What is Mould?

Moulds are forms of fungi found all year round both indoors and outdoors. Another common term for mould is mildew. There are thousands of species of mould and they can be any color. Many times, mould can be detected by a musty odour. Most fungi, including moulds, produce microscopic cells called spore that spread easily through the air.

What Causes Mould Growth?

Mould requires nutrients, water, oxygen and favourable temperatures to grow. Nutrients for mould are present in dead organic material such as wood, paper or fabrics; mould can also derive nutrients from some synthetic products such as paints and adhesives. Mould requires moisture and thrive at normal indoor temperatures.

What Is Black Mould?

The news media often refer to black mould or toxic black mould. It is usually associated with Stachybotrys chartarum, a type of greenish-black mould commonly associated with heavy water damage. Not all moulds that appear to be black are Stachybotrys. The known health effects from exposure to Stachybotrys are similar to other common moulds, but may be associated with more severe health effects in some people.

How Does Mould Get Into Buildings?

Most, if not all, of the mould found indoors comes from outdoor sources. It needs moisture to grow and becomes a problem only where there is water damage, high humidity, or dampness. Common sources of indoor moisture that cause mould problems include flooding, roof and plumbing leaks, damp basements or crawl spaces, or any moisture condensation on cold surfaces. Bathroom showers and steam from cooking may also create problems if not well ventilated.

How Can I Prevent Mould Growth?

Controlling excess moisture is the key to preventing and stopping indoor mould growth. Keeping susceptible areas in the home clean and dry is very important. Ventilate or use exhaust fans (vented to the outdoors) to remove moisture where it accumulates, particularly in bathrooms, kitchens, and laundry areas.

Clothes dryers should be vented to the outside. Repair water leaks promptly, and either dry out and clean or replace water-damaged materials. Materials that stay wet for more than 48 hours are likely to produce mould growth.

Lowering humidity indoors helps prevent condensation problems. To lower humidity during humid weather, use air conditioners and dehumidifiers. Proper exterior wall insulation helps prevent condensation from forming inside during cold weather.

What Is "Mould Assessment?"

Mould assessment involves an inspection of a building to evaluate whether mould growth is present, and to what extent. Samples may be taken to determine the amount and types of mould that are present. The inspection includes exterior (roof, foundation, gutters, windows etc.) and interior inspection of property to identify potential sources of moisture that can cause mould growth.

What Is "Mould Remediation?"

Mould remediation is the clean up and removal of mould growth from surfaces and/or contents in a building. It also refers to actions taken to prevent mould from growing.