Who should then remove the mould is best determined by the severity of the problem. Small amounts of mould in window corners and crevices, or on drywall and tiles, may be tackled by homeowners using the right techniques. The Canadian Mortgage and Housing Association (CMHC) suggests you can clean small areas of mould yourself using an unscented detergent and water; chemicals such as bleach and fungicides are not recommended. Here are some other recommendations from the  EACO, the Environmental Abatement Council of Ontario:

• You should wear a filtration mask on your face, and consider disposable dust-impervious coveralls, both of which can be found at home improvement stores.
• You should also use household rubber gloves and protective glasses.
• A disposable plastic or cloth drop sheet should be placed below the affected area where possible.
• Since you will be disturbing mould spores during the cleaning process, it is advisable to turn off your home heating or air conditioning to reduce the risk of spores being distributed elsewhere in the house.
• Remove any porous materials, such as ceiling tiles and drywall,  to a point beyond the immediate areas that are visibly contaminated to a minimum distance of 30 cm in all directions.