Find the water before you remove the mould.

“Black mould” usually refers to Stachybotrys, but plenty of harmless moulds are also dark, and colour alone tells you very little. What's established is that damp indoor environments and mould growth are associated with respiratory symptoms, and that people with asthma, allergies or compromised immune systems are affected more. We're remediation contractors, not doctors — if you're worried about symptoms, speak to your physician. What we can do is remove the growth and stop the moisture feeding it.

On a hard, non-porous surface like tile, a small amount of surface mould can be cleaned. On porous material — drywall, wood, insulation — bleach kills what's on the surface while the growth inside the material survives, and you've added moisture to a material that already has too much. Anything beyond about a square metre, anything recurring, or anything on porous material needs proper removal.

It depends on the area affected, whether it's inside wall cavities or on the surface, how accessible it is, and how much material has to come out. Containment setup carries a fixed cost regardless of size, so small jobs cost more per square foot. We quote a fixed price after an inspection.

Sometimes, and it usually turns on the cause. Damage from a sudden event — a burst pipe, a failed appliance — is more often covered than damage from a long-term leak or ongoing humidity, which many policies treat as a maintenance issue. We can't tell you what your policy covers. What we do is document the cause, the extent and the work thoroughly enough that your adjuster has what they need.

A contained single-room job is often two to four days including setup, removal, drying and clearance. Attics and multi-room jobs run longer. Drying time is the part that can't be rushed — we work to verified moisture readings, not a schedule.

Usually not. Containment and negative air are designed to keep the work area isolated from the rest of the house. For large jobs, work in the main living areas, or households with vulnerable occupants, we'll tell you honestly if we think you'd be better off staying elsewhere for a few days.

In older GTA properties this comes up regularly — you open a wall to remove mould-affected drywall and find asbestos-containing joint compound or pipe wrap behind it. We're Type 3 certified, so we handle both under one scope instead of stopping the job while you find a second contractor.