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.

 Water droplets form on cold impervious surfaces such glass and paint.
 Stains on wallpaper often unnoticed.
c) Developments of mould, usually black mould.
d) One should also be aware of the site of most water vapour produced on a kitchen may diffuse through the house into cold bedroom, where it condenses on cool walls and
leads to mould growth.

The Solutions 

Improve Ventilation

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:
a) Open a few windows
b) Installing air vents
c) Using extractor fans

Postitve Pressure

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

 Mould Growth 

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:

  • wheezing
  • coughing
  • 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:

    • headaches
    • feeling exhausted
    • frequent coughing, especially at night
    • allergic reactions
    • chest colds
    • fever
    • difficulty breathing

    Long-term mold exposure, even if it doesn’t cause immediate symptoms, may also lead to:

    • losing your hair
    • anxiety
    • confusion or memory loss
    • numbness in hands and feet
    • stomach pains
    • gaining weight for no reason
    • muscle cramps

Contact Us

79 Beaconhurst Drive Beacon Bay Eastern Cape 5247

043 748 2173

071 435 4069