May 25, 20224 yr 2 minutes ago, PeterW said: +1 to this - and blown fibre has a nasty habit of settling over time if not done correctly. I would only use beads or batts but at a significant thickness +1, I did an extension for a neighbour and when we broke into the cavity the blown insulation had slumped badly and missing in some places.
May 25, 20224 yr 13 hours ago, joe90 said: Gosh can’t remember but rockwall insulation batts 100mm x2 staggered. My builder was not sure about full fill but they had a BBA certificate for this. After the build was finished the west wall got soaked through winter rains and when I core drilled fir the ASHP pipes I found the insulation had not absorbed the wet at all even though the bricks were soaked. I have since treated the bricks just in case. Thanks. You are braver than me. It would worry me forever more.
May 26, 20224 yr 10 hours ago, Roger440 said: Thanks. You are braver than me. It would worry me forever more. Well the BCO was happy as it had a BBA certificate and someone else here confirmed it would not wick moisture.
June 9, 20224 yr Author On 25/05/2022 at 08:43, joe90 said: +1, I did an extension for a neighbour and when we broke into the cavity the blown insulation had slumped badly and missing in some places. To support your experience, I read (lost the link) the Energy Trust survey on the inferior performance of this material in real world examples (Scotland).
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