Damp and mould: causes and lasting fixes

Condensation, penetrating damp or rising damp? How to identify the cause of damp and mould in your home and the repairs that fix it for good.

Damp and mould damage homes and health. Painting over mould does not fix it. You need to find and treat the cause.

Condensation

The most common cause. Moist air from cooking, showers and drying clothes settles on cold surfaces. Better ventilation, extractor fans and heating help.

Penetrating damp

Water getting in from outside through failed gutters, cracked render, roofs or window seals. Usually appears as patches that grow after rain.

Rising damp

Ground moisture rising through walls, usually in older properties with a failed or bridged damp-proof course. It is less common than often claimed, so get a proper diagnosis.

Lasting fixes

  • Repair gutters, downpipes and roofs
  • Repoint brickwork and repair render
  • Fit extractor fans and trickle vents
  • Improve insulation to remove cold spots

Everyday habits that help

Put lids on pans, use extractor fans, dry clothes outside where possible and leave trickle vents open. Keeping rooms at a steady, moderate temperature helps prevent condensation.

Cleaning mould safely

Small areas of mould can be cleaned with a suitable mould remover while wearing gloves and keeping the room ventilated. Larger areas, or mould that keeps returning, need the cause fixing.

For landlords

Respond quickly to reports of damp and mould, investigate the cause and keep tenants informed. Expectations on landlords in this area have been rising.

Frequently asked questions

Is mould dangerous?

Mould can affect breathing, particularly for children, older people and anyone with asthma. Treat it promptly.

Can you survey my home?

Yes. Book a visit and we will find the cause and quote for the repair.