyndication.com\/pagead\/js\/adsbygoogle.js\"><\/script><br \/>\n<!-- Sidebar --><br \/>\n<ins class=\"adsbygoogle\" style=\"display: block;\" data-ad-client=\"ca-pub-7680704043853444\" data-ad-slot=\"3797085764\" data-ad-format=\"auto\" data-full-width-responsive=\"true\"><\/ins><br \/>\n<script>\n     (adsbygoogle = window.adsbygoogle || []).push({});\n<\/script><\/p>\n<\/div><\/div><\/div><\/div><\/div>\n","protected":false},"excerpt":{"rendered":"","protected":false},"author":1,"featured_media":13279,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[853],"tags":[],"class_list":["post-13270","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-radon-info"],"nelio_content":{"autoShareEndMode":"never","automationSources":{"useCustomSentences":false,"customSentences":[]},"efiAlt":"","efiUrl":"","followers":[1,2,18],"highlights":[],"isAutoShareEnabled":true,"networkImageIds":[],"permalinkQueryArgs":[],"series":[],"suggestedReferences":[]},"yoast_head":"<!-- This site is optimized with the Yoast SEO Premium plugin v18.1 (Yoast SEO v27.2) - 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