Mould Removal & Condensation Control in Brighton & Sussex

Mould removal in a home is rarely a one-off cleaning job. To stop black mould coming back, you have to fix the moisture conditions that let it grow in the first place. In Brighton and across Sussex, the underlying cause is almost always condensation — warm, moisture-laden indoor air meeting a cold surface and turning back into liquid water. Black mould species (Aspergillus niger and Stachybotrys) thrive in those damp conditions and colonise walls, ceilings, window reveals, and soft furnishings within weeks.

Modern living habits generate enormous amounts of moisture. Cooking, showering, drying clothes indoors, and even breathing all add water vapour to the indoor air. In a well-ventilated house this moisture escapes harmlessly, but in many Sussex homes — particularly those that have been draught-proofed, fitted with double glazing, or converted into flats — the natural ventilation pathways have been sealed off. The result is a build-up of humid air that condenses on the coldest surfaces, creating the perfect environment for mould.

Period properties with solid walls are especially prone because the walls have a low thermal mass relative to modern insulated construction, making interior surfaces colder. North-facing rooms, corners where two external walls meet, and areas behind furniture pushed tight against external walls are classic mould hotspots.

While condensation and mould are often dismissed as a lifestyle issue, they can indicate genuine building defects such as cold bridges, missing or failed insulation, blocked air bricks, or inadequate extraction in kitchens and bathrooms. A specialist assessment is important to distinguish condensation-driven mould from rising or penetrating damp, and to identify the most cost-effective combination of mould treatment, ventilation, insulation, and heating improvements.

Effective mould removal starts with diagnosis, not bleach. We carry out a thorough assessment of ventilation rates, heating patterns, insulation levels, and lifestyle factors. Using humidity data loggers and thermal imaging, we identify the specific cold spots and airflow deficiencies driving condensation in your property — because removing the visible mould without fixing these root causes guarantees regrowth within months.

We treat affected surfaces with professional fungicidal solutions to kill mould at root and prevent immediate regrowth, then implement tailored measures to keep it from coming back. These may include installing positive input ventilation (PIV) units, upgrading or adding extractor fans in kitchens and bathrooms, fitting trickle vents to sealed windows, clearing blocked air bricks, and applying anti-condensation coatings to problem surfaces. Where cold bridging is the main issue, we may recommend internal wall insulation or external insulation to raise surface temperatures above the dew point.

We also provide clear, practical advice on day-to-day habits — heating schedules, ventilation routines, and moisture management — that complement the physical improvements. Our goal is to create a balanced indoor environment where moisture is generated, ventilated, and managed without damaging your home or your health. All ventilation installations come with a manufacturer-backed guarantee.