{"id":134683,"date":"2023-11-14T11:45:31","date_gmt":"2023-11-14T11:45:31","guid":{"rendered":"https:\/\/www.pbctoday.co.uk\/news\/?p=134683"},"modified":"2023-11-14T11:45:31","modified_gmt":"2023-11-14T11:45:31","slug":"thermal-performance-actis-eolis-hc","status":"publish","type":"post","link":"https:\/\/www.pbctoday.co.uk\/news\/energy-news\/thermal-performance-actis-eolis-hc\/134683\/","title":{"rendered":"Improving thermal performance with Actis Eolis HC \u2013 ideal for headroom critical projects"},"content":{"rendered":"<h2>A revolutionary new product designed to transform the loft and barn conversion sector can be used in roofs with shallow or uneven rafters and still deliver an excellent thermal performance<\/h2>\n<p>This is in part because the unique configuration of two-in-one reflective insulation and vapour barrier <a href=\"https:\/\/www.insulation-actis.com\/eolis-hc.html\" target=\"_blank\" rel=\"noopener\">Actis Eolis HC<\/a> means that it doesn\u2019t require the usual 25mm air gap required to avoid condensation.<\/p>\n<p>The practice of not leaving an air gap is something of a radical move \u2013 with the standard requirement, under BS 5250, requiring such a gap where high-resistance underlays such as sarking felt are used.<\/p>\n<p><img loading=\"lazy\" decoding=\"async\" class=\"aligncenter wp-image-134691 size-full\" src=\"https:\/\/www.pbctoday.co.uk\/news\/wp-content\/uploads\/2023\/11\/Image-to-accompany-Actis-Nov-piece.png\" alt=\"Actis Eolis HC diagram\" width=\"1306\" height=\"436\" srcset=\"https:\/\/www.pbctoday.co.uk\/news\/wp-content\/uploads\/2023\/11\/Image-to-accompany-Actis-Nov-piece.png 1306w, https:\/\/www.pbctoday.co.uk\/news\/wp-content\/uploads\/2023\/11\/Image-to-accompany-Actis-Nov-piece-300x100.png 300w, https:\/\/www.pbctoday.co.uk\/news\/wp-content\/uploads\/2023\/11\/Image-to-accompany-Actis-Nov-piece-1024x342.png 1024w, https:\/\/www.pbctoday.co.uk\/news\/wp-content\/uploads\/2023\/11\/Image-to-accompany-Actis-Nov-piece-768x256.png 768w, https:\/\/www.pbctoday.co.uk\/news\/wp-content\/uploads\/2023\/11\/Image-to-accompany-Actis-Nov-piece-696x232.png 696w, https:\/\/www.pbctoday.co.uk\/news\/wp-content\/uploads\/2023\/11\/Image-to-accompany-Actis-Nov-piece-1068x357.png 1068w, https:\/\/www.pbctoday.co.uk\/news\/wp-content\/uploads\/2023\/11\/Image-to-accompany-Actis-Nov-piece-1258x420.png 1258w\" sizes=\"auto, (max-width: 1306px) 100vw, 1306px\" \/><\/p>\n<p>&nbsp;<\/p>\n<h3>With Eolis HC, no air gap is required<\/h3>\n<p>But the make-up of <a href=\"https:\/\/www.insulation-actis.com\/eolis-hc\/eolishc.html\" target=\"_blank\" rel=\"noopener\">Eolis HC<\/a> and the configuration of the elements in the recommended build-up in a pitched roof means no such gap is required \u2013 for most locations throughout the UK anyway.<\/p>\n<p>And with every millimetre making a difference in a <a href=\"https:\/\/www.pbctoday.co.uk\/news\/building-control-news\/how-guide-installing-actis-eolis-hc-insulation-loft-barn-converters\/132964\/\">low headroom dwelling<\/a>, that could clinch the viability of a project.<\/p>\n<p>Architect and <a href=\"https:\/\/www.insulation-actis.com\/about-actis.html\" target=\"_blank\" rel=\"noopener\">Actis UK<\/a> and Ireland technical director Thomas Wiedmer explained: \u201cHigh-resistance (HR) underlays usually require a 25mm ventilation gap on their warm side to avoid the risk of interstitial condensation, in accordance with BS 5250. Where ventilation of the air space is reduced then a condensation risk analysis in line with EN 15026, such as a WUFI assessment, needs to be carried out.<\/p>\n<p>\u201cThis dynamic simulation tool analyses the way heat and moisture move through a construction and can be used to assess the risk of moisture accumulation within any part of a roof build-up.<\/p>\n<p>\u201cThe Fraunhofer Institute for Building Physics carried out an assessment using its WUFI software, based on parameters deemed worst-case scenario for UK applications.\u201d<\/p>\n<p>The results of the WUFI assessment, which takes into account all elements of the build-up along with weather data to generate its results, will demonstrate compliance in most locations within the UK.<\/p>\n<h3>Eolis HC will be transformative for loft and barn converters<\/h3>\n<p>Eolis HC will be especially transformative for loft and barn converters dealing with shallow rafters, where headroom is at a premium. It removes the need to cut insulation between each rafter and, while it is thin enough to be used in low headspace zones, it also offers excellent thermal performance.<\/p>\n<p>The Triplex technology on which Eolis HC is based is created from a number of layers of reflective films, each separated by a thin layer of fibre, trapping air between each section, thus boosting thermal performance.<\/p>\n<p>&nbsp;<\/p>\n<p><strong>Actis Insulation<\/strong><\/p>\n<p>Tel: 01249 462888<\/p>\n<p><a href=\"mailto:technical@insulation-actis.com\" target=\"_blank\" rel=\"noopener\">technical@insulation-actis.com<\/a><\/p>\n<p style=\"text-align: left;\"><a href=\"http:\/\/www.insulation-actis.com\" target=\"_blank\" rel=\"noopener\">www.insulation-actis.com<\/a><\/p>\n<p><a href=\"https:\/\/twitter.com\/actisinsulation\" target=\"_blank\" rel=\"noopener\">X<\/a><\/p>\n<p><a href=\"https:\/\/www.linkedin.com\/company\/actis-insulation\" target=\"_blank\" rel=\"noopener\">LinkedIn<\/a><\/p>\n<p><a href=\"https:\/\/www.facebook.com\/actisinsulation\" target=\"_blank\" rel=\"noopener\">Facebook<\/a><\/p>\n<p><em>*Please note: This is a commercial profile.\u00a0<\/em><\/p>\n<div class=\"mk-custom-module-container\">\n<\/div>","protected":false},"excerpt":{"rendered":"<p>A revolutionary new product designed to transform the loft and barn conversion sector can be used in roofs with shallow or uneven rafters and still deliver an excellent thermal performance.<\/p>\n","protected":false},"author":21,"featured_media":0,"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":[307],"tags":[464,430,172727,714,172799],"stakeholder_rel_tag":[172364],"contributor_rel_tag":[],"class_list":{"0":"post-134683","1":"post","2":"type-post","3":"status-publish","4":"format-standard","6":"category-energy-news","7":"tag-contributor-profile","8":"tag-energy-efficiency","9":"tag-featured","10":"tag-heating","11":"tag-pbc-today-november-2023","12":"stakeholder_rel_tag-actis-insulation"},"acf":[],"yoast_head":"<!-- This site is optimized with the Yoast SEO Premium plugin v26.9 (Yoast SEO v26.9) - https:\/\/yoast.com\/product\/yoast-seo-premium-wordpress\/ -->\n<title>Improving thermal performance with 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