Doesn’t cavity wall insulation cause damp?
No. Extensive tests have shown that Knauf Supafil cavity wall insulation does not allow water to pass across the cavity. Supafil cavity wall insulation also contains a water repellent, and Knauf Supafil is approved by the BBA (British Board of Agrement). Before installing the insulation, the empty wall cavities are inspected for obstructions with a special tool called a boroscope. Any obstructions are noted and cleared by the installers before the insulation is injected.
Installations by approved installers are gauranteed by CIGA
Posted in: Cavity Wall Insulation