Commercial Flat Roof Inspection and Condition Reports
A documented roof condition report for property managers and owners who need the facts before the budget.
A commercial roof inspection is a walked survey of the roof that produces a written, photographed condition report: the assembly build-up, every deficiency ranked by priority, the state of drains and flashings, moisture findings, and an opinion on remaining service life. NorthCan Roofing inspects flat and low-slope roofs across Toronto and the GTA. Call 416-456-0777.
What is in a roof condition report?
The report is written to be handed to an owner, a board or a head office without a phone call to explain it. It contains:
- Building and roof identification. Address, roof areas mapped and numbered, approximate area of each, access route and roof access limitations.
- The assembly. Deck type, vapour barrier, insulation type and thickness, cover board and membrane, confirmed by test cut where the build-up is unknown and you authorise the cut.
- Deficiency schedule. Every finding with a photograph, a location on the roof plan and a priority: immediate, this season, or plan and monitor.
- Drainage. Drains, strainers, sumps, scuppers and overflow provision, plus a note of where water is ponding and how long after rain it stays.
- Details and penetrations. Base flashing heights, cant strips, cap flashing at parapets, curbs, pitch pockets, gas lines, conduit and equipment supports.
- Moisture findings. The results of the survey, showing suspected wet areas on the plan.
- Safety observations. Guardrails, anchor points, hatches and ladders, since your service technicians work up there too.
- Remaining service life opinion and recommendations, with the repair, maintain or replace path set out plainly.
The report is delivered as a document you keep, not as a verbal summary on the day. Photographs are numbered and keyed to the roof plan so a deficiency described in the schedule can be found again by a contractor who was never on site, which matters when the work is tendered. Where a roof has several areas of different ages or assemblies, each area is reported separately, because a building rarely needs the same decision everywhere.
Why start with an inspection rather than a quote?
Because a quote answers a question you have not confirmed yet. A repair quote assumes the field is sound. A replacement quote assumes it is not. The inspection is what tells you which sentence is true, and it costs a fraction of either project.
For property managers it does something else as well. It converts a vague worry into a document with dates, photographs and priorities that can go into a reserve fund study, a capital plan, an owner report or a tender package. When the leak eventually happens, the inspection file is also the evidence that the building was being looked after, which matters to insurers. Our wider offer for managed portfolios is on the property managers page.
It is also the lowest-commitment way to meet a contractor. You get a document either way, and if the report says maintain rather than replace, you have saved a capital cycle.
How often should a commercial roof be inspected?
Twice a year is the standard rhythm for a low-slope roof in southern Ontario, plus event-driven visits.
- Spring, after the freeze-thaw season. This is when winter damage shows: split seams, cracked base flashings, cap flashing loosened by ice, drains damaged by ice expansion and membrane fatigued by movement.
- Fall, before the heavy rain and the first snow. Drains and strainers cleared of leaves, details checked, loose metal refastened. This visit prevents more emergency calls than any other single activity.
- After significant weather. High wind, hail or an unusually heavy rain event. Wind damage typically starts at corners and perimeters, where uplift is highest.
- After anyone else works on the roof. New rooftop units, satellite mounts, electrical work, window cleaning anchors. A surprising share of leaks are installed by other trades.
- Before a purchase or a lease commitment, when the roof is a negotiating item.
Scheduling those visits under a single agreement, with the documentation kept in one file, is what our commercial roof maintenance program does. The inspection is the entry point; the program is the habit.
One more trigger is worth adding: any winter in which snow is removed from the roof. Snow clearing done with the wrong tools, by people who do not know where the membrane, the drains and the skylights are, causes real damage, and it is far better found in April than in a November storm.
What is an infrared or moisture survey?
A visual walk finds what is visible. It cannot tell you whether the insulation under an intact-looking membrane is saturated, and that single fact decides between a repair and a replacement.
Infrared thermography is done after sunset on a dry roof. Dry insulation gives up the day's heat quickly; wet insulation holds it and shows as a warm signature on the scan. The survey needs the right conditions, meaning a dry surface, no snow and a clear enough sky, so it is scheduled rather than done on demand.
Capacitance and impedance meters read moisture through the membrane on a grid and are useful in more variable conditions, though they read shallower and are most useful to confirm and bound the areas of interest.
Test cuts are the ground truth. A small section is cut out, the layers are examined and measured, the moisture in the insulation is felt and weighed rather than inferred, and the cut is permanently repaired the same day. We recommend at least one cut in a suspected wet area and one in an apparently sound area for comparison.
Together these draw the wet area on the roof plan. That drawing is what turns a replacement quote from a guess into a scope. See flat roof replacement for what happens next.
What does remaining service life actually mean?
It is a professional opinion about how much useful life the roof has left before it needs replacement, given its current condition and assuming reasonable maintenance. It is not a warranty, a prediction or a promise, and any contractor who states it as a fixed figure is overselling it.
The opinion is built from what we can observe: how much of the insulation is wet, the condition of the membrane surface across the field, whether the details are original or repaired, how the drainage performs, the condition of the deck where visible, and how the roof is used and maintained. Two roofs installed on the same day can be years apart in condition because one drains and one ponds.
We express it as a range with the reasoning attached, and we say what would shorten it, for example unresolved ponding, and what would extend it, for example correcting the drainage and getting the flashings back into good order. That is the form a capital planner can actually use, because it tells them what changes the number.
How do you book an inspection?
Call 416-456-0777 or use the contact page with your address, the approximate roof area and how the roof is accessed. We confirm attendance, walk the roof, complete the survey and return the written report with photographs. If you want the moisture survey included, say so when booking, because infrared work is scheduled around dry evening conditions.
If the report recommends work, we quote it separately and clearly, and you are free to tender it. Depending on the findings, the next step is usually flat roof repairs, a maintenance agreement, or a planned replacement. Everything we do on low-slope buildings is summarised on commercial roofing. WSIB coverage and certificates of insurance are provided on request.
Frequently asked questions
How long does a commercial roof inspection take?
A single-area roof on a small commercial building is usually walked within a couple of hours. Large multi-level or multi-area industrial roofs take most of a day, and a night visit is added if infrared is included. The written report follows once the photographs and findings are compiled.
Do you need roof access arranged in advance?
Yes. Tell us how the roof is reached: interior hatch, fixed ladder, exterior stair or lift. If access needs a key, an escort, a permit or a site orientation, we arrange it before attending. Where the only access is by ladder to an unguarded edge, we bring our own fall protection rather than improvising.
Can you inspect a roof that another contractor installed?
Yes, and most of the roofs we inspect were installed by someone else. Where a manufacturer system warranty is in place, tell us the manufacturer and reference number so the report notes any conditions attached to it, including maintenance obligations that could affect coverage.
Is a roof inspection the same as a building condition assessment?
No. A building condition assessment covers the whole property and is normally produced by an engineering firm. Our report covers the roof assembly in depth: the build-up, the details, the drainage and the moisture. The two work well together, and our report can be dropped into a broader assessment.
What if you find something urgent during the inspection?
We tell you on the day rather than waiting for the report. If water is entering or a hazard exists, we describe the make-safe option immediately. Urgent items are also flagged at the head of the deficiency schedule so nothing important is buried in the middle of a document.
Ready for your free roof assessment?
Tell us the address, the roof size and what you are seeing. We will book a time to get up there and put it in writing.
Call 416-456-0777 to book. Roof leaking right now? Our 24/7 emergency line is 416-450-1818.
Call 416-456-0777