Green Building Forum - Embodied carbon, EWI, CWI, ASHP, Exposure zone 4 Sun, 13 Sep 2026 20:13:11 +0100 https://www.greenbuildingforum.co.uk/newforum/ Lussumo Vanilla 1.0.3 Embodied carbon, EWI, CWI, ASHP, Exposure zone 4 https://www.greenbuildingforum.co.uk/newforum/comments.php?DiscussionID=18443&Focus=310822#Comment_310822 https://www.greenbuildingforum.co.uk/newforum/comments.php?DiscussionID=18443&Focus=310822#Comment_310822 Sat, 13 Jun 2026 20:52:56 +0100 philedge Embodied carbon, EWI, CWI, ASHP, Exposure zone 4 https://www.greenbuildingforum.co.uk/newforum/comments.php?DiscussionID=18443&Focus=310823#Comment_310823 https://www.greenbuildingforum.co.uk/newforum/comments.php?DiscussionID=18443&Focus=310823#Comment_310823 Sun, 14 Jun 2026 16:53:36 +0100 Victorianeco Embodied carbon, EWI, CWI, ASHP, Exposure zone 4 https://www.greenbuildingforum.co.uk/newforum/comments.php?DiscussionID=18443&Focus=310824#Comment_310824 https://www.greenbuildingforum.co.uk/newforum/comments.php?DiscussionID=18443&Focus=310824#Comment_310824 Sun, 14 Jun 2026 18:11:05 +0100 philedge
I don't know how beneficial removing them would be from a total heat loss perspective but I do know that cold window reveals can cause condensation and subsequent mould. If you're gutting rooms anyway then the work/mess might not be a big deal but probably not worth it if removing the cold bridges is the only thing to do in an otherwise habitable/decorated room.]]> Embodied carbon, EWI, CWI, ASHP, Exposure zone 4 https://www.greenbuildingforum.co.uk/newforum/comments.php?DiscussionID=18443&Focus=310825#Comment_310825 https://www.greenbuildingforum.co.uk/newforum/comments.php?DiscussionID=18443&Focus=310825#Comment_310825 Sun, 14 Jun 2026 20:33:52 +0100 Victorianeco Embodied carbon, EWI, CWI, ASHP, Exposure zone 4 https://www.greenbuildingforum.co.uk/newforum/comments.php?DiscussionID=18443&Focus=310846#Comment_310846 https://www.greenbuildingforum.co.uk/newforum/comments.php?DiscussionID=18443&Focus=310846#Comment_310846 Mon, 15 Jun 2026 14:32:01 +0100 philedge
You would likely compromise the structure of the window opening so that's why you'd need to add wall ties if you removed the brick closure]]> Embodied carbon, EWI, CWI, ASHP, Exposure zone 4 https://www.greenbuildingforum.co.uk/newforum/comments.php?DiscussionID=18443&Focus=310848#Comment_310848 https://www.greenbuildingforum.co.uk/newforum/comments.php?DiscussionID=18443&Focus=310848#Comment_310848 Mon, 15 Jun 2026 15:06:12 +0100 Victorianeco Embodied carbon, EWI, CWI, ASHP, Exposure zone 4 https://www.greenbuildingforum.co.uk/newforum/comments.php?DiscussionID=18443&Focus=310850#Comment_310850 https://www.greenbuildingforum.co.uk/newforum/comments.php?DiscussionID=18443&Focus=310850#Comment_310850 Mon, 15 Jun 2026 17:20:19 +0100 philedge Embodied carbon, EWI, CWI, ASHP, Exposure zone 4 https://www.greenbuildingforum.co.uk/newforum/comments.php?DiscussionID=18443&Focus=310852#Comment_310852 https://www.greenbuildingforum.co.uk/newforum/comments.php?DiscussionID=18443&Focus=310852#Comment_310852 Mon, 15 Jun 2026 20:53:46 +0100 Victorianeco Embodied carbon, EWI, CWI, ASHP, Exposure zone 4 https://www.greenbuildingforum.co.uk/newforum/comments.php?DiscussionID=18443&Focus=310853#Comment_310853 https://www.greenbuildingforum.co.uk/newforum/comments.php?DiscussionID=18443&Focus=310853#Comment_310853 Mon, 15 Jun 2026 21:54:43 +0100 philedge
If the brick closure has been formed by returning the inner leaf to meet the outer leaf with a vertical DPC so the inner and outer leaves are not brick bonded, then there should be ties around the opening already....should be!!]]> Embodied carbon, EWI, CWI, ASHP, Exposure zone 4 https://www.greenbuildingforum.co.uk/newforum/comments.php?DiscussionID=18443&Focus=310872#Comment_310872 https://www.greenbuildingforum.co.uk/newforum/comments.php?DiscussionID=18443&Focus=310872#Comment_310872 Wed, 17 Jun 2026 18:15:10 +0100 Victorianeco
No need to go to this extent if outing for EWI as well?]]> Embodied carbon, EWI, CWI, ASHP, Exposure zone 4 https://www.greenbuildingforum.co.uk/newforum/comments.php?DiscussionID=18443&Focus=310882#Comment_310882 https://www.greenbuildingforum.co.uk/newforum/comments.php?DiscussionID=18443&Focus=310882#Comment_310882 Thu, 18 Jun 2026 21:25:28 +0100 philedge Embodied carbon, EWI, CWI, ASHP, Exposure zone 4 https://www.greenbuildingforum.co.uk/newforum/comments.php?DiscussionID=18443&Focus=310887#Comment_310887 https://www.greenbuildingforum.co.uk/newforum/comments.php?DiscussionID=18443&Focus=310887#Comment_310887 Fri, 19 Jun 2026 20:10:06 +0100 Victorianeco
Basically is it worth it...]]> Embodied carbon, EWI, CWI, ASHP, Exposure zone 4 https://www.greenbuildingforum.co.uk/newforum/comments.php?DiscussionID=18443&Focus=311222#Comment_311222 https://www.greenbuildingforum.co.uk/newforum/comments.php?DiscussionID=18443&Focus=311222#Comment_311222 Sat, 22 Aug 2026 20:22:46 +0100 Victorianeco
I'm also wondering, is there ever any need to have DPM or closures on the cavities IF they are going to be filled? Surely they can be closed with blocks of EPS or just let the material that's going to fill the cavity simply fill against the windows?]]> Embodied carbon, EWI, CWI, ASHP, Exposure zone 4 https://www.greenbuildingforum.co.uk/newforum/comments.php?DiscussionID=18443&Focus=311223#Comment_311223 https://www.greenbuildingforum.co.uk/newforum/comments.php?DiscussionID=18443&Focus=311223#Comment_311223 Sat, 22 Aug 2026 21:43:08 +0100 djh Posted By: VictorianecoI'm also wondering, is there ever any need to have DPM or closures on the cavities IF they are going to be filled? Surely they can be closed with blocks of EPS or just let the material that's going to fill the cavity simply fill against the windows?Cavity closures need to be fireproof, which many insulation materials aren't. Depending on all surrounding detailing and the materials themselves they may also need to be protected from moisture/condensation.]]> Embodied carbon, EWI, CWI, ASHP, Exposure zone 4 https://www.greenbuildingforum.co.uk/newforum/comments.php?DiscussionID=18443&Focus=311224#Comment_311224 https://www.greenbuildingforum.co.uk/newforum/comments.php?DiscussionID=18443&Focus=311224#Comment_311224 Sun, 23 Aug 2026 15:34:13 +0100 Victorianeco
Any kind of calculation to be done in terms of cost v benefit of doing so?]]> Embodied carbon, EWI, CWI, ASHP, Exposure zone 4 https://www.greenbuildingforum.co.uk/newforum/comments.php?DiscussionID=18443&Focus=311454#Comment_311454 https://www.greenbuildingforum.co.uk/newforum/comments.php?DiscussionID=18443&Focus=311454#Comment_311454 Sat, 12 Sep 2026 14:34:23 +0100 Victorianeco
I mean if I need to recover concrete sills further on we can just fill the space with EPS blocks and expanding foam further down the line?]]>