Thu, 04 Jun 2026 19:18:50 +0100 https://www.greenbuildingforum.co.uk/newforum/ Lussumo Vanilla 1.0.3 https://www.greenbuildingforum.co.uk/newforum/comments.php?DiscussionID=3412&Focus=186710#Comment_186710 https://www.greenbuildingforum.co.uk/newforum/comments.php?DiscussionID=3412&Focus=186710#Comment_186710 Thu, 17 Oct 2013 12:29:43 +0100 Graeme Berry ) and has been used both internally and externally. It has a µ of 5, so 10mm has an sd-value of 0.05 (or 0.25MNs/g if you prefer it that way). To put that in context, the definition for a vapour permeable underlay is 0.25 MNs/g or less.]]>