DAMP – CONDENSATION
The amount of water in the air varies with temperature, as warm air has a greater water-holding capacity than cold air. Air within a building is usually warm and carries a considerable quantity of water vapour. When it is cooled by contact with cold surfaces or by night-time heating shut-down, the excess water can no longer be supported in the air and condenses as liquid water on wall and window surfaces. Condensed water on windows runs down and collects on the bottom rail and sill, often causing dark mould spots. Similar evidence of condensation can be seen on walls and ceilings, where large patches of green or black mould can appear, damaging decorations and creating an unhealthy atmosphere through the release of spores, which can affect people with respiratory complaints.
The cure for condensation varies from property to property. Improving ventilation, installing cavity wall insulation and altering domestic heating arrangements are amongst the most common cures, although in extreme cases it may be necessary to install positive input ventilation machines in order to dilute, displace and replace the existing moisture rich air with cleaner, fresher and less damp air.
Tips for Reducing Condensation
- Improve ventilation
- Increase heating level
- Improve level of insulation
- Reduce moisture sources
- Improve insulation of external walls.
Positive Pressure Ventilation
This system draws in fresh filtered outside air through the loft and creates positive pressure to circulate it around the property and displace stale contaminated air. This reduces humidity, cures condensation and eradicates mould.
Extractor Fans
Ideal for high humidity locations such as the bathroom and kitchen, filterless extract fans will evacuate moisture laden air to the outside quickly and efficiently.