Mould Remediation in Ottawa, Ontario
Mould in Ottawa follows water. A flooded finished basement, a slow leak behind a wall, or a damp room after spring high water gives it what it needs within a couple of days. 911 Restoration of Ottawa responds around the clock in Centretown and the Glebe, Lowertown and Sandy Hill, Westboro and Hintonburg, Rockcliffe Park and New Edinburgh, Vanier and Overbrook, Alta Vista, Gloucester, Orléans, Cumberland and Navan, Nepean, Bells Corners and Britannia, Barrhaven, Riverside South and Hunt Club, Manotick, Greely, Kanata, and Stittsville.
Quick answer: 911 Restoration of Ottawa provides 24/7 mould clean-up and remediation across Ottawa, including Nepean, Kanata, Orléans, Alta Vista, and Barrhaven: containment, HEPA air filtration, removal of affected materials, moisture correction, and repairs, with a typical 45-minute arrival and Direct Insurance Coordination. Call (343) 321-0430 for immediate help.
Why Mould Grows in Ottawa Homes
Wet finished basements after storms
After the July 1, 2026 storms and the August 10, 2023 storm, finished basements in Ottawa took on water. Carpet, underlay, drywall and insulation that stay wet for 24 to 48 hours can start to grow mould, so fast extraction and drying prevent most of the work that remediation would otherwise need.
Hidden moisture behind walls
A pinhole leak, a leaking window well or condensation in a cold wall can feed mould where no one looks. Musty odour, peeling paint and staining are signs to test moisture before anyone cleans the surface, because the source has to be fixed or mould returns.
Workplace and multi-unit buildings
Ontario's workplace mould alert says the Occupational Health and Safety Act places duties on constructors, employers and supervisors, including protecting workers from mould. For offices, shops and shared buildings we contain the work area, document conditions and keep occupants away from it.
How We Handle Mould Remediation in Ottawa
- You call (343) 321-0430. We ask about the area, the odour, and any recent water, and we schedule an assessment.
- We inspect with moisture meters and thermal imaging to find the extent of the growth and the water source.
- We set up containment with plastic barriers and negative air pressure so spores do not spread to clean areas.
- We remove affected porous materials, HEPA vacuum and clean surfaces, and apply antimicrobial treatment.
- We dry the area to verified targets and confirm the moisture source is corrected before rebuilding.
For the national overview of this service, see Mould Remediation.
Signs You Need Mould Remediation, and What To Do First
- A musty or earthy odour in a basement, closet, or crawl space
- Dark spots or fuzzy growth on drywall, wood, or ceiling tiles
- Peeling paint or bubbling wallpaper on exterior or basement walls
- Condensation on windows, pipes, or foundation walls
- Stored boxes or furniture in the basement that feel damp
- Allergy-like symptoms that improve when you leave the house
Do not scrub, spray, or disturb visible mould, because that releases spores into the air. Keep the door to the area closed, run a dehumidifier if you have one, and stop any active leak. Then call (343) 321-0430 for an assessment.
What Affects the Scope and Timeline
The scope depends on how large the affected area is, which materials are involved, and whether the moisture source is still active. Mould on a hard surface can often be cleaned, while mould in drywall, insulation, and carpet pad usually means removal. We map the affected area and write a scope that lists every material we will clean or remove.
A small, contained area can take one to two days. A finished basement or a large area behind walls takes longer because of containment, removal, drying, and rebuilding. We do not close walls until the moisture readings confirm the area is dry.
What We Restore After Mould Growth
- Finished basements
- Drywall and insulation
- Crawl spaces and sill plates
- Attics and roof sheathing
- Bathrooms and kitchens
- Subfloors and framing
- HVAC components
- Contents stored in damp areas
Insurance and Documentation for Mould Remediation
We provide Direct Insurance Coordination when mould follows a sudden, covered water loss, with photos, moisture readings, and a written scope for your adjuster. Many policies limit or exclude mould from long-term leaks, humidity, or neglect, so check your policy and ask your carrier how mould is treated before work begins.
Why Property Owners Choose 911 Restoration for Mould Remediation
24/7 Response, 45-Minute Typical Arrival
We answer every call at any hour, and our typical arrival is 45 minutes, so damage gets attention while it can still be contained.
IICRC-Certified Technicians
Trained crews with moisture meters, thermal imaging, and the containment and disinfection equipment each job requires.
Direct Insurance Coordination, No Subcontractors
One local team documents the loss, works with your adjuster, and handles the work from emergency response through reconstruction.
We provide this service in Centretown and the Glebe, Lowertown and Sandy Hill, Westboro and Hintonburg, Rockcliffe Park and New Edinburgh, Vanier and Overbrook, Alta Vista, Gloucester, Orléans, Cumberland and Navan, Nepean, Bells Corners and Britannia, Barrhaven, Riverside South and Hunt Club, Manotick, Greely, Kanata, and Stittsville.
Frequently Asked Mould Remediation Questions in Ottawa
How soon can mould grow after a basement flood in Ottawa?
Can I clean mould myself?
Do you fix the moisture source too?
Is mould common after a spring river flood?
How do I know the mould is gone?
Related Services from 911 Restoration of Ottawa
This page is part of 911 Restoration of Ottawa. If your loss involves more than one problem, we also provide Water Damage Restoration, Sanitization Services, and Reconstruction, all handled by the same local team.
Contact 911 Restoration of Ottawa About Mould Remediation
Mould spreads as long as the moisture stays. Call us for an assessment.