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Mold Inspection near Toronto, Ontario

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Informed Decisions Mold & Indoor Air Quality Solutions is a premier mold and indoor air quality inspection and testing provider servicing residential and commercial properties for over 22 years. Our consultants are expertly trained and certified, proudly belonging to the Occupational Hygiene Association of Ontario, the Ontario Association of Certified Engineering Technitians & Technologists, and the International Association of Certified Indoor Air Consultants. 

Example Mold Inspection Report.

Job Number: 201071

Note:  This is a mold inspection report from a recent project in our main office.  However, the type of mold issues detailed below are very similar to the conditions found in Toronto area homes.  

Reason for inspection:

  • Tenants have complained about mold growth on walls, windows, and contents.
  • The maintenance staff noticed high heat and humidity when entering the unit.
  • The maintenance staff cleaned visible growth with a bleach solution.
  • The maintenance staff opened windows to air out the unit prior to inspection.

Summary of concerns:

  • The poor housekeeping and inadequate ventilation has led to a condition conducive to large amounts of condensation-based mold growth.
  • Wet sheetrock in bedroom 1 may indicate a small area of exterior water intrusion, or may be secondary to massive condensation.

Summary of recommendations:

  • Install the appropriate exhaust fan as listed below in the ventilation section.
  • Establish containment and remove wet materials following mold remediation procedures listed below.
  • Remove all affected contents from the unit.
  • HEPA vacuum all accessible surfaces within the unit.
  • Apply EPA-registered anti-microbial agents to all areas of the unit via ULV fogger.
  • Install large HEPA scrubbers to filter air for approximately 48 hours and repeat indoor air quality sampling to ensure mold spore levels have returned to normal.


Adequate Ventilation Not Present

Recommended ventilation of residential homes should be between 0.35 and 0.7 air changes per hour (ACH).

  • Install Panasonic WhisperGreen 80CFM exhaust fan in the bathroom, set to run at 40CFM constant-flow and for 60 minutes at 80CFM once the motion sensor has been activated.  This will create the desired air exchange rate, and serve to remove excess humidity and prevent future condensation based mold growth and damage. 

Bedroom 1:

Summary:      Abnormal Conditions Found!


  • Maintenance reports mold growth wasd noted on exterior wall behid bed, and was cleaned with bleach.
  • Increased moisture content noted in baseboards and bottom 2” of sheetrock immediately behind bed on exterior wall.
  • Affected area of baseboards are swollen, warped, and deformed.
  • Window frames show evidence of mold growth and corrosion consistent with prolonged periods of condensation.
  • Residual mold growth was noted on the mattress.


  • Establish containment in the affected area.
  • Install HEPA scrubber for negative pressurization throughout the duration of work.
  • Remove wet sheetrock and baseboards
  • Remove any underlying insulation in the wall cavity to determine if moisture content is due to heavy condensation or leakage from the exterior.
  • Clean/treat/encapsulate any stained or contaminated framing or sheathing.
  •  Perform detailed HEPA vacuuming of the entire contained area.
  • Apply EPA-registered anti-microbial agents to the entire contained area via ULV fogger.


Summary:  Abnormal Conditions Found!


  • Baseboards slightly deformed, but not wet.
  • Window seal failed
  • Evidence of prolonged condensation on windows.
  • Maintenance reports mold growth was noted around windows, baseboards, and bed frame.  These areas were reportedly cleaned with a bleach solution.
  • Residual minor staining was noted on bed frame.