Pumped cavity Bead Insulation

It is incumbent on the installer to carry out a borescope survey of the cavity to ascertain the suitability of the residual cavity for the installation. Insist on this and request a copy of the report. Notwithstanding this, there is always a risk increase.
 
Good call on a report.
While examining the building, the installer did actually insert a borescope into the cavity and his findings matched a structural engineer, who I had spoken to previously who recommended pumping as well.
I had another separate engineer who works with retrofits say that I "MIGHT" notice some slight improvement in heat retention but very possibly none at all.
However they all seemed to think that beads will not lead to damp and that how the cavity is currently vented will be unaffected by beads as they allow both moisture and air to move in-between them anyway.
Then you read about horror stories or have local builder friends tell you not to fill the cavity, it can be hard to know what to think at times.
 
Silversurfer said:
Every time there is a storm my living room (upstairs) floor is covered in polystyrene beads.
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I presume you looked at addressing the source after the first occurrence? Any reason why it couldn't be addressed? With it being wind related there's a change some ventilation is not properly sealed but that's usually an easy enough fix.
 
Leo said:
I presume you looked at addressing the source after the first occurrence? Any reason why it couldn't be addressed? With it being wind related there's a change some ventilation is not properly sealed but that's usually an easy enough fix.
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There is obviously a draught between the ground and first floor. The floors are wood and the beeds are coming from under the skirting. The house is rendered so short of removing it I am at a loss. It was a new build in 2003 and we bought in 2011. It is adjacent to a lighthouse on a peninsula so is subject to very strong winds. The house is warm because it is south face with a large expanse of windows.
 
Fair enough. the issues are likely on the internal walls, holes for wiring or other services. If you're ever replacing flooring take off all the skirting and look for gaps that could be sealed.
 
michaelg said:
Do you have the walls pumped yourself ? What level of insulation was in the cavity previously ?
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All of this was done when the house was built in 2003. I remember the BER was low because of the number of windows, downstairs being open plan and tiled flooring. It was not possible to access the walls without causing remedial work. The house is warm but when there is a storm/high winds the beads are all over the room.
 
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