{"id":6638,"date":"2017-11-29T17:00:49","date_gmt":"2017-11-29T17:00:49","guid":{"rendered":"https:\/\/www.bathbespoke.co.uk\/?p=6638"},"modified":"2019-03-11T16:08:33","modified_gmt":"2019-03-11T16:08:33","slug":"u-values-windows-explained","status":"publish","type":"post","link":"https:\/\/www.bathbespoke.co.uk\/2017\/11\/29\/u-values-windows-explained\/","title":{"rendered":"U-values for windows explained"},"content":{"rendered":"<h2>Our guide to U-values for windows<\/h2>\n<p>U-values are becoming increasingly important for architects, builders and homeowners, as the need for energy efficient and sustainable housing becomes more significant.<\/p>\n<p>U-values are a measure of the effectiveness of a material as an insulator. The lower the U-value number, the better the window is at keeping heat inside a building.<\/p>\n<p>The value is measured in watts per square metre per degree Kelvin (W\/m\u00b2K). For example,\u00a0if we took a 12 mm double glazed\u00a0window\u00a0with a\u00a0U-value\u00a0of 2.8, for every temperature degree difference between the inside and outside of the\u00a0window, 2.8 watts will be transmitted every square meter. Basically, the larger the U-value the more energy that is transmitted\/lost from the inside to the outside.<\/p>\n<h2>U-values for windows<\/h2>\n<p>When making a window, it&#8217;s necessary to distinguish between\u00a0U-values\u00a0for\u00a0materials. That being:<\/p>\n<ul>\n<li>U<sub>w<\/sub>\u00a0(the overall U value of the window)<\/li>\n<li>U<sub>g<\/sub>\u00a0(the U-value of the glazing)<\/li>\n<li>U<sub>f\u00a0\u00a0<\/sub>(the U-value of the frame)<\/li>\n<\/ul>\n<p>U<sub>w<\/sub>\u00a0relates to the entire window and\u00a0incorporates the U-values for the glazing and the frame. It&#8217;s influenced by several factors, including the size of the window.\u00a0Larger windows normally feature better values as U-values achieved in glazing are better than in the frame material. Therefore a larger glass area is able to produce a better thermal insulation value.<\/p>\n<p>If you&#8217;d like more information about U values,\u00a0please feel free to <a href=\"https:\/\/www.bathbespoke.co.uk\/contact-us\/\" target=\"_blank\" rel=\"noopener\">get in touch<\/a>.<\/p>\n","protected":false},"excerpt":{"rendered":"<p>Our guide to U-values for windows U-values are becoming increasingly important for architects, builders and homeowners, as the need for energy efficient and sustainable housing becomes more&hellip;<\/p>\n","protected":false},"author":8,"featured_media":1287,"comment_status":"closed","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"_acf_changed":false,"footnotes":""},"categories":[6],"tags":[284],"acf":[],"yoast_head":"<!-- This site is optimized with the Yoast SEO plugin v22.5 - https:\/\/yoast.com\/wordpress\/plugins\/seo\/ -->\n<title>U-values for windows explained | Bath Bespoke<\/title>\n<meta name=\"description\" content=\"Our guide to window U-values - 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