It is a fact that warm air can hold more water as vapour than cool air. So condensation is cause when moisture laden air comes into contact with a cold surface- the air is cooled to a point where it can no longer hold its burden of water vapour.
At this point (Dewpoint) water begins to drop out of the air and it is seen as condensation on the surfaces.
Signs of Condensation
Condensation is a seasonal problem occurring during the colder months.
Stains on wallpaper often unnoticed.
c) Developments of mould, usually black mould.
leads to mould growth.
This will disperse the internal moisture laden air and replace it with drier air from outside.(Internal air is drier than internal air most of the year) Ventilation is achieved by:
b) Installing air vents
c) Using extractor fans
Install slow speed fans set into the ceiling. This draws air into the roof space from outside through the eaves,and gently pushes it into the property.
This causes a slight internal positive pressure continually pushing out any moisture laden air as it develops.
Coupled with ventilation, a low leveled background heat will ensure no rapid changes in the environment and will facilitate warming of wall surfaces over a period of time reducing the risk of condensation.
Remove systems in the house that generate excess water vapour, eg gas/ paraffin heaters, drying racks for clothes or hot air clothes drier used inside the home.
Insulate cold surfaces
About Mould Growth
Condensation is a associated with mould growth, most visible as blck spot mould. Mould spores are present in the atmosphere, at low levels. Should these spore land on a wet surface (condensation) under humid conditions, they will germinate and develop into heavy mould growth, releasing vast numbers of spores. Not only does this cause decorative spoiling, but in some cases, health issues. Black mould only flourish on pure water associated with condensation.
Common mould poisoning symptoms for those without a respiratory condition include:
- nose stuffiness
- itchy or red eyes
- itchy skin
If you have allergies or asthma, you may experience more severe forms of these symptoms or have other serious symptoms, such as:
- feeling exhausted
- frequent coughing, especially at night
- allergic reactions
- chest colds
- difficulty breathing
Long-term mold exposure, even if it doesn’t cause immediate symptoms, may also lead to:
- losing your hair
- confusion or memory loss
- numbness in hands and feet
- stomach pains
- gaining weight for no reason
- muscle cramps