Attic Mold Removal Services

Attic mold is one of the most common hidden mold problems in homes. It can spread across roof sheathing, trusses, and insulation when moisture builds up from poor ventilation, air leaks, or seasonal condensation.
If you’re seeing staining on the wood, smelling a musty odour, or suspect mold growth, Extreme Clean Group can help.

Call 343-800-0078 to speak with a certified mold technician and book an attic assessment. We’re available 7 days a week.

Why Attic Mold Happens (and Why It Comes Back)

• Bathroom fan exhaust issues (venting into the attic instead of outside)
• Poor attic ventilation (blocked soffits, insufficient airflow)
• Warm air leaks from the home into the attic (around pot lights, attic hatch, plumbing stacks)
• Condensation & frost cycles during Ottawa winters
• Roof leaks or past water intrusion

The key to long-term results is addressing both the mold contamination and the moisture/ventilation cause.

Common Signs of Attic Mold

• Musty or earthy odour (especially on warm days)
• Dark staining on roof sheathing or trusses
• Clumped, damp, or compressed insulation
• Rusting nails or fasteners
• Bathroom condensation issues and persistent indoor humidity

Our Attic Mold Removal Process

Our mold remediation process follows a safety-first approach designed to protect occupants and prevent cross-contamination.
We employ containment/negative air, HEPA vacuuming, antimicrobials, and (when appropriate) third-party clearance testing  we apply those same principles to attic projects.

1. Inspection & moisture assessment
   We assess visible growth, moisture sources, ventilation, and the scope of contamination.
2. Containment & air control
   We isolate affected areas as needed and use HEPA filtration/negative air when the situation requires it.
3. Safe removal & detailed cleaning
   Depending on severity, we may remove contaminated insulation/materials and perform detailed HEPA vacuuming of surfaces.
4. Targeted treatment
   We apply appropriate antimicrobial solutions and remediation techniques for attic materials.
5. Prevention recommendations
   We identify the cause (air leaks, ventilation, exhaust routing, moisture) and recommend practical fixes to reduce the chance of re-growth.
6. Optional post-remediation verification
   Where warranted, we can recommend follow-up indoor air quality testing through a third party to confirm safe clearance.

Is Attic Mold Dangerous?

Mold can impact indoor air quality, especially when spores enter living areas through ceiling penetrations or airflow pathways.
People with allergies, asthma, or respiratory sensitivities may notice symptoms more strongly. If you’re unsure, a professional assessment is the safest next step.

Why Choose Extreme Clean Group

• Certified, experienced remediation team for complex and high-risk environments
• Clear, step-by-step process with safety controls (containment, HEPA filtration, proper cleaning)
• Focus on prevention so the problem doesn’t just return next season
• Available 7 days a week

Book an Attic Mold Assessment

To book attic mold removal in Ottawa, call 343-800-0078 or use our contact form and a team member will reach out to you.