Green Building Forum - Suspended floor void question Wed, 16 Sep 2026 17:16:04 +0100 https://www.greenbuildingforum.co.uk/newforum/ Lussumo Vanilla 1.0.3 Suspended floor void question https://www.greenbuildingforum.co.uk/newforum/comments.php?DiscussionID=18301&Focus=308539#Comment_308539 https://www.greenbuildingforum.co.uk/newforum/comments.php?DiscussionID=18301&Focus=308539#Comment_308539 Sun, 08 Jun 2025 11:14:39 +0100 mitchino
The floor will be insulated with rock wool suspended on weed fabric, air tight barrier on top & floorboards.

The void is ventilated. I'm thinking there's no need to reseal it?]]> Suspended floor void question https://www.greenbuildingforum.co.uk/newforum/comments.php?DiscussionID=18301&Focus=308540#Comment_308540 https://www.greenbuildingforum.co.uk/newforum/comments.php?DiscussionID=18301&Focus=308540#Comment_308540 Sun, 08 Jun 2025 12:22:25 +0100 Nick Parsons Suspended floor void question https://www.greenbuildingforum.co.uk/newforum/comments.php?DiscussionID=18301&Focus=308541#Comment_308541 https://www.greenbuildingforum.co.uk/newforum/comments.php?DiscussionID=18301&Focus=308541#Comment_308541 Sun, 08 Jun 2025 20:42:01 +0100 tony
Nice the soil is dry]]> Suspended floor void question https://www.greenbuildingforum.co.uk/newforum/comments.php?DiscussionID=18301&Focus=308542#Comment_308542 https://www.greenbuildingforum.co.uk/newforum/comments.php?DiscussionID=18301&Focus=308542#Comment_308542 Mon, 09 Jun 2025 08:42:34 +0100 GreenPaddy
I use a vapour permeable membrane to support the insulation, as it is vapour open, and good tear resistance. There are certain temperature swing weather conditions when condensation can occur on the under face of the insulation, and the VPM helps mitigate this. Fix to the joists with felt tacks (staples as temporary fixing till in place). Use a magnetic tack hammer - so much easier eg https://www.ebay.co.uk/itm/134780987552]]> Suspended floor void question https://www.greenbuildingforum.co.uk/newforum/comments.php?DiscussionID=18301&Focus=308543#Comment_308543 https://www.greenbuildingforum.co.uk/newforum/comments.php?DiscussionID=18301&Focus=308543#Comment_308543 Mon, 09 Jun 2025 10:06:11 +0100 djh Posted By: GreenPaddyUse a magnetic tack hammer - so much easierFascinating! That's what I learned today - who knew such things existed? Thanks :cool:]]> Suspended floor void question https://www.greenbuildingforum.co.uk/newforum/comments.php?DiscussionID=18301&Focus=308545#Comment_308545 https://www.greenbuildingforum.co.uk/newforum/comments.php?DiscussionID=18301&Focus=308545#Comment_308545 Mon, 09 Jun 2025 12:33:37 +0100 owlman Suspended floor void question https://www.greenbuildingforum.co.uk/newforum/comments.php?DiscussionID=18301&Focus=308548#Comment_308548 https://www.greenbuildingforum.co.uk/newforum/comments.php?DiscussionID=18301&Focus=308548#Comment_308548 Mon, 09 Jun 2025 14:42:29 +0100 WillInAberdeen
Took that as a lesson I'd rather not learn by myself....]]>