Fri, 14 Aug 2026 16:58:11 +0100 https://www.greenbuildingforum.co.uk/newforum/ Lussumo Vanilla 1.0.3 https://www.greenbuildingforum.co.uk/newforum/comments.php?DiscussionID=18448&Focus=310898#Comment_310898 https://www.greenbuildingforum.co.uk/newforum/comments.php?DiscussionID=18448&Focus=310898#Comment_310898 Sat, 27 Jun 2026 16:02:43 +0100 owlman These large trusses are 70mm x 35mm timber section at 450mm centres and with plenty of length eaves to ridge. I'd seen firms that do long narrow 3g fixed lights for this sort of application. but I'm unsure as to how they'd look from the interior. I'd thought of three in a row on alternate truss spaces with 2 x flat ceiling sections between. It's a pantile roof so flashing detail could get messy. The good news is its N. facing.
Can anyone spot any flaws in my idea? Has anyone attempted skylights in a trussed roof situation and does anyone know of a decent firm who make the lights.]]> https://www.greenbuildingforum.co.uk/newforum/comments.php?DiscussionID=18448&Focus=310899#Comment_310899 https://www.greenbuildingforum.co.uk/newforum/comments.php?DiscussionID=18448&Focus=310899#Comment_310899 Sat, 27 Jun 2026 22:49:31 +0100 WillInAberdeen
I wanted to replace the window but couldn't find a velux style product that was narrow enough to fit.

In the end a joiner made up a new fixed hardwood frame to suit the opening and a local glazing guy (his son!) made up a glazing unit to fit in it, and dressed it with flashings etc. I insulated the light well to match the ceiling.

(Edit: sealing and painting the inside of the light well required some contortions while standing on a stepladder, helps to be skinny!)

It looked fine, before and after!. You don't actually need a big window to bring light in, skylights get more than wall windows do.

Think about whether you need to clean it and if so how.

You probably already looked at those sun tube things? Not bad.

Or yours will probably be ok to cut away parts of one or two trusses to form a bigger opening IF the edges are detailed to carry the loads into the neighbouring trusses which might need to be doubled in that area. Like how a loft hatch is formed. Would be best to ask engineer to detail this and the hole might have to avoid certain points of the truss such as near the eaves or any load bearing internal walls.]]> https://www.greenbuildingforum.co.uk/newforum/comments.php?DiscussionID=18448&Focus=310900#Comment_310900 https://www.greenbuildingforum.co.uk/newforum/comments.php?DiscussionID=18448&Focus=310900#Comment_310900 Sat, 27 Jun 2026 23:18:38 +0100 fostertom https://www.greenbuildingforum.co.uk/newforum/comments.php?DiscussionID=18448&Focus=310902#Comment_310902 https://www.greenbuildingforum.co.uk/newforum/comments.php?DiscussionID=18448&Focus=310902#Comment_310902 Sun, 28 Jun 2026 13:52:58 +0100 owlman https://www.greenbuildingforum.co.uk/newforum/comments.php?DiscussionID=18448&Focus=310907#Comment_310907 https://www.greenbuildingforum.co.uk/newforum/comments.php?DiscussionID=18448&Focus=310907#Comment_310907 Mon, 29 Jun 2026 08:27:16 +0100 tony https://www.greenbuildingforum.co.uk/newforum/comments.php?DiscussionID=18448&Focus=310908#Comment_310908 https://www.greenbuildingforum.co.uk/newforum/comments.php?DiscussionID=18448&Focus=310908#Comment_310908 Mon, 29 Jun 2026 11:40:52 +0100 owlman https://www.greenbuildingforum.co.uk/newforum/comments.php?DiscussionID=18448&Focus=310909#Comment_310909 https://www.greenbuildingforum.co.uk/newforum/comments.php?DiscussionID=18448&Focus=310909#Comment_310909 Mon, 29 Jun 2026 13:53:11 +0100 fostertom https://www.greenbuildingforum.co.uk/newforum/comments.php?DiscussionID=18448&Focus=310910#Comment_310910 https://www.greenbuildingforum.co.uk/newforum/comments.php?DiscussionID=18448&Focus=310910#Comment_310910 Mon, 29 Jun 2026 22:04:45 +0100 Peter_in_Hungary