In early May 2025, a homeowner in North York contacted CPR24 Restoration for Asbestos Abatement and Attic Mold Removal North York.
Concerned about black mold in the attic and suspected asbestos in the unfinished basement, the homeowner reached out for immediate professional help.
The situation posed serious health risks, including potential respiratory issues from both mold spores and asbestos fibers.
Therefore, it required a coordinated and certified response.
This included containment, air filtration, and the safe removal of hazardous materials.
In addition, mold remediation had to be completed in strict accordance with Ontario’s health and safety regulations.
This case study outlines how CPR24 Restoration managed the Asbestos Abatement and Attic Mold Removal North York process efficiently and professionally.
We restored the property to a clean, healthy, and livable condition—all within just one week.
The Problem: Hidden Mold and Asbestos Threats North York
Attic Mold Infestation
The homeowner had noticed a musty smell and discolouration on the ceiling.
However, a professional inspection revealed that the attic sheathing was heavily contaminated with black mold.
In particular, this was especially true on the underside of the roof deck and rafters.
The cause was identified as poor ventilation and inadequate insulation, which together led to high humidity and condensation buildup in the attic during the winter.
This was not just a structural hazard.
Moreover, it was a serious health issue, especially for people with respiratory conditions, asthma, or allergies.
Asbestos-Containing Materials (ACMs)
During the property inspection, CPR24’s team found asbestos in the basement. The IICRC certifies the team.
Additionally, they discovered asbestos in the insulation and pipe wrap.
Although undisturbed at the time, this presented a major risk if any renovations or future flooding occurred.
As a result, the Ontario Occupational Health and Safety Act required licensed professionals to perform the abatement.
The Ontario Occupational Health and Safety Act required licensed professionals for abatement.
Inspection and Residential Mold Testing Findings North York
Our crew initiated a Phase I Environmental Assessment, which included:
- Air Quality Testing (spore counts, particulate matter)
- Bulk Sampling of attic sheathing, insulation, and basement piping
- Moisture Mapping using thermal imaging
- Material Testing to confirm presence of chrysotile asbestos
Test results confirmed:
- Attic mold levels > 1,200 spores/m³ (well above acceptable)
- Black mold (Stachybotrys and Cladosporium species)
- Confirmed chrysotile asbestos in pipe wrap and insulation
Action Plan: Safe, Legal, and Thorough Remediation North York
To fully resolve the hazardous conditions, CPR24 Restoration developed a custom 5-step plan that addressed both the asbestos abatement process and the attic mold removal, ensuring the home was safe, compliant, and mold-free.
- Containment & Negative Air Pressure Setup
- HEPA Filtration Mold Cleanup & Personal Protective Equipment (PPE)
- Asbestos Abatement and attic mold removal North York (Type 2/3 Procedures)
- Mold Remediation & Disinfection
- Post-Remediation Verification (PRV) and Clearance Testing
Step 1: Full Containment Zone Setup
We created a sealed work zone using 6-mil poly sheeting and negative air pressure chambers with HEPA filters. This ensured:
- Zero cross-contamination to unaffected parts of the house
- Controlled airflow to safely manage airborne spores and fibers
- Compliance with Ontario asbestos handling regulations
The orange tarped enclosure in the photo helped safely handle hazardous materials. This was especially important in risky areas like the attic hatch and basement pipe corridors.
Step 2: Asbestos Abatement (Basement)
The certified asbestos removal phase required full compliance with Ontario Regulation 278/05.
What We Did:
- Set up Type 2 containment zone with decontamination chambers
- Removed asbestos pipe wrap using wet methods and hand tools to reduce fiber release
- Bagged all ACMs in labeled, double-bagged containers
- Decontaminated the area using HEPA vacuums and wet wipes
They then fogged the entire area with an encapsulant to seal any microscopic particles.
💡 Why It Matters: Asbestos exposure can lead to mesothelioma and other cancers. This safe removal process protected both residents and future contractors.
Step 3: Attic Mold Removal
Once the basement was cleared, we shifted focus to the attic.
Key Steps:
- Removed contaminated insulation and debris
- Dry-brushed the sheathing to remove surface growth
- Applied an antimicrobial solution to kill remaining mold spores
- Performed soda blasting on all visible mold surfaces (a non-destructive, eco-friendly cleaning method)
- Installed industrial air scrubbers for 48 hours to clean the air
Post-removal, the attic was treated with anti-microbial encapsulant paint to prevent regrowth.
📷 (Refer to the second image above) — This shows mold colonization on the attic sheathing prior to blasting.
Step 4: Restoration & Ventilation Upgrades
After removal, the team replaced:
- Soiled insulation with mold-resistant R-60 fiberglass batt
- Roof vents and soffits for improved airflow
- A vapour barrier to control future humidity levels
These upgrades ensure the problem won’t return, even during peak North York, Toronto winters.
Step 5: Testing, Verification & Final Clearance
Before wrapping up, we conducted:
- Post Remediation Air quality tests (spores down to <50/m³ – well below threshold)
- Surface swab testing for mycotoxins
- Final inspection by third-party hygienist
We issued a Clearance Certificate and provided the homeowner with a 10-year mold-free warranty for the attic.
Results
Thanks to our comprehensive approach to attic mold removal and asbestos abatement, the homeowner received certified clearance and long-term peace of mind.
The team completed the project efficiently and safely within a week. In the attic, we removed all the attic black mold in three days. We used HEPA vacuuming, antimicrobial treatment, and soda blasting.
They replaced the old insulation with mold-resistant insulation materials. They also improved the ventilation system to stop future mold growth.
Workers completed the asbestos abatement in the basement in just two days. Workers carefully removed the asbestos pipe wrap and insulation.
We used standard Type 2 methods. This included full containment, wet methods, and proper and safe asbestos disposal. The team fully restored air quality in both the attic and basement to safe levels.
After cleaning, air tests showed that spore counts fell below 50 spores per cubic meter. This is much lower than the acceptable limit. Surface testing also confirmed that the team completely eliminated the mold and asbestos in the attic hazards. The authorities issued the homeowner a clearance certificate, along with a 10-year warranty on the attic mold remediation work.
Why Choose CPR24 Restoration?
Our attic mold removal and asbestos abatement services followed strict safety protocols, minimizing health risks and restoring air quality throughout the home.
- Licensed Asbestos Abatement Specialists
- IICRC-Certified Mold Remediation Technicians
- Full Compliance with Ontario Health & Safety Laws
- HEPA Air Scrubbing, Containment, and PRV TestingAvailable 24/7 in the GTA
Common Signs of Attic Mold or Asbestos Exposure
- Persistent musty odor
- Black streaks on attic wood or insulation
- Respiratory issues or allergies
- Disintegrating pipe wrap or insulation in older homes (built before 1985)
If you suspect mold in your attic or asbestos in your basement, don’t delay. These materials pose hazards, so certified professionals should handle them only.
Contact Us
At CPR24 Restoration, we specialize in professional mold removal services that prioritize both safety and long-term prevention. During this residential mold inspection in a North York home, we found a lot of mold in the attic insulation.
This was caused by bad airflow and moisture buildup. Our certified technicians carried out safe and efficient asbestos insulation removal, eliminating both health hazards at once. To prevent recurrence, we installed an upgraded airflow system focused on attic ventilation mold prevention, ensuring the space remains dry, healthy, and mold-free for years to come.
At CPR24 Restoration, we’re committed to restoring homes safely and completely.
Call us today (416) 551-8287
📍 Serving North York, Toronto, and GTA.