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Cavity Wall Extraction (CWE) frequently asked questions (FAQs).

12 01, 2026

How is cavity wall insulation removed?

2026-01-12T13:26:38+00:00|

Cavity wall insulation is removed by creating controlled access points to the external wall. Small access holes are drilled, and bricks are removed just above the damp proof course (DPC) level to allow full access to the cavity. Compressed air is blown through the cavity to loosen the insulation, which is extracted at exit points [...]

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