What should I do if I discover mold during a renovation?

Stop work immediately and assess the extent of the mold before proceeding. Mold discovery during renovation is common in Ottawa homes, especially in basements and older properties, and requires specific protocols to protect your health and ensure proper remediation.

Immediate Safety Steps

First, evacuate the work area and seal it off with plastic sheeting if possible. Don't disturb the mold further, as this releases spores into the air. Anyone who was exposed should shower and wash clothes in hot water. If the affected area is larger than 10 square feet, or if you have respiratory issues, consider this a serious situation requiring professional intervention.

Assessment and Testing

Small patches of surface mold (less than 10 sq ft) on non-porous surfaces can often be cleaned by homeowners using proper PPE - N95 masks, gloves, and eye protection. However, in Ottawa's climate with our freeze-thaw cycles and high humidity, mold often indicates deeper moisture issues that need professional assessment. Consider hiring a certified mold inspector to determine the extent and type of mold present.

Ottawa-Specific Considerations

Ontario's building standards require that mold remediation follow specific protocols. For areas over 10 square feet, you'll need a qualified mold remediation contractor. The work may require permits from the City of Ottawa, especially if it involves structural changes or HVAC modifications. Many Ottawa homes built before 1980 have moisture issues due to poor vapor barriers and foundation waterproofing standards of that era.

Professional Remediation Process

Certified remediation involves containment, HEPA filtration, proper disposal of contaminated materials, and addressing the root moisture cause. This typically costs $500-$3,000 for small areas, or $3,000-$15,000+ for extensive remediation in Ottawa. The process includes post-remediation testing to ensure successful cleanup.

Addressing Root Causes

Simply removing visible mold isn't enough - you must eliminate the moisture source. Common culprits in Ottawa homes include basement seepage, poor ventilation, plumbing leaks, or inadequate vapor barriers. This often requires waterproofing, improved ventilation, or repairs that should be completed before continuing your renovation.

Insurance and Documentation

Contact your insurance company immediately, as some policies cover mold remediation if it results from a covered peril like a burst pipe. Document everything with photos before and during remediation. Keep all receipts and professional reports for insurance claims and future home sales.

When to Resume Renovation

Only restart work after successful remediation, addressing moisture sources, and receiving clearance testing. This protects your investment and ensures your renovation doesn't trap new mold problems behind fresh finishes.

For complex mold situations discovered during renovation, contact Justyn Rook Contracting for guidance on integrating proper remediation with your renovation timeline and scope.