WebGeneral Cavity Insulation Disadvantages: Some types of cavity insulation can sag over time. If moisture gets into your cavity insulation, its ability to keep your home warm will diminish. Cavity fill insulation … WebMar 29, 2024 · Disadvantages of cavity walls: Cavity walls were first built, in exposed coastal areas, in order to keep out wind-driven rain. Filling the cavity with insulation will always hold the risk that moisture will be …
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