Green Building Forum - Between rafter ventilation with PIR roof insulation Sat, 02 May 2026 10:03:50 +0100 https://www.greenbuildingforum.co.uk/newforum/ Lussumo Vanilla 1.0.3 Between rafter ventilation with PIR roof insulation https://www.greenbuildingforum.co.uk/newforum/comments.php?DiscussionID=18026&Focus=304299#Comment_304299 https://www.greenbuildingforum.co.uk/newforum/comments.php?DiscussionID=18026&Focus=304299#Comment_304299 Fri, 17 Nov 2023 22:22:56 +0000 blubb
Related question: I was thinking of installing another 70mm PIR board on top of the rafters. Is that a good idea in terms of ventilation/condensation/dew point?

Many thanks!]]> Between rafter ventilation with PIR roof insulation https://www.greenbuildingforum.co.uk/newforum/comments.php?DiscussionID=18026&Focus=304306#Comment_304306 https://www.greenbuildingforum.co.uk/newforum/comments.php?DiscussionID=18026&Focus=304306#Comment_304306 Sat, 18 Nov 2023 16:08:06 +0000 djh Posted By: blubbon top of the raftersDo you mean on top or underneath?]]> Between rafter ventilation with PIR roof insulation https://www.greenbuildingforum.co.uk/newforum/comments.php?DiscussionID=18026&Focus=304309#Comment_304309 https://www.greenbuildingforum.co.uk/newforum/comments.php?DiscussionID=18026&Focus=304309#Comment_304309 Sat, 18 Nov 2023 17:48:22 +0000 tony Between rafter ventilation with PIR roof insulation https://www.greenbuildingforum.co.uk/newforum/comments.php?DiscussionID=18026&Focus=304314#Comment_304314 https://www.greenbuildingforum.co.uk/newforum/comments.php?DiscussionID=18026&Focus=304314#Comment_304314 Sun, 19 Nov 2023 11:11:46 +0000 djh Posted By: blubbI am planning to create a warm loft]]>