Woodworm need moisture to survive, and unfortunately something like restricting sub floor ventilation via blocking the sub floor air bricks can cause serious issues. In this instance the floorboards in this Wiltshire property are infested with active woodworm, and have caused a serious health and safety issue. If you have cavity wall insulation installed, or perhaps thinking of getting it installed you need to make sure the sub floor ventilation is sleeved to ensure decay and woodworm don't cause an issue. If you have damp at the base of the wall it would also be worth inspecting floor joists adjacent to the area, incase dry rot or wet rot occurs. Please see are other videos that show some of the issues with damp cavity wall insulation (cwi).
Негізгі бет Woodworm causes floor to collapse
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