Fri, 14 Aug 2026 22:47:30 +0100 https://www.greenbuildingforum.co.uk/newforum/ Lussumo Vanilla 1.0.3 https://www.greenbuildingforum.co.uk/newforum/comments.php?DiscussionID=1037&Focus=11557#Comment_11557 https://www.greenbuildingforum.co.uk/newforum/comments.php?DiscussionID=1037&Focus=11557#Comment_11557 Mon, 31 Dec 2007 15:21:36 +0000 21grantbridge
First post so please be gentle. I am halfway through a barn conversion. I have basically built a timber framed house inside the existing walls. I have an external breathable vapor barrier between the frame and the stone, which has been repointed on both sides. I have a minimum of 250mm between the inside of the frame and the vapor barrier. Until reading this forum I was going to use a 85/105mm kingspan from seconds and co at a cost of £4.50m2 for the floor, walls and loft. Is this the most cost effective sollution? I am Ok using it for the floor, but having taken in what everybody has said about drafts, and as the product is rigid - how do you make it draft-proof on the walls and ceiling if its going between trusses and frames? I had originally intended to build a floating roof and cross batten it for slating, but as I am reusing all the old slates, which are several different sizes and split if put into dressed battens I had to go for sarking.

put in a few words ... With 250mm to play with and a limited budget what is the most cost effective and if possible green insulation to use?

Any advice greatfully appreciated.

James]]> https://www.greenbuildingforum.co.uk/newforum/comments.php?DiscussionID=1037&Focus=11616#Comment_11616 https://www.greenbuildingforum.co.uk/newforum/comments.php?DiscussionID=1037&Focus=11616#Comment_11616 Tue, 01 Jan 2008 19:57:56 +0000 jamesingram I'd of thought your standard glasswool etc would do the job well for the lowest cost
blown warmcell would be good but I'm not sure of the m2 price, approximately £16m2 supply and fit for 150mm ish
this lot seems to have good prices
http://www.naturalinsulations.co.uk/

£4.50m2 seems a good price for kingspan though. I'm paying double that for 100mm firsts

When I use kingspan etc' , I cut it as best as possible then use a expanding foam gun to fill all the gaps
If you tape a mastic nosel on the end you can cut the end to the size required or squeeze it flat to get into small gaps
once the foams gone hard , take the tape off and it unscrew the nosel, it leave a thread for a new one or clean out the old one and put it back on
leave the the canister on until the finished and replace it straight away that way you never have to clean out the gun.

happy new year

Jim
check out this discussion, might be useful
http://www.greenbuildingforum.co.uk/newforum/comments.php?DiscussionID=829&page=1#Item_0]]>