Cavity wall insulation causing damp is very rare, but it's worth checking whether your home's at risk. You can use the checklist below to assess your home's damp risk. Ask our installer about these factors, too.
Damp could occur in properties as a result of cavity wall insulation if there is a combination of these factors:
Published guidance by the Building Research Establishmentsays that in these cases there is 'an increased risk of rain penetration if a cavity is fully filled with insulation'. Rain could penetrate the outer wall, bridge the cavity via the insulation material and transfer moisture to internal walls, causing damp.