mould growth

Causes of Mould Growth in Toronto

Most homeowners and business owners know that mould is something very serious and therefore should be treated as such. Although mould grows outside and actually serves a purpose, mould that grows inside your home only causes health concerns for your health.

What causes mould growth in Toronto? The one-word answer is water. However, there are actually five factors that are needed to support fungal growth. But, water is one of the most easily controlled indoor factors. The other factors are light, temperature, nutrients, and PH.

Water usually is the result of excessive humidity. Every home usually has spaces with poor ventilation. Such as attic, basement, cabinets, and bathrooms. One of the best ways to try and eliminate humidity is by using a dehumidifier, however, it is no the only solution.

Humidity Causes Mould

If the weather has been very humid for a few days in a row, it is very possible to start notice mould growth in your home. It is very common to see mould growing on different surfaces because of the wet air, especially when it rains for several days.

Also, if you live where the humidity in the air is high, then mould growth in your home can also be a recurring problem. Additionally, when moisture inside your house evaporates into the air it increases the humidity indoors. Therefore, ventilation plays a very important role in controlling the humidity in your home. 

Sometimes people use humidifiers in order to control mould growth. However, mould needs the humidity level to be higher than 55% to start growing. Therefore, make sure to keep the humidity below 55%. 

Leaking Pipes Cause Mould

Water leaks from pipes are a common cause for the mould growth. The ones that go undetected, hidden out of view, are the worst leaks and they usually can be found inside a wall. By the time you discover the leak, mould growth has already started. 

Leaks in Roof Cause Mould

Like some leaking pipes, a roof that leaks into the attic usually it is not discovered until you notice mould growth. The best thing to do is to regularly check for leaks and keep an eye on the ceiling. If you notice any water damage or mould growth on the ceiling, then you probably have a leaking roof

Condensation Causes Mould

Cold surfaces can create condensation at your home. Condensation collects on cold metal pipes as well as on concrete floors. Places where condensation occurs, are spots for mould growth.

Poor Ventilation Causes Mould

As we early mentioned if your home has poor ventilation it can create pockets of stagnant moist air making it possible for mould to thrives in. Steam and water evaporating into the air will create humidity inside your home. Therefore it is important to circulate air outdoors through windows in order to keep the moisture level balanced.

Wet Clothes Cause Mould

If you leave wet clothes for too long in your house it can cause mould growth. 

Damp clothes left in a pile waiting to be washed for several days can lead to mould growth. Even after you wash your clothes, and leave them wet for a few days can also lead to mould. 

Flooding Causes Mould

It is almost inevitable that some mould problems will appear if your home has been affected by flooding. Obviously the home will be wet for a long time during the flood. It will take several days or weeks to dry out. Since mould needs only 24 hours to grow if it finds suitable conditions, there is a huge risk that your flooded home will cause mould growth. 

Damp Basement Causes Mould

Since the basement is not well ventilated, it contains higher amounts of moisture or humidity than other rooms. Basements are also often colder, therefore more condensation occurs and leads to humidity and dampness.


CPR24 Restoration is a full-service mould remediation company. What it means is that we offer the full scale of solutions needed for complete removal and prevention of mould. From identifying the cause of mould to fixing any design flaws or tubing associated with it to repairing or replacing the affected areas, and the prevention of further mould by removal and sealing to rigorous testing to detect any traces of new mould, we strive to be a leader in the mould solutions industry.

By following our team tips, you easily will remove mould in areas such as bathroom walls and floors, however, if you have a significant mould issue, please call CPR24 Restoration.