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Thanks - yeah I completely agree, nervousness about damp / breathability problems is one of the reasons I'd want this done by a pro / based on good advice. Will read that doc and see how it lines up with what I've read before
andyfallsoff-
I’ve just used this detail for insulating suspended timber floors downstairs. I was keen to get it right as we’re having UFH, so really wanted to ensure that the insulation wouldn’t cause problems with damp down the road. Any repairs would become a massive undertaking. This seemed to tick all the boxes, using the hemp insulation was a dream
Compared to PIR. https://www.ecologicalbuildingsystems.com/post/best-practice-approach-insulating-suspended-timber-floors
josho
IMO the trouble is that 'good' is quite hard to discern.
They might be punctual, polite, neat and well priced but it doesn't mean they've done a good job.
Would suggest a read of this https://www.thepebbletrust.org/wp-content/uploads/2023/08/230814_SRG-ed2_Digital-V2_compressed.pdf
To help inform what it is you're asking for because insulating floors and lofts in older buildings in particular needs to be done sensitively to avoid problems with moisture/damp/mold.