Mon, 12 Oct 2026 23:17:31 +0100 https://www.greenbuildingforum.co.uk/newforum/ Lussumo Vanilla 1.0.3 https://www.greenbuildingforum.co.uk/newforum/comments.php?DiscussionID=18327&Focus=308918#Comment_308918 https://www.greenbuildingforum.co.uk/newforum/comments.php?DiscussionID=18327&Focus=308918#Comment_308918 Fri, 01 Aug 2025 16:11:15 +0100 amin
The house currently has a traditional timber suspended floor, which I initially planned to replace with a solid floor using foam glass aggregate. However, upon exposing the structure, I’ve found timber wall plates embedded in both the internal and external solid brick walls, supporting the joists above the slate DPC.

If I go ahead with the solid floor, I’d need to remove these wall plates throughout. Has anyone done this before? Is it practical or more trouble than it’s worth?

Alternatively, I’ve been pointed toward a full-fill EPS solution to insulate beneath the suspended floor. I have 250mm below the 100mm joists. Would this be viable given the embedded wall plates? I’m particularly concerned about the long-term risk of trapping moisture or causing rot at the joist ends or wall plates themselves.

Interested in views from others who’ve dealt with this or have experience with either approach.

Thanks!]]> https://www.greenbuildingforum.co.uk/newforum/comments.php?DiscussionID=18327&Focus=308919#Comment_308919 https://www.greenbuildingforum.co.uk/newforum/comments.php?DiscussionID=18327&Focus=308919#Comment_308919 Fri, 01 Aug 2025 18:34:53 +0100 tony
With lime mortar they would likely be good for another 100 years providing they are ventilated and not cement rendered or pointed outside.

I like the idea of EPS fill]]> https://www.greenbuildingforum.co.uk/newforum/comments.php?DiscussionID=18327&Focus=308921#Comment_308921 https://www.greenbuildingforum.co.uk/newforum/comments.php?DiscussionID=18327&Focus=308921#Comment_308921 Fri, 01 Aug 2025 20:39:09 +0100 Mike1
Progressively chopped them out in sections long enough to replace the timber with about 3 bricks, then slate pieces knocked into the filled joint above to ensure it was well pinned up. Leave for a few days then do the next section.]]> https://www.greenbuildingforum.co.uk/newforum/comments.php?DiscussionID=18327&Focus=308923#Comment_308923 https://www.greenbuildingforum.co.uk/newforum/comments.php?DiscussionID=18327&Focus=308923#Comment_308923 Fri, 01 Aug 2025 21:47:55 +0100 amin
With the wall plates for some of it anyway I may have no choice but to replace because I’ve spotted that sections are rotting away due to moisture ingress. Likely due to a massive mulberry tree that was right up against the wall - one of the first things I had to remove after buying the house.

@Tony I checked the brick after your comment about headers and seems like the bricks right above the wall plates aren’t tied into the wall. There is a gap behind them and then the solid wall- makes me wonder if they are structural at all.

@Mike1 at first floor level sounds intense!]]> https://www.greenbuildingforum.co.uk/newforum/comments.php?DiscussionID=18327&Focus=308924#Comment_308924 https://www.greenbuildingforum.co.uk/newforum/comments.php?DiscussionID=18327&Focus=308924#Comment_308924 Sat, 02 Aug 2025 04:35:38 +0100 tony https://www.greenbuildingforum.co.uk/newforum/comments.php?DiscussionID=18327&Focus=308947#Comment_308947 https://www.greenbuildingforum.co.uk/newforum/comments.php?DiscussionID=18327&Focus=308947#Comment_308947 Wed, 06 Aug 2025 11:48:58 +0100 amin
With full fill, do you go up to the top of the joists?]]> https://www.greenbuildingforum.co.uk/newforum/comments.php?DiscussionID=18327&Focus=308950#Comment_308950 https://www.greenbuildingforum.co.uk/newforum/comments.php?DiscussionID=18327&Focus=308950#Comment_308950 Wed, 06 Aug 2025 17:00:49 +0100 tony https://www.greenbuildingforum.co.uk/newforum/comments.php?DiscussionID=18327&Focus=308956#Comment_308956 https://www.greenbuildingforum.co.uk/newforum/comments.php?DiscussionID=18327&Focus=308956#Comment_308956 Fri, 08 Aug 2025 13:32:48 +0100 dathi https://www.greenbuildingforum.co.uk/newforum/comments.php?DiscussionID=18327&Focus=309038#Comment_309038 https://www.greenbuildingforum.co.uk/newforum/comments.php?DiscussionID=18327&Focus=309038#Comment_309038 Mon, 18 Aug 2025 10:39:43 +0100 amin https://www.greenbuildingforum.co.uk/newforum/comments.php?DiscussionID=18327&Focus=309048#Comment_309048 https://www.greenbuildingforum.co.uk/newforum/comments.php?DiscussionID=18327&Focus=309048#Comment_309048 Mon, 18 Aug 2025 21:51:23 +0100 tony