Black Mold in Homes: Health Risks, Causes, and When to Call a Professional

Mold growth is a common issue in homes across Eastern Ontario, particularly in areas with moisture, poor ventilation, or previous water damage. What is often referred to as “black mold” can raise concerns for homeowners.

What People Mean by Black Mold

The term “black mold” is often used to describe dark-coloured mold growth. While not all black mold is toxic, mold exposure can still cause health symptoms for some individuals.

Common Causes in Ontario Homes

• Basement moisture and flooding

• Roof or plumbing leaks

• Poor ventilation in bathrooms or attics

• High indoor humidity

Potential Health Effects

Exposure to mold may cause respiratory irritation, allergic reactions, headaches, or worsening asthma symptoms, especially for sensitive individuals.

Why DIY Cleanup Can Be Risky

Improper cleanup may spread mold spores to other areas of the home. Professional remediation focuses on containment, removal of affected materials, and addressing the source of moisture.

When to Call a Professional

If mold is widespread, recurring, or linked to water damage, professional assessment is recommended.