http://forum.lowyat.net/ Mon, 29 Jun 2026 12:09:45 +0800 FeedCreator 1.7.2 http://forum.lowyat.net/topic/3049695 hi, i&#39;m about to install polycarbonate skylight on my pegola. It&#39;s 16ft long x 11ft wide. Rafter spacing is 2ft, until the last one about 2.5ft spacing.<br /><br />so I will install three 16ft pieces: 4ft wide + 4ft wide + 3ft wide.<br /><br />I will need aluminium glazing in between the sheets. Question is, do I just use glazing on top and let the polycarb sit directly on the wood, or should I use a base/bottom glazing also between the polycarb and the wood rafter?<br /><br />I see most installations not using bottom glazing. But in the marklon installation guide, there is both top and bottom.<br /><br />Anyone with installation experience or knowledge can advise? btw I&#39;m using the 3mm embossed type.<br /><br /><a href='http://www.marklon.com.my/ss/installation_maintenance.jsp' target='_blank'>Marklon installation guide</a><br /><br />edit: found another installation example that doesn&#39;t use base/bottom glazing. So what&#39;s the advantage of using it?<br /><br /><a href='http://www.deskylight.com.my/product-polycarbonate' target='_blank'>deskylight site with installation example at bottom of page</a> arglieboy Home Renovations and Interior Design Sat, 30 Nov 2013 22:39:13 +0800