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SteriMobile MoldInspection BANNER Montreal’s Trusted Experts for
Basement Mold Removal
Fast response, thorough remediation,
guaranteed results.
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Basement Mold Remediation Services in Montreal

Steri Mobile offers certified basement mold remediation services for homes and businesses across Montreal, the West Island, Laval, the North Shore, and the South Shore. Our services include mold inspection, safe removal of contaminated materials, remediation and identification of the moisture source so that you can address the problem at its root and prevent it from coming back. We also offer mold remediation services for crawl spaces.

Mold causes and prevention - effective drainage

When to Call in Mold Remediation Experts

Steri Mobile offers effective, warrantied basement mold remediation services. If you notice one or more of the following signs, don’t wait any longer. Contact us!

  • Persistent musty odour even after cleaning
  • Stains or discoloration on concrete, drywall, joists, or baseboards
  • Condensation on walls or pipes, or humidity consistently above 60%
  • Past flooding, seepage, or leaks, even if the area appears to have dried
  • Allergy or asthma symptoms that improve when you’re away from home

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Why Basement Mold Is a Serious Problem

Basements are especially vulnerable to mold because they often have higher humidity, limited ventilation, and hidden moisture issues. Left untreated, basement mold can:

  • Impact health (musty odours, headaches, aggravated allergies and asthma)
  • Damage structure and finishes (staining, decay, insulation deterioration)
  • Spread to upper floors through your HVAC and stairwells

If you notice a persistent musty smell, discoloration on walls or joists, or condensation on cold concrete, it’s time to act.

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Our Basement Mold Remediation Process

For over 15 years, Steri Mobile has been using a proven process for basement mold remediation. Our approach is thorough, low-disruption, and focus on long-term results. It includes:

  1. A detailed inspection to identify visible mold and underlying moisture source
  2. Containment and HEPA filtration to control dust and airborne spores
  3. Safe removal of contaminated materials where required
  4. A proven remediation treatment designed to remove mold, inhibit regrowth, and reduce airborne contaminants
  5. Clear documentation of the work completed

LEARN MORE ABOUT OUR MOLD REMEDIATION PROCESS

Common Causes of Basement Mold

Basement mold can develop for many reasons, but most cases are linked to recurring moisture, water intrusion, condensation, or poor ventilation.

Exterior Water & Drainage

  • Poor grading/landscaping that slopes toward the house (water pools at the foundation)
  • Clogged gutters or short downspouts (runoff not directed 6–10 ft away)
  • Improper or blocked drainage behind siding/brick (weep holes/flashing issues)

Foundation & Structure

  • Cracked or oversaturated concrete foundations (cement is porous and wicks moisture)
  • Active seepage through cold joints or tie-rod holes
  • Failed/deteriorated exterior waterproofing or footing drains
  • Missing, blocked or failed French drain

Sump, Backflow & Events

  • Sump pump failures, stuck floats, or power loss
  • Backflow/backup from floor drains or sewer events

Plumbing & Appliances

  • Leaky supply/drain lines, bathroom stacks, or valves
  • Appliances leaking or sweating (washer, water heater, softener)

Windows & Deck Interfaces

  • Deteriorated window caulking or weatherstripping (leaks at window wells)
  • Improperly installed deck flashing letting water track into the wall assembly

Humidity, Condensation & Ventilation

  • High relative humidity (over 60%) due to limited ventilation
  • Condensation on cold concrete walls, floors, or uninsulated pipes
  • Stagnant air in cold rooms, storage, or utility areas

Insulation & Air Sealing Gaps

  • Missing/insufficient insulation on rim joists and foundation walls
  • Degraded or improperly installed vapor barrier allowing moisture to pass through wall assemblies
  • Unsealed penetrations allowing warm, moist air to meet cold surfaces

How to Prevent Future Mold Growth

We help you break the cycle by identifying what feeds mold in your basement. Given that every situation is different, we will identify the reasons that pertain to your specific problem(s).

Control Humidity

Keep humidity below 50% with a dehumidifier sized appropriately for your basement.

Improve Airflow

Add ventilation, keep supply/return paths open, avoid over-packed storage against foundation walls.

Eliminate Water Entry

Seal cracks, redirect downspouts, and maintain sump pumps and backwater valves.

Insulate Cold Surfaces

Reduce condensation by insulating cold walls, pipes, and other vulnerable surfaces.

Mold Remediation Specialists You Can Count On

Mold, especially black mold, represents a serious health and structural concern in any property. Steri Mobile delivers certified mold removal and remediation services for long-lasting results. Let our team help you restore a clean, healthy environment. Reach out today!

REQUEST A FREE ESTIMATE

CALL 514-922-6366

Services

  • Mold Removal
  • Attic Mold Removal
  • Air Treatment Systems

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Steri Mobile
48 Rue de Saint Tropez
Kirkland, QC
H9J 2K6
Canada
(514) 922-6966
info@sterimobile.net

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