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Black mold growing on the white walls and ceiling corner near a window, indicating moisture and poor ventilation issues.
Mold growth on an indoor wall corner near a window, with black and green patches spreading up from the baseboard on a beige painted surface.

Living in Weston‑super‑Mare comes with seaside charm, but it also brings moisture challenges. Salt-laden air, cool mornings, and homes built before modern insulation can make condensation a daily battle. When moisture lingers on window sills or cold corners, mould spores settle in, feeding off your walls, timber and soft furnishings. It doesn’t just look unpleasant—it can damage your property and affect your health too. That’s where we come in as a local damp proofing contractor, offering services from damp surveys to timber treatment, mould treatment, and tanking.

This blog is your go-to guide for understanding why mould shows up in coastal homes, how we tackle it properly, and why installing the right system makes all the difference.

  • Health concerns – Black mould often releases spores that can trigger coughs, sneezes, and breathing problems, especially in children or asthma sufferers. It can also worsen allergies and lead to persistent rhinitis.
  • Home damage – Mould eats into paint, plaster, and timber, causing discolouration and decay. Without prompt timber treatment, structural components like skirting boards and window frames suffer too.
  • Air quality drop – Air in mouldy rooms can feel stale and damp, and poor ventilation doesn’t help. Over time, whole rooms—or even entire flats—can suffer from poor indoor air.

That’s why a proper damp proofing contractor steps in with smart solutions like damp surveys, tanking, timber treatment, and thorough mould treatment.

A window with condensation and water droplets on the glass, showing mold and mildew growth on the windowsill and wall corner, indicating damp and poor ventilation.
A person wearing a glove uses a brush to apply blue waterproofing paint along the corner seam between a concrete floor and wall. A bucket of blue paint sits nearby. The wall is unfinished with visible texture.
  • Damp surveys – First, our survey team checks your property for hidden sources of mould—moisture trails, timber rot, condensation hotspots. We use moisture meters and inspections to get to the root of the problem.
  • Surface mould removal – We treat visible mould with fungicidal washes, scrubbing away stains and sanitising surfaces. No hidden specks left behind—we clean it properly.
  • Timber treatment (if needed) – If mould has penetrated woodwork, we apply specialist timber treatment solutions that protect against decay and future infestations. This keeps floorboards, frames and skirting safe.
  • Tanking alternatives (for severe damp) – In spaces like basements or storage areas, moisture may come from walls rather than condensation. That’s where tanking comes in—a waterproof membrane or cementitious barrier seals things off.
  • PIV Installation – the game-changer – The real secret weapon is Positive Input Ventilation (PIV). Modern, discreet, and low-energy, PIV installation systems continuously pump filtered air into your loft. That subtle airflow pushes stale, moist air out through trickle vents. No fuss, no draught—just constant mould prevention.

While professional help is key, there are things you can do right now:

  • Open trickle vents or window locks slightly during and after showers
  • Avoid drying clothes on radiators indoors
  • Use extractor fans when cooking
  • Keep furniture a few centimetres from walls to help air flow
  • Keep the loft space ventilated

These steps help your mould treatment and PIV installation work better—keeping your home fresh long-term.

Spots and patches of black and gray mold growing on a white textured wall, indicating moisture damage and poor ventilation.
Mold growth on a white wall near the floor and baseboard, with dark patches and stains spreading horizontally along the lower part of the wall above a wooden floor.

Some signs need professional attention:

  • Persistent black spots on walls, ceilings, or window frames
  • Damp or musty odours in closets or behind furniture
  • Soft spots in timber and flaking plaster
  • Visible mould after cleaning returns quickly

That’s where our role as a damp proofing contractor with damp surveys, timber treatment, tanking, and mould treatment comes in. We’ve seen it all and solved it all.