{"id":113044,"date":"2024-03-27T07:37:49","date_gmt":"2024-03-27T07:37:49","guid":{"rendered":"https:\/\/www.pbctoday.co.uk\/news\/?p=113044"},"modified":"2024-03-27T09:56:53","modified_gmt":"2024-03-27T09:56:53","slug":"sustainable-retrofit-solution-secondary-glazing","status":"publish","type":"post","link":"https:\/\/www.pbctoday.co.uk\/news\/building-control-news\/sustainable-retrofit-solution-secondary-glazing\/113044\/","title":{"rendered":"Sustainable retrofit solution: Secondary glazing"},"content":{"rendered":"<h2>With a UK-wide commitment to net zero by 2050 and approximately 5.4m traditional buildings in England alone, there is a lot of work needed to upgrade both building fabrics and fittings<\/h2>\n<p>Replacing existing windows is not always desirable nor permissible, so <a href=\"https:\/\/www.pbctoday.co.uk\/news\/guides-reviews\/secondary-glazing-ebook\/100503\/\" target=\"_blank\" rel=\"noopener noreferrer\">secondary glazing<\/a> can be a very sustainable product choice.<\/p>\n<h3>Retaining embodied carbon<\/h3>\n<p>There is no need to remove existing windows, meaning the embodied carbon is retained and there is no waste going to recycling or landfill. This is subject to frames being in good order or repairable but many period buildings have sound windows.<\/p>\n<h3>Easily reversible<\/h3>\n<p>Most<a href=\"https:\/\/www.pbctoday.co.uk\/news\/industry-insight\/conversion-listed-buildings\/53484\/\" target=\"_blank\" rel=\"noopener noreferrer\"> listed buildings<\/a> cannot replace their existing single glazed windows so, subject to listed building consents, secondary glazing offers an excellent solution as heritage bodies accept it as a reversible adaptation<\/p>\n<h3>Long-lasting<\/h3>\n<p>Single glass does not degrade or fail, and treated aluminium doesn\u2019t corrode so the life expectancy of properly maintained secondary glazing can be substantial. Protected from the main elements and not limited by potential failure of sealed units, the life expectancy of secondary glazing could easily exceed that of modern replacement windows.<\/p>\n<h3>T<a href=\"https:\/\/www.pbctoday.co.uk\/news\/energy-news\/selectaglaze-thermal-performance\/71386\/\" target=\"_blank\" rel=\"noopener noreferrer\">hermally efficient<\/a><\/h3>\n<p>An independent, correctly installed and sealed secondary window frame will minimise air leakage. It also \u2018traps\u2019 an insulating layer of air that can reduce heat loss by 50-75%, depending on the glass specification, with increased U-values and improved EPC and BREEAM ratings.<\/p>\n<p><img loading=\"lazy\" decoding=\"async\" class=\"aligncenter wp-image-113046\" src=\"https:\/\/www.pbctoday.co.uk\/news\/wp-content\/uploads\/2022\/07\/Screenshot-2022-07-11-at-15.18.31-300x190.png\" alt=\"sustainable retrofit \" width=\"663\" height=\"420\" srcset=\"https:\/\/www.pbctoday.co.uk\/news\/wp-content\/uploads\/2022\/07\/Screenshot-2022-07-11-at-15.18.31-300x190.png 300w, https:\/\/www.pbctoday.co.uk\/news\/wp-content\/uploads\/2022\/07\/Screenshot-2022-07-11-at-15.18.31-768x486.png 768w, https:\/\/www.pbctoday.co.uk\/news\/wp-content\/uploads\/2022\/07\/Screenshot-2022-07-11-at-15.18.31-1024x648.png 1024w, https:\/\/www.pbctoday.co.uk\/news\/wp-content\/uploads\/2022\/07\/Screenshot-2022-07-11-at-15.18.31-696x441.png 696w, https:\/\/www.pbctoday.co.uk\/news\/wp-content\/uploads\/2022\/07\/Screenshot-2022-07-11-at-15.18.31-1068x676.png 1068w, https:\/\/www.pbctoday.co.uk\/news\/wp-content\/uploads\/2022\/07\/Screenshot-2022-07-11-at-15.18.31-663x420.png 663w, https:\/\/www.pbctoday.co.uk\/news\/wp-content\/uploads\/2022\/07\/Screenshot-2022-07-11-at-15.18.31.png 1254w\" sizes=\"auto, (max-width: 663px) 100vw, 663px\" \/><\/p>\n<h3>In single-glazed properties<\/h3>\n<p>Around 6% of traditional homes are single glazed, many with windows having architectural features that are desirable and need to be retained. Secondary glazing provides an efficient and sympathetic upgrade whilst maintaining the valuable original designs.<\/p>\n<h3>In double-glazed properties<\/h3>\n<p>An estimated 75% of homes have double glazed windows, many of which have been installed since the 1980s. Early designs for sealed units are much less thermally efficient than those needed to meet current standards and latest sustainability targets. Secondary glazing can provide a simple upgrade to these poorly performing systems.<\/p>\n<h3>Expert\u2019s view on sustainable retrofit solutions<\/h3>\n<p>According to Dr Robyn Pender, senior building conservation adviser at Historic England: \u201cDespite what is commonly thought, secondary glazing is a much more efficient system than double glazing. Double glazing places the two panes of glass close together into a single window frame and stops heat transferring through the narrow gap between the panes either by evacuating the air from the space and creating a vacuum or replacing the air with a low-heat-transfer gas.<\/p>\n<p>&#8220;The combination of vacuums and energy-expensive gases, short lifespans and problems with reuse and recycling mean that \u2018insulated glazing units\u2019 (double and triple glazing) can often fail to deliver true energy or carbon benefits: factoring in the lifecycle costs means they come with a very serious risk of maladaptation (costing more energy and\/or carbon than they save).<\/p>\n<p>&#8220;Early glass was even more energy-intensive than modern glass but even so, a PVC double-glazed window will have cost more energy in one replacement cycle (20 years) than the original window in 200 years.&#8221;<\/p>\n<h3>Selectaglaze prides itself on being a sustainable retrofit supplier<\/h3>\n<p><a href=\"https:\/\/www.pbctoday.co.uk\/news\/stakeholders\/selectaglaze-secondary-window-systems\/49848\/\" target=\"_blank\" rel=\"noopener noreferrer\">Selectaglaze<\/a> not only provides products to improve the performance of other buildings but is fully committed to reducing its own carbon footprint, with the drive towards net zero recognised through Planet Mark Certification. Selectaglaze products are made in the UK and have long life expectancy. 30% of aluminium and 35% of glass come from recycled materials and timber is FSC certified.<\/p>\n<h3>Designing sustainable buildings<\/h3>\n<p>The full <a href=\"https:\/\/nbs.fyi\/Y6Y6qa\" target=\"_blank\" rel=\"noopener noreferrer\">Selectaglaze secondary glazing product range is supported with associated NBS Specifications<\/a>, CAD files and BIM objects for designers wanting to embed the complete data for every aspect of their project helping to assess the project carbon consumption and ongoing maintenance.<\/p>\n<p>Specifying secondary glazing is a complex process and involves a multitude of design, performance and regulatory considerations. Selectaglaze offers free comprehensive consultation on specific projects and a range of RIBA approved CPDs.<\/p>\n<p>&nbsp;<\/p>\n<div class=\"page\" title=\"Page 2\">\n<div class=\"section\">\n<div class=\"layoutArea\">\n<div class=\"column\">\n<p><strong>Selectaglaze<\/strong><\/p>\n<p>Tel: (+44) 01727 837271<\/p>\n<p><a href=\"mailto:enquiries@selectaglaze.co.uk\" target=\"_blank\" rel=\"noopener noreferrer\">enquiries@selectaglaze.co.uk<\/a><\/p>\n<p><a href=\"https:\/\/www.selectaglaze.co.uk\/\" target=\"_blank\" rel=\"noopener noreferrer\"> https:\/\/www.selectaglaze.co.uk\/<\/a><\/p>\n<p><a href=\"https:\/\/twitter.com\/selectaglaze\" target=\"_blank\" rel=\"noopener noreferrer\">X<\/a><\/p>\n<p><a href=\"https:\/\/www.linkedin.com\/company\/selectaglaze-ltd\" target=\"_blank\" rel=\"noopener noreferrer\">Linkedin<\/a><\/p>\n<\/div>\n<\/div>\n<p><em>*Please note: this is a commercial profile<\/em><\/p>\n<\/div>\n<\/div>\n<div class=\"mk-custom-module-container\">\n<\/div>","protected":false},"excerpt":{"rendered":"<p>With a UK-wide commitment to net zero by 2050 and approximately 5.4m traditional buildings in England alone, there is a lot of work needed to upgrade both building fabrics and fittings. Secondary glazing could be the sustainable retrofit solution needed.<\/p>\n","protected":false},"author":17,"featured_media":136743,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"_acf_changed":false,"_monsterinsights_skip_tracking":false,"_monsterinsights_sitenote_active":false,"_monsterinsights_sitenote_note":"","_monsterinsights_sitenote_category":0,"footnotes":""},"categories":[306],"tags":[464,430,172727,23907,586,93645,172815,172774,465],"stakeholder_rel_tag":[172516],"contributor_rel_tag":[],"class_list":{"0":"post-113044","1":"post","2":"type-post","3":"status-publish","4":"format-standard","5":"has-post-thumbnail","7":"category-building-control-news","8":"tag-contributor-profile","9":"tag-energy-efficiency","10":"tag-featured","11":"tag-glazing","12":"tag-insulation","13":"tag-net-zero","14":"tag-pbc-today-february-2024","15":"tag-retrofitting","16":"tag-sustainable-construction","17":"stakeholder_rel_tag-selectaglaze"},"acf":[],"yoast_head":"<!-- This site is optimized with the 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