{"id":50922,"date":"2014-10-22T08:43:44","date_gmt":"2014-10-22T08:43:44","guid":{"rendered":"http:\/\/leedpoints.com\/?guid=46ee1e28379bd47c3c6b6584bcae3770"},"modified":"2014-10-22T08:43:44","modified_gmt":"2014-10-22T08:43:44","slug":"spray-foam-insulated-homes-need-ventilation","status":"publish","type":"post","link":"https:\/\/leedpoints.com\/green-building-blog\/spray-foam-insulated-homes-need-ventilation\/","title":{"rendered":"Spray Foam Insulated Homes Need Ventilation"},"content":{"rendered":null,"protected":false},"excerpt":{"rendered":"<div>\n<div>Subtitle:&nbsp;<\/div>\n<div>\n<div>\n                    Contractors who don&#8217;t ensure adequate ventilation put themselves &mdash; and their customers &mdash; at risk        <\/div>\n<\/p><\/div>\n<\/div>\n<div>\n<div>Images:&nbsp;<\/div>\n<div>\n<div>\n                    <a href=\"http:\/\/www.greenbuildingadvisor.com\/blogs\/dept\/building-science\/spray-foam-insulated-homes-need-ventilation\"><img loading=\"lazy\" decoding=\"async\" src=\"http:\/\/www.greenbuildingadvisor.com\/sites\/default\/files\/imagecache\/blog-river\/Bailes%20-%20ERV%202.jpg\" alt=\"\" title=\"Photo of ERV ductwork in a spray foam insulated home\" width=\"144\" height=\"107\"><\/a>        <\/div>\n<\/p><\/div>\n<\/div>\n<p>Most installations of spray foam insulation, when properly installed, act as an <span>air barrier<\/span><span>Building assembly components that work as a system to restrict air flow through the building envelope. Air barriers may or may not act as a vapor barrier. The air barrier can be on the exterior, the interior of the assembly, or both.<\/span>. When you use it instead of the fluffy stuff (fiberglass, cellulose, cotton), a house will be more airtight. <a href=\"http:\/\/www.energyvanguard.com\/blog-building-science-HERS-BPI\/bid\/23818\/Myth-A-House-Needs-to-Breathe\" title=\"That's good\">That&#8217;s good<\/a>.<\/p>\n<p>When a house is airtight, the nasties in the indoor air tend to stick around. Volatile organic compounds (<span>VOCs<\/span><span>Volatile organic compound. An organic compound that evaporates readily into the atmosphere; as defined by the U.S. Environmental Protection Agency, VOCs are organic compounds that volatize and then become involved in photochemical smog production.<\/span>), water vapor, odors, <span>radon<\/span><span>Colorless, odorless, short-lived radioactive gas that can seep into homes and result in lung cancer risk. Radon and its decay products emit cancer-causing alpha, beta, and gamma particles.<\/span>, and other stuff you don&#8217;t want to immerse yourself in make the home&#8217;s indoor air quality worse.<\/p>\n<p><a href=\"http:\/\/www.greenbuildingadvisor.com\/blogs\/dept\/building-science\/spray-foam-insulated-homes-need-ventilation\" target=\"_blank\">read more<\/a><\/p>\n","protected":false},"author":2,"featured_media":0,"comment_status":"open","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[1],"tags":[4721,12837,3434,8310,5836],"class_list":["post-50922","post","type-post","status-publish","format-standard","hentry","category-green-building-posts","tag-air-sealing","tag-airtight","tag-insulation","tag-mechanical-ventilation","tag-spray-foam"],"_links":{"self":[{"href":"https:\/\/leedpoints.com\/green-building-blog\/wp-json\/wp\/v2\/posts\/50922","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/leedpoints.com\/green-building-blog\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/leedpoints.com\/green-building-blog\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/leedpoints.com\/green-building-blog\/wp-json\/wp\/v2\/users\/2"}],"replies":[{"embeddable":true,"href":"https:\/\/leedpoints.com\/green-building-blog\/wp-json\/wp\/v2\/comments?post=50922"}],"version-history":[{"count":0,"href":"https:\/\/leedpoints.com\/green-building-blog\/wp-json\/wp\/v2\/posts\/50922\/revisions"}],"wp:attachment":[{"href":"https:\/\/leedpoints.com\/green-building-blog\/wp-json\/wp\/v2\/media?parent=50922"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/leedpoints.com\/green-building-blog\/wp-json\/wp\/v2\/categories?post=50922"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/leedpoints.com\/green-building-blog\/wp-json\/wp\/v2\/tags?post=50922"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}