Unfortunately, many tenants are unaware of the importance of ventilation or simply neglect to properly ventilate their homes. Failure to ventilate a home can lead to a wide range of issues, including condensation forming on windows, walls and many other surfaces, eventually leading to mould.
In this article, we'll explore the reasons how condensation occurs, why preventing condensation is so crucial, and what tenants can do to ensure their homes are well-ventilated.
Condensation, Sydney’s Leading Cause of Mould Growth
Condensation is often found on windows and glass doors before anywhere else as they are exposed to both the indoor air as well as outdoor air. Window architraves and ledges are also commonly affected by condensation damage as the water pools in these surfaces after running down the windows.
However, if you find condensation on the inside of your windows, chances are that it’s also on your walls and ceilings too, it’s just less noticeable than condensation on windows.
How to Tell if Mould is Due to Condensation
Mould growth from condensation is usually a consistent spread across a surface rather than being in an isolated heavy spot. When forming on ceilings, mould caused by condensation will typically start above external facing walls, and make its way to the centre of the room.
You may also find mould can grow in square-like shapes or parallel lines. This is due to the ceiling missing insulation in sections or the roof trusses. These area’s condensate earlier than other areas as the surface transfers the temperature quicker, resulting in condensation forming.
How Tenants Contribute to a Condensation Problem
Actions which contribute to mould growth include:
- Not ventilating, preventing humid air from escaping indoors.
- Keeping rooms and wardrobes closed up
- Not running exhaust fans adequately
- Increased usage of gas heater
- Not cleaning exhaust fans and range hoods to keep optimum efficiency.
- Not completing routine regular cleaning allowing dust and dirt build-up
Ways to Lower Humidity and Prevent Condensation
- Keep windows and walls dry inside the home by ventilating rooms through opening windows or doors, using extractor fans and heating rooms with dry heat
- Let the sun into the home by opening curtains and blinds during the day
- Ensure that regular cleaning is carried out; dirt and dust can be a contributing factor to mould growth
- Plus many more available on our Tenant Checklist
Where to Look for Hidden Mould
Secret hiding spots of mould to check include:
- Behind furniture such as Bedside Tables and Couches
- Within a wardrobe, check the ceilings
- Check leather goods like shoes, belts and handbags
- The backside of curtains which are exposed to condensation
- Check on doors, the side which sits against the wall when open
We would recommend having a torch available at routine inspections to make mould easier to find.
If you suspect you have a property which suffers a condensation problem, call in the professionals and we will provide a detailed inspection report on:
or email
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