JAG wrote:Modern bead installations are 'sticky' and don't drop out if a window is replaced.
Angib wrote:And the way to avoid this is quite clever - turn up the day before, drill holes along the line of the intended cut and squirt expanding foam into the cavity - that 'sets' the CWI along the cut and holds them in place the next day when the bit of wall is removed.
Angib wrote:some types of insulation bead are so light that they seem to get 'wafted' out of the top of the cavity in strong winds. If your loft has some mounds of beads in it, that's likely to be cavity wall insulation!
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