Green Building Forum - external shading to prevent solar gain overheating Tue, 19 Dec 2023 08:30:38 +0000 http://www.greenbuildingforum.co.uk/newforum/ Lussumo Vanilla 1.0.3 external shading to prevent solar gain overheating http://www.greenbuildingforum.co.uk/newforum/comments.php?DiscussionID=17874&Focus=302108#Comment_302108 http://www.greenbuildingforum.co.uk/newforum/comments.php?DiscussionID=17874&Focus=302108#Comment_302108 Thu, 22 Jun 2023 14:24:45 +0100 maxsm I'm also interested in whether there are any external blind options for rooflights as the project involves a loft conversion. I'm hoping someone on this forum can advise on their experiences with these options, and names of possible manufacturers. Cost is also a factor so maybe that rules out the motorised blinds?
Thanks in advance for any advice, M]]> external shading to prevent solar gain overheating http://www.greenbuildingforum.co.uk/newforum/comments.php?DiscussionID=17874&Focus=302110#Comment_302110 http://www.greenbuildingforum.co.uk/newforum/comments.php?DiscussionID=17874&Focus=302110#Comment_302110 Thu, 22 Jun 2023 15:46:36 +0100 djh Posted By: maxsmour dreams of floor to ceiling South facing glass will lead to overheating. I understand external shading is the best way to tackle thisCorrect and correct.
we are looking at either motorised external blinds or some form of brise soleil (ideally retractable)
Why do you need a retractable brise soleil? If placed the correct height above the window and of the correct width they are automatic in operation. They allow full sun into the room in winter and block the entire sun in summer. Calculate dimensions for the brise soleil so April is right on the edge. I finally put one up last year - just the aluminium frame for it and put some hessian over the top, which I've left for now because it works so well.

Blinds depend on the type of window you have. Are they outward or inward opening? Or fixed? Flyscreens are moderately effective as sunscreens as well. We got them from streme. Internal honeycomb blinds also work surprisingly well, because although the heat is inside the house, it transfers to the air in the house and is exhausted by the MVHR a lot more easily than if the sun shines on the floor and walls, or furniture etc.

edit: to add that PHPP has a summer overheating worksheet, so if it's possible to run that it may give you a better idea of the size of the problem and whether any proposed fixes are likely to be effective. Other packages may do a similar job; I just don't know.]]> external shading to prevent solar gain overheating http://www.greenbuildingforum.co.uk/newforum/comments.php?DiscussionID=17874&Focus=302111#Comment_302111 http://www.greenbuildingforum.co.uk/newforum/comments.php?DiscussionID=17874&Focus=302111#Comment_302111 Thu, 22 Jun 2023 16:16:26 +0100 fostertom external shading to prevent solar gain overheating http://www.greenbuildingforum.co.uk/newforum/comments.php?DiscussionID=17874&Focus=302125#Comment_302125 http://www.greenbuildingforum.co.uk/newforum/comments.php?DiscussionID=17874&Focus=302125#Comment_302125 Fri, 23 Jun 2023 12:27:11 +0100 maxsm