For building owners and property managers in Toronto and the GTA, autumn is an important time to assess a commercial flat roof before snow, freezing temperatures and repeated freeze-thaw cycles.
A roof inspection cannot prevent every winter leak, but it can uncover developing problems early and provide a practical basis for repairs and planning.
1. Check drains, scuppers and drainage paths
Leaves and debris can collect around roof drains and scuppers. Inspect strainers, outlets and the surrounding roof surface for obstruction and signs of standing water. Persistent ponding merits an assessment of drainage and roof condition rather than an assumption that clearing debris alone will solve the issue.
2. Look for membrane defects
Inspect the roof surface for cuts, punctures, lifted seams, deteriorated patches and unusual surface conditions. The appropriate repair depends on whether the building uses modified bitumen, built-up roofing, PVC, TPO or another roofing system. Avoid incompatible temporary patches.
3. Examine flashings and penetrations
Roof edges, parapets, HVAC curbs, plumbing vents, hatches and other penetrations can become vulnerable when flashings or terminations deteriorate. A professional inspection should assess these transitions and document defects that require attention.
4. Consider rooftop equipment and safe access
Mechanical equipment work can affect the roof membrane and flashing details. Coordinate inspection findings with mechanical contractors as appropriate. Wet, icy and snow-covered roofs create fall hazards: roof inspections and snow-related work should be undertaken by qualified people using appropriate safety procedures. Structural snow-load concerns require suitable professional review.
5. Request a documented inspection report
Ask for annotated photographs, the location and severity of observed defects, recommended repairs and any further investigation needed. Clearly separate confirmed conditions from suspected hidden moisture or other concerns.
6. Plan preventative maintenance
Roof maintenance should consider the roof’s age, condition, exposure, manufacturer requirements and previous leak history. Keeping inspection and repair records helps property managers prioritize work and forecast costs.
Pre-winter commercial roofing help in Toronto
Guycan has served commercial and industrial properties across Toronto and the Greater Toronto Area since 1975. To discuss a commercial roof inspection, repair or maintenance plan, call 416-298-1950 or visit our commercial roof maintenance page.
This article provides general information. Building-specific conditions require an appropriate professional assessment.