A commercial winter roof inspection involves a technician walking the full roof surface to evaluate the membrane, drainage systems, flashing, and rooftop equipment penetrations, followed by a written report detailing the roof’s condition and any recommended repairs. The process typically takes one to three hours depending on the size of the property and how much rooftop equipment is present.
Table of Contents
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Step 1: Initial walkthrough and membrane assessment
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Step 2: Drainage and ponding water evaluation
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Step 3: Checking equipment penetrations and flashing
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Step 4: Parapet walls and roof edges
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Step 5: Interior check for existing damage
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Step 6: The written report
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How does this differ from a standard maintenance visit?
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What property managers should prepare beforehand
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How to schedule your inspection
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FAQ
Step 1: Initial walkthrough and membrane assessment
The inspection begins with a full walkthrough of the roof surface. The technician examines the roofing membrane for cracks, blistering, punctures, or areas where the material has become brittle. On flat and low-slope commercial roofs, this walkthrough covers significantly more square footage than a typical residential inspection, so the technician works section by section to make sure nothing gets missed.
Any areas showing wear get marked for closer evaluation, and photos are typically taken to document the current condition for the report.
Step 2: Drainage and ponding water evaluation
Drainage is one of the most important things a commercial winter roof inspection evaluates, since flat roofs don’t shed water and snow the way sloped roofs do. The inspector checks roof drains, scuppers, and any internal drainage systems to confirm they’re clear and functioning.
Ponding water — areas where water collects rather than draining within 48 hours after rain — gets flagged specifically, since standing water that freezes during winter adds weight to the roof structure and can accelerate membrane deterioration in that area.
Step 3: Checking equipment penetrations and flashing
Commercial roofs typically host HVAC units, exhaust vents, plumbing stacks, and other equipment, each with a penetration point through the roofing membrane. These points are checked for proper sealing, since a compromised seal around equipment is one of the more common sources of leaks on commercial properties.
Flashing — the material sealing transitions between the roof and vertical surfaces like walls or curbs — gets the same close attention, checking for gaps, rust, or loosening that could let water through once winter weather arrives.
Step 4: Parapet walls and roof edges
Parapet walls, the raised edges around many flat commercial roofs, are checked for coping cap condition and proper sealing where the wall meets the roofing membrane. This area handles wind-driven rain and snow differently than the flat field of the roof, and coping caps that have loosened or shifted can let water into the wall assembly.
Roof edges without parapet walls get checked for proper edge metal installation, since this detail affects how well the roof handles wind uplift during storms.
Step 5: Interior check for existing damage
If access allows, the inspection often includes a look inside the building for signs of existing water intrusion — ceiling stains, damp insulation, or visible mold near the roofline. This step helps connect any interior symptoms to a specific location on the roof, which speeds up identifying the source once the inspector is back on the roof surface.
Step 6: The written report
Once the physical inspection is complete, you’ll receive a written report summarizing the roof’s overall condition, documenting any areas of concern with supporting photos, and outlining recommended next steps. Issues are typically prioritized so you know what needs attention before winter weather arrives versus what can be monitored and addressed on a longer timeline.
The report also typically includes an estimate of remaining service life for the roofing system as a whole, based on the condition of the membrane and how much wear is present relative to the roof’s age. This helps property managers plan longer-term budgeting decisions alongside the more immediate repair recommendations.
How does this differ from a standard maintenance visit?
A commercial winter roof inspection is more comprehensive than a routine maintenance check. While maintenance visits often focus on clearing debris and confirming drains are functioning, a full inspection evaluates the structural and material condition of the roofing system itself — membrane integrity, flashing seals, and the cumulative effects of weather exposure over time. Many facilities benefit from scheduling both: routine maintenance throughout the year, paired with a more thorough seasonal inspection ahead of winter.
What property managers should prepare beforehand
A few things make the inspection process smoother:
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Roof access information — confirming who has keys or codes for roof hatches or exterior ladder access
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History of known issues — sharing any previous leaks, repairs, or areas of concern helps the inspector focus attention appropriately
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Tenant notification — for multi-tenant buildings, letting occupants know rooftop work is scheduled avoids surprise and questions during the visit
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Recent weather events — mentioning any recent storms or heavy rain helps contextualize what the inspector finds, particularly around drainage performance
How to schedule your inspection
Roof Crafters has performed commercial roof inspections across Reno, Sparks, Carson City, and Northern Nevada since 1977. Our team walks every section of your roof and delivers a clear, prioritized report before winter weather sets in.
Schedule your commercial winter roof inspection: call 775.831.4188 or 775-200-9440, or visit roofcrafterswest.com.
FAQ
Does the inspection disrupt normal building operations? Rooftop inspections generally don’t disrupt operations inside the building, though tenant notification is still a good practice, especially for properties with rooftop access points near common areas.
What if the inspector finds an urgent issue? Anything requiring prompt attention gets flagged clearly in the report, with a recommendation on timeline based on the severity of what was found.
How is ponding water actually measured? Inspectors typically check for water that remains 48 hours or more after rainfall, which is the standard threshold used to distinguish normal drainage lag from an actual ponding issue.
Can multiple buildings be inspected in one visit? Yes, for portfolios with several properties in the same area, inspections can often be scheduled back-to-back to streamline the process for facilities teams managing multiple locations.