Mold Removal Ottawa Cost

What is the cost of Mold Removal in Ottawa?

The generalized Mold removal cost is anywhere from $9 to $14 per square foot for larger projects. Of course this doesn't take into account the project minimums. There are also certain situations where the square foot cost can exceed these depending on the difficulty of the removal. Due to the great setup and tear-down requirements required to decontaminate the area a lot of time one has to expect these. This is a much more intricate demolition process than clean demolition. These rates will also vary from one proving to the other.

It's important to remember that while this is an important matter that needs to be dealt with, there is no sense in panicking. Panicking inhibits proper decision making. If the contractor you're dealing with is putting pressure on you and making you feel uneasy, remember you have options. Consider getting more quotes.

🟨 2. Moderate Containment (Level 2)

Used for: Medium-sized contamination — 10–100 ft² (≈ 1–10 m²).

Setup:

• Full containment wall: Framed or taped 6-mil plastic enclosure sealed floor-to-ceiling.
• Zipper door: Temporary access doorway or flap system.
• Negative air pressure:

-4 air changes per hour minimum.

-Air exhausted outdoors via HEPA air scrubber.

• Decontamination area: Small buffer zone for workers to remove PPE before exiting.

👉 This prevents airborne spores from entering adjacent rooms or HVAC systems.

Examples of Level 2 Mold Work:

• Attic Sheathing: The sheathing is the osb or plywood that the roof shingles are fastened to. It isn't uncommon for mold to form on the underside of the sheathing of homes that have poor attic insulation. This also happens in areas where the bathroom and stove hood aren't properly vented to the outside of the home, resulting in hot air being blown into or leaking into the attic rather than outside. This contrast forms condensate, which can lead to mold.
• Sections of drywall: The same as in level one, drywall and become mouldy. When the surface area is substantial (above 10 square feet), the aforementioned setup must be used to remediate as the danger of contamination is elevated.
• Small Basements of furnace rooms: The same principle applied as "sections of drywall

🟥 3. Full Containment (Level 3 / “Critical Containment”)

Used for: Large or high-risk projects — over 100 ft² (≈ 10 m²) or any mold in HVAC, hospitals, schools, or occupied dwellings.

Setup:

• Full isolation of the work zone: 6-mil poly double-layer barriers, sealed with tape and mechanical fasteners.
• Negative-pressure enclosure (NPE): Continuous monitoring to maintain ≥ 0.02 inches water column pressure differential.
• Airlocks and decon chambers:

-Clean room → Shower → Dirty room → Work area (in large commercial projects).

-Workers change PPE and bag waste before exiting.

• HEPA filtration: Multiple units providing continuous filtered exhaust.
• Waste removal protocol: Sealed double-bagged material labeled “Mold-Contaminated.”

👉 Mandatory for attic, crawlspace, or full-basement remediation where multiple materials are impacted.

Examples of Level 3 Mold Work:

Attic & Crawlspaces: Disturbing Due to High spore concentration, negative pressure constros issues and unconditionsed / hard to seal spaces, these must be done under level 3.

Because these apaces are connected to the home's air pressure zones and often move to toward the home, the air must be better controlled. Especially when you consider the fact that the the mold colonies are largest and oldest in these areas. Without proper containment, these can travel through soffit vents, light fixtures, HVAC and unsealed penetrations.

Full Basement Remediation: Where multiple materials are impacted, this containment level must be used.

We've helped families with full home remediation projects all the way down to vents abatements. On the commercial side, we've abated full buildings down to just a unit or part of. Many buildings in Ottawa have mould that reoccurs due to an inability to evacuate the entire building.

Free Estimate & Plan Of Action

If you're concerned and believe you may need mold removal services, we invite you to contact us for a free, no obligation quote. The removal and Disposal in Ottawa is something we're happy to spend time on the phone with you for. We believe that the best way to help people remain calm about the issue is through education. This is one of the reasons we've made so many videos about it here. Above all, remember that Mold is toxic and very hazardous.

If you choose to have a third party test your home before doing work with us, it is important that the environmental consultant truly have knowledge in full project execution and understand the full scope of what you're looking to have done.  Otherwise, the result is that the client ends up with insufficient tests or insufficient amounts of samples and require the consultant to come back and a separate report to be created, ultimately costing the client more money.

In other scenarios, lack of care as described above can lead to an entire project being put on hold in order to perform more testing and then a project increasing exponentially once it is discovered that an additional material, such as plaster, popcorn ceiling or tile, is discovered to be mouldy.