Mould Remediation and Mould Removal

When Mould Damages Your Property

Mould spores are a natural part of the environment. They exist both indoors and outdoors, floating in the air much like pollen and thriving in dark, damp spaces. Mould can become a problem indoors when spores land on a wet surface and begin to grow. To multiply and form colonies, spores need moisture, a food source – such as drywall, wall paper glue, wood or carpet – and lack of light.

In severe cases, mould can cause major property loss, devalue a building, and even lead to litigation. Within 24–48 hours, mould can spread enough to cause health issues, such as allergic reactions (hay fever-type symptoms, skin rashes) and potentially severe respiratory symptoms.

Common causes of massive mould growth:

  • Snow and ice melts from winter storms
  • Flooding from heavy rain fall
  • Collateral water damage from fire fighting
  • Sewer back-ups
  • Ruptured hot water tanks
  • High indoor humidity (above 45 percent), particularly in basements and in attics where the roof has been damaged

How we can help

If your home or business has suffered water damage, mould is an immediate risk. Getting professional assistance is critical in the first 48 hours to stop mould before it starts to spread. If you do find mould, do not try to clean it up yourself – the affected area needs to be professionally contained.

FirstOnSite specialists are certified by the Institute of Inspection Cleaning and Restoration Certification (IICRC). They have been trained in proper drying procedures and the safe use of anti-microbial treatments.

We follow a step-by-step process to return your property to a safe environment:

  • Determining amount and source of mould.
  • Containing the area, including setting up negative air chambers to prevent spores from reaching non-affected areas
  • Cleaning and disinfecting exposed building areas, using anti-fungal and anti-microbial treatments. Affected soft items like bedding, clothing and rugs are cleaned with the Esporta Wash System™, restoring them to “hospital-level” bacterial standards.
  • Removing affected wall material, carpet fabrics and any other building materials.
  • Restoring the area fully, through replacing drywall, painting, installing new carpet, and making any other repairs needed.
  • Conducting post-remediation clearance testing, carried out by an indoor environmental professional.

Our dedicated resources and state-of-the-art equipment are stationed across Canada to serve at a moment’s notice. We are available to respond to emergency calls 24 hours/day, 7 days a week.

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Homeowner’s Resources

Homeowner’s Guide: How to Deal With a Disaster
Frequently Asked Questions
“I am just writing to let you know how pleased I am with the work that was done. Your men were excellent workers and did a beautiful cleanup; I didn’t have to do a thing and the job is breathtaking.”

Marlene G., Dartmouth, Nova Scotia

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Commercial Client Services

Disaster Restoration Services
Priority Response Emergency Plan
Case Studies
“Thank you for all your help! The service provided was excellent and I will definitely use FirstOnSite for my next emergency (which I hope never happens).”


Commercial Customer, Ontario

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For Emergency Disaster Restoration Services, Call 1.877.778.6731

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For Emergency Disaster Restoration Services, Call 1.877.778.6731