Wed, 10 Jun 2026 09:49:37 +0100 https://www.greenbuildingforum.co.uk/newforum/ Lussumo Vanilla 1.0.3 https://www.greenbuildingforum.co.uk/newforum/comments.php?DiscussionID=16126&Focus=273752#Comment_273752 https://www.greenbuildingforum.co.uk/newforum/comments.php?DiscussionID=16126&Focus=273752#Comment_273752 Tue, 14 May 2019 14:17:40 +0100 mattrgee
Following on from my recent thread regarding the insulation of a suspended timber floor, I have a further question regarding the use of a VCL.

As a recap, I am fitting Celotex between the joists of my suspended timber floor, all joints are being taped resulting in the joist tops also covered.

I had intended to lay a polythene VCL over the Celotex and joists, however, I was advised at the weekend that the foil backing of the Celotex is a VCL in itself and laying a further polythene VCL over the top, could trap moisture. I was consequently advised not to do this.

I have already bought a polythene VCL to lay, so really the question is: will laying it over the Celotex cause an issue or is a second barrier an advantage?]]> https://www.greenbuildingforum.co.uk/newforum/comments.php?DiscussionID=16126&Focus=273754#Comment_273754 https://www.greenbuildingforum.co.uk/newforum/comments.php?DiscussionID=16126&Focus=273754#Comment_273754 Tue, 14 May 2019 16:01:16 +0100 Nick Parsons https://www.greenbuildingforum.co.uk/newforum/comments.php?DiscussionID=16126&Focus=273765#Comment_273765 https://www.greenbuildingforum.co.uk/newforum/comments.php?DiscussionID=16126&Focus=273765#Comment_273765 Wed, 15 May 2019 05:39:31 +0100 tony