Mold Inspection & Removal in Ottawa
Certified mold inspection, removal, and air quality testing across Ottawa, Kanata, Orleans, Nepean, and Barrhaven. Free virtual inspection, same-day on-site response, and bilingual reports — backed by IICRC-certified inspectors and 15+ years working National Capital Region homes.
Our Mold Services in Ottawa
Mold Inspection Canada handles every step of a mold problem in Ottawa — diagnosis, mold testing, and certified mold removal. We never quote remediation without first finding the moisture source, so the problem stays fixed after we leave.
Mold Removal
IICRC-certified containment, HEPA filtration, and post-remediation verification testing. Ottawa mold removal scopes range from a single bathroom wall to whole-basement remediation in homes, offices, and rental properties.
Learn more →Mold Inspection
Visual assessment plus thermal imaging and moisture-meter readings to find hidden growth behind walls, under flooring, and inside HVAC. Full written report within 24 to 48 hours.
Learn more →Mold Testing & Lab Analysis
Air sampling and surface sampling for Ottawa mold testing, sent to an accredited Canadian lab. Reports include species identification (Aspergillus, Penicillium, Stachybotrys, Cladosporium) and indoor-vs-outdoor spore comparison.
Learn more →Air Quality Testing
Airborne spore counts, HVAC duct sampling, and post-flood air clearance for Ottawa homes and offices. Insurance-ready documentation, available in English or French.
Learn more →Mold Removal & Inspection Service Tiers for Ottawa Homes
Every Ottawa job starts with a free 15-minute virtual consultation so you only pay for the on-site work that matches your situation. Pricing is transparent and you get a written quote before any work begins.
Starter Visual Inspection
Homes under 2,000 sq ft with a specific area of concern
- Visual assessment of identified areas (basement, bathroom, attic, or single room)
- Moisture-meter readings on suspect surfaces
- Basic written report with photographs
- Prevention advice specific to your home
- Same-day availability across Ottawa-Carleton
Complete Assessment
Full-home option for real estate, post-flood claims, and unexplained health symptoms
- Whole-property visual assessment
- Thermal imaging and moisture mapping
- Air quality testing with laboratory analysis
- Detailed written report with photos, lab results, and remediation roadmap
- Follow-up consultation to review findings
- Insurance-ready documentation for claims
Emergency Mold Service
Active leaks, sewage events, post-fire smoke, or urgent rental disputes
- 2 to 4 hour Ottawa-area response
- Weekend and holiday availability
- Priority scheduling for active water-damage events
- Immediate safety assessment
- Emergency containment and source isolation
- Preliminary results same day; lab results within 48 hours
Why Ottawa Residents Choose Mold Inspection Canada
We’re not a generalist contractor running mold work as a side line — mold inspection, testing, and remediation are the only services we offer in the National Capital Region.
15+ Years Serving Ottawa
IICRC-certified work across Ottawa-Carleton since 2009. Over 1,000 Ottawa homes inspected, from Centretown stone duplexes to Riverside South new builds.
Six Industry Certifications
IICRC, IAC2, NORMI, NAMP, ACAC, and CRMI. Our inspectors complete annual continuing-education hours required for each credential.
Free Virtual Inspection
Diagnose your concern over a 15-minute video call before paying anything. We tell you what we’d recommend, what we wouldn’t, and which jobs are safe to handle yourself.
Price Match Guarantee
Show us a written quote from another IICRC-certified Ottawa company and we’ll match it. Apples-to-apples comparison, not bait pricing.
Bilingual Service
English and French inspectors and reports — relevant for Ottawa’s federal and Quebec-side rental population. Rapports en français disponibles.
Same-Day Response
Urgent cases get priority dispatch within Ottawa. Active water damage, suspected sewage backup, and post-fire situations move to the front of the queue.
Our Mold Inspection Process for Ottawa Properties
A complete mold inspection follows the same four-step protocol whether you live in a 1920s Glebe semi or a 2022 Findlay Creek new-build. The tools we use are tuned for Ottawa’s specific challenges — winter thermal bridging, basement freshet moisture, and humid summer crawl spaces.
Visual Assessment
We walk every accessible area: basement, attic, crawl space, bathrooms, kitchen, laundry, and HVAC mechanical room — looking for biological staining, peeling paint, efflorescence, and warped baseboards.
Advanced Technology
Thermal imaging reveals temperature differentials that indicate hidden moisture — especially important in Ottawa winters where cold spots behind insulation drive condensation. Moisture meters and hygrometers confirm readings.
Laboratory Testing
Air and surface samples go to an accredited Canadian laboratory. Results include species identification, spore counts per cubic metre, and indoor-vs-outdoor comparison so you can see if indoor air is genuinely elevated.
Detailed Bilingual Reports
Written report within 24 to 48 hours. Photographs, lab results, identified moisture sources, remediation scope, and clear next-step recommendations. English or French — ready for insurance, real estate, or rental disputes.
Basement Mold Removal in Ottawa: Why It’s Our #1 Service
Roughly 60% of the Ottawa basement mold jobs we see start with a moisture problem you can’t see from above grade. Three local factors stack against you: the Ottawa River freshet drives groundwater up against foundations every spring, frost heave from winter freeze-thaw cycles cracks concrete, and rapid May snowmelt overwhelms sump pumps. Ottawa Public Health publishes guidance on indoor mould prevention, and Health Canada’s Guide to addressing moisture and mould indoors both confirm that controlling the moisture source is the only durable fix — surface treatment alone always fails.
Why Ottawa basements are vulnerable
- Spring freshet — peak Ottawa River flow in April and May pushes groundwater up against foundation walls
- Hydrostatic pressure — saturated soil finds every micro-crack in poured concrete
- Frost heave — winter freeze-thaw cracks foundation seams
- Sump pump failures — rapid snowmelt overwhelms undersized or aging pumps
- Original-build drainage — pre-1980 homes often have minimal exterior drainage tile
Common signs we find
- Efflorescence (white mineral deposit) on poured-concrete walls
- Black mould around basement windows and at the floor-wall joint
- Musty odour that intensifies after rainfall or rapid snowmelt
- Peeling paint or bubbling drywall on the lower 600 mm of basement walls
- Visible growth on stored cardboard, fabric, or wood shelving
Our basement remediation process
- Moisture-source identification first — we won’t remediate without addressing the cause
- HEPA-filtered containment — full poly barriers and negative-air machines
- Demolition and removal — affected drywall, insulation, and framing where necessary
- Antimicrobial treatment + drying — industrial dehumidification to moisture-content thresholds
- Post-remediation air clearance — independent air sample before we sign off
For a complete guide to basement mould causes, identification, white-mold variants, and prevention, see our Basement Mold resource.
Air Quality Testing in Ottawa Homes and Offices
Sometimes a visual inspection isn’t enough. Hidden mould behind walls or inside HVAC ducts releases airborne spores that affect occupants without showing surface evidence. Air quality testing measures what’s actually in the air you breathe.
Who needs it
- Homes with unexplained respiratory symptoms, headaches, or fatigue
- Post-flood or post-leak assessments where visible damage is unclear
- Real estate transactions — documented indoor air quality
- Rental disputes — third-party documentation for tenants or landlords
- Office HVAC complaints across downtown Ottawa
What we test
- Airborne spore counts — Aspergillus, Penicillium, Stachybotrys, Cladosporium
- Species identification — different species pose different health risks
- Indoor-vs-outdoor comparison — outdoor reference sample for context
- HVAC duct sampling — supply, return, and main trunk for homes with central air
Reports
- Accredited Canadian lab results
- Interpretation in plain language
- Remediation recommendations if needed
- Bilingual on request
- 48-hour turnaround standard; 24-hour rush for real estate closings
See our Air Sampling for Mold Inspection guide for the technical detail on what we collect and how labs process it.
Ottawa Neighborhoods We Serve
Ottawa’s housing stock spans nearly 150 years — from 1880s Sandy Hill stone duplexes to 2024 Riverside South new builds. Each era brings its own moisture and mould signatures, and our inspectors recognize the patterns specific to each.
Ottawa Core and Inner Suburbs
Centretown & The Glebe
Pre-1940 stone foundations with basement moisture from poor original drainage. Heritage character means careful, low-impact remediation methods.
Westboro & Hintonburg
1950s and 60s bungalows where attic ventilation issues commonly drive ceiling mould. Original cedar-shake roofs replaced with asphalt often left soffit venting blocked.
Alta Vista & Vanier
Mid-century residential with combined basement and bathroom mould patterns. Window seal failures on aging vinyl windows are a common moisture entry point.
Rockcliffe Park & Sandy Hill
Heritage properties with hidden moisture behind original plaster walls. Thermal imaging is essential — visual signs often appear after significant damage has occurred.
West End
Kanata & Stittsville
1970s and 80s split-levels with common basement moisture from original foundation drainage. See our Kanata mold inspection and removal page for deeper local detail.
Bells Corners & Crystal Beach
Older bungalows with aging roofs and attic condensation. Bathroom-fan-venting-into-attic is a recurring discovery here.
Bridlewood & Beaverbrook
Mixed eras with bathroom fan venting issues. Many original installations vent into the attic rather than outdoors — a guaranteed mould generator.
Nepean & Barrhaven
Newer suburban builds where HVAC mould and crawl-space moisture concerns dominate. Tightly sealed envelopes require active humidity management.
East End and South
Orleans
1990s suburban with basement humidity and seasonal moisture issues. Many homes have unfinished crawl spaces under additions that go uninspected for years.
Gloucester & Cyrville
Mid-era residential with window seal and basement mould issues. Frost-line foundation damage common from heavy winter freeze-thaw cycles.
Greely & Manotick
Rural properties with well-water moisture and crawl-space risks. Septic-system proximity to foundations occasionally drives unusual moisture patterns.
Riverside South & Findlay Creek
2010s and 2020s new-builds — envelope-sealed homes that require active humidity management. Common discovery: HVAC commissioning errors that leave duct condensation in summer.
We also serve Carleton Place, Carlsbad Springs, Cumberland, Russell, Embrun, and surrounding Eastern Ontario communities.
Ottawa Mold Problems We’ve Solved
Real Ottawa-area properties from our inspection logs. Names and exact addresses redacted; technical detail preserved.
1960s Bungalow — Attic Mould
Dark ceiling staining and a musty smell that worsened in winter. Thermal imaging located an 8 sq ft Stachybotrys growth above the bathroom, driven by an exhaust fan venting into the attic instead of outdoors.
Split-Level — Post-Freshet Basement
Finished basement flood discovered six weeks after the April Ottawa River freshet. Air sampling found elevated Aspergillus and Penicillium throughout the lower level.
New-Build — HVAC Mould
4-year-old home with persistent musty odour in master bedroom that intensified when AC ran. Duct sampling traced mould to 1.5 m of supply trunk above the bathroom, where the exhaust fan vented near a fresh-air intake.
What Ottawa Homeowners Say About Us
Real reviews from real Ottawa customers. Trustindex aggregates additional reviews below.
Catherine Brennan
Westboro
Found the source of basement moisture other inspectors missed — turned out to be a downspout dumping into the wrong place. Bilingual report ready for our insurance claim within 48 hours. Fair pricing and they didn’t try to upsell remediation when we just needed the inspection.
David Tremblay
Orleans
HVAC mould diagnosis was thorough and they wouldn’t quote remediation until we fixed the bathroom exhaust first. That honesty saved us from paying twice. The technician explained everything clearly in both languages.
Maria Lavoie
Kanata
Free virtual inspection caught the issue before we paid for an on-site visit. Same-day callback, IICRC-certified work, and the price-match guarantee meant we got the best Ottawa quote without having to shop around for hours.
Get Your Free Virtual Mold Inspection in Ottawa
Whether you need a single-room inspection, full removal, or one-off air quality testing, start with a free 15-minute virtual consultation. Our Ottawa team will review your photos, ask the right diagnostic questions, and recommend the next step.
Free Estimate Form
Frequently Asked Questions
Quick answers to the questions Ottawa homeowners ask us most.
How much does mold removal cost in Ottawa?
Ottawa mould removal jobs typically range from $500 for a small bathroom or single-wall remediation up to $15,000+ for whole-basement work after major water damage. Variables are scope, accessibility, containment requirements, and whether structural materials need replacement. We provide a written quote after a free virtual consultation, and we price-match any certified competitor. For typical price ranges across all room types, see our mold remediation cost guide.
How long does mold removal take for a typical Ottawa basement?
A small basement job (under 10 sq ft of visible growth) usually takes one to two days including containment setup, removal, and drying. A moderate basement job with finished-wall demolition and dehumidification runs three to five days. Whole-basement remediation after a major freshet flood can take seven to ten days, plus time for post-remediation air-clearance testing to come back from the lab. We always tell you the realistic timeline up front.
Do you do both mold inspection and removal in Ottawa?
Yes — we handle the full sequence: free virtual consultation, on-site inspection, laboratory testing, certified remediation, and post-remediation air-clearance verification. Some homeowners only need the inspection (often for a real estate transaction or rental dispute). Others come to us mid-project after another contractor identified mould but they want an independent assessment before remediation. We’re comfortable doing any part of the chain.
Why are Ottawa basements so prone to mould?
Three local factors stack up against Ottawa basements: the spring Ottawa River freshet pushes groundwater against foundations every April and May; winter freeze-thaw cycles cause frost heave that cracks concrete; and rapid snowmelt overwhelms sump pumps. Older Ottawa homes (pre-1980) often have minimal exterior drainage tile, which compounds the problem. The fix is always source-control first — we won’t remediate a basement without first addressing the moisture cause, or the mould will return within a year.
Is professional mold removal worth the cost?
For visible growth larger than 10 sq ft, for any mould involving suspected Stachybotrys (black mould), or for any case where the moisture source isn’t obvious, yes — professional removal pays for itself. Self-treatment without proper containment spreads spores throughout the home and trains the next round of growth. Health Canada’s guidance recommends professional remediation for any growth over 1 square metre or in HVAC systems. For DIY-versus-professional decision guidance, see Professional vs DIY Mold Removal.
What certifications should an Ottawa mold inspector have?
Look for IICRC certification at minimum — that’s the Institute of Inspection, Cleaning and Restoration Certification, the industry-recognized credential for mould remediation technicians. Additional credentials that matter: IAC2 (mould inspection), NORMI (mould remediation), ACAC (air quality), CRMI (residential mould inspection), and NAMP (mould assessment professional). An inspector with only a general home-inspection licence is not certified for mould-specific work. Our team holds all six — see how to choose a mold inspection company in Canada for the full evaluation checklist.
Can mould grow in Ottawa’s cold winters?
Yes — and this surprises homeowners. Winter mould growth is driven by indoor condensation: warm humid indoor air hits cold exterior walls and condenses behind insulation or on window frames. We see significant winter mould growth in attics (warm bathroom air vents into cold attic space) and on the indoor side of poorly-insulated walls. Outdoor temperature doesn’t matter to mould — indoor moisture and temperature are what counts.
Which Ottawa neighborhoods do you serve?
All of Ottawa-Carleton plus surrounding Eastern Ontario communities. Confirmed service areas include Centretown, The Glebe, Westboro, Hintonburg, Alta Vista, Vanier, Rockcliffe Park, Sandy Hill, Kanata, Stittsville, Bells Corners, Crystal Beach, Bridlewood, Beaverbrook, Nepean, Barrhaven, Orleans, Gloucester, Cyrville, Greely, Manotick, Riverside South, Findlay Creek, Carleton Place, Carlsbad Springs, Cumberland, Russell, and Embrun. If you’re nearby and not listed, call 613-701-9893 — we likely cover you.