Condensation occurs when high levels of humid air are trapped within a building, where poor ventilation does not allow it to escape. This moisture then condenses when it touches cold surfaces such as windows or walls; eventually leading to mould growth. Improving insulation, double glazing and draught proofing can reduce the natural ventilation in properties and therefore lead to the build up of water vapour.

Condensation is most noticeable during the colder winter months of October to April, when windows are generally kept closed to keep the warmth in. Obvious places condensation can appear - apart from windows, are cold walls and floors. Sometimes it can occur in hidden areas such as roof voids or under suspended floors. Timbers in these particular areas may become susceptible to rot problems. Most properties will suffer from some form of condensation over time. However it becomes an issue if it is persistent and leads to other tell-tale signs such as damp walls with blistering paint, damaged and peeling wallpaper, 'Musty' damp odour, and black mould growth – along the edges of windows, skirting boards and wall/floor/ceiling junctions.

If the dampness leaves a 'tidemark' on the surface there may be another cause such as water entering through rising damp or penetrating damp.

DIY condensation solutions, such as opening windows and doors, should be first port of call, however, should this fail, our innovative ventilation systems may be your best solution.

The Damp Doctor positive input ventilation units are sophisticated whole home ventilation system that controls condensation. By drawing in fresh, filtered and clean air from outside, the units gently ventilate the home from a central position on a landing in a house or the central hallway in a flat or bungalow. Moisture laden air is replaced to maintain humidity levels at around 55%. This significantly reduces or eliminates surface condensation, the main cause for mould growth.