Condensation & Mould Solutions in Brighton & Sussex

Condensation is by far the most common cause of dampness in UK homes, and Brighton is no exception. It occurs when warm, moisture-laden air meets a cold surface — typically an external wall or single-glazed window — and the water vapour in the air turns back into liquid. The resulting moisture creates the perfect environment for black mould (Aspergillus niger and Stachybotrys) to colonise walls, ceilings, window reveals, and soft furnishings.

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.

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 condensation hotspots.

While condensation is often dismissed as a lifestyle issue, it 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 from rising or penetrating damp, and to identify the most cost-effective combination of ventilation, insulation, and heating improvements.

We start with 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 that are driving the condensation cycle in your property.

Our solutions are tailored to each property and 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.