1.0Design Buy Buildhttps://designbuybuild.co.ukJamie Bullockhttps://designbuybuild.co.uk/author/jamie/Rooflight U-values: how they affect building performance and sustainability - Design Buy Buildrich600338<blockquote class="wp-embedded-content" data-secret="fFY0cXYsb5"><a href="https://designbuybuild.co.uk/rooflight-u-values-how-they-affect-building-performance-and-sustainability/">Rooflight U-values: how they affect building performance and sustainability</a></blockquote><iframe sandbox="allow-scripts" security="restricted" src="https://designbuybuild.co.uk/rooflight-u-values-how-they-affect-building-performance-and-sustainability/embed/#?secret=fFY0cXYsb5" width="600" height="338" title="“Rooflight U-values: how they affect building performance and sustainability” — Design Buy Build" data-secret="fFY0cXYsb5" frameborder="0" marginwidth="0" marginheight="0" scrolling="no" class="wp-embedded-content"></iframe><script type="text/javascript"> /*! This file is auto-generated */ !function(c,l){"use strict";var e=!1,o=!1;if(l.querySelector)if(c.addEventListener)e=!0;if(c.wp=c.wp||{},c.wp.receiveEmbedMessage);else if(c.wp.receiveEmbedMessage=function(e){var t=e.data;if(!t);else if(!(t.secret||t.message||t.value));else if(/[^a-zA-Z0-9]/.test(t.secret));else{for(var r,s,a,i=l.querySelectorAll('iframe[data-secret="'+t.secret+'"]'),n=l.querySelectorAll('blockquote[data-secret="'+t.secret+'"]'),o=0;o<n.length;o++)n[o].style.display="none";for(o=0;o<i.length;o++)if(r=i[o],e.source!==r.contentWindow);else{if(r.removeAttribute("style"),"height"===t.message){if(1e3<(s=parseInt(t.value,10)))s=1e3;else if(~~s<200)s=200;r.height=s}if("link"===t.message)if(s=l.createElement("a"),a=l.createElement("a"),s.href=r.getAttribute("src"),a.href=t.value,a.host===s.host)if(l.activeElement===r)c.top.location.href=t.value}}},e)c.addEventListener("message",c.wp.receiveEmbedMessage,!1),l.addEventListener("DOMContentLoaded",t,!1),c.addEventListener("load",t,!1);function t(){if(o);else{o=!0;for(var e,t,r,s=-1!==navigator.appVersion.indexOf("MSIE 10"),a=!!navigator.userAgent.match(/Trident.*rv:11\./),i=l.querySelectorAll("iframe.wp-embedded-content"),n=0;n<i.length;n++){if(!(r=(t=i[n]).getAttribute("data-secret")))r=Math.random().toString(36).substr(2,10),t.src+="#?secret="+r,t.setAttribute("data-secret",r);if(s||a)(e=t.cloneNode(!0)).removeAttribute("security"),t.parentNode.replaceChild(e,t);t.contentWindow.postMessage({message:"ready",secret:r},"*")}}}}(window,document); </script> https://designbuybuild.co.uk/wp-content/uploads/2019/11/Screen-Shot-2019-11-12-at-08.51.15.jpg600374The increasing focus on sustainability across all areas of the construction industry, has led to a raft of marketing campaigns featuring product performance metrics and environmental credentials. The majority of these are factual and backed by testing and independent approvals and ratings. However, there are unscrupulous suppliers making false or exaggerated claims and others presenting confusing messages which blur the facts. Rooflight U-values are a case in point.