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I see so your suggested use of closers would separate the bay cavity as a self contained unit from the rest of the cavity. Yes, planning to keep vapour on the warm side of the studwork by sealing the insulation with foam and tape.

Exactly, I want to keep the cavity as it's doing its job.

DPC is knackered bitumen. I'd put a new one under the joists and overlap with the bitumen where it meets that. I had thought about cavity closers, but does that cavity actually need closing? If I build it up this way the cavity would run continuously around the bay so I'm not sure it needs...

Thanks. The joists are quite small spans and I need to rearrange them anyway, so with the overlap I need for sistering I'd probably be better off just replacing with a proper length. They need rearranging for the vent as well, so running them along the inner skin at the sides and nogging across...

Hi, I need to rebuild the inner leaf of this little bay window. 1930's house with cavity walls. Previously it had a studwork inner leaf with some haphazardly placed pir boards for insulation, which I had to remove to clear debris from the cavities and around the joists. I will recreate this as...

That's reassuring thanks, I'll focus on the rotten ones and leave any precautionary work to the ones with higher readings.

Due to various poor decisions by previous owners, the subfloor of my house has been damp and inadequately ventilated for many years. I've restored the ventilation but will have to repair/replace several rotten joists. Of the joists that are not rotten, some have quite high moisture content when...

Thanks that makes sense. Unfortunately it looks like when the opening was originally made it went in below the level of the dpc on the outer leaf. The one on the inner leaf is there but it's the original bitumen so I can't really lap into it. Would it make sense to put some new dpc along the top...

Hi, new to the forum. I'm currently doing a slow renovation/refurb/retrofit on my 1930s house. Getting the place warm and dry is my priority. I'm currently working on fixing the ventilation to the suspended sub-floor and then I'll be insulating it. In the process I've come across this threshold...

Posted this in the wrong place. Deleted to post on building forum