What a commercial roof inspection involves
A commercial roof inspection is a documented survey of the roof system carried out on the roof by a roofing provider. NRCA describes it as a thorough visual inspection of the roof system and adjacent surfaces, noting any abnormal conditions or deterioration. On the low-slope roofs common to stores, restaurants and office buildings, a complete inspection covers:
- Field of the roof. Membrane surface, seams and laps, blisters, splits, punctures, wrinkles, and loss of surfacing, granules or coating.
- Perimeter. Edge metal, coping on parapet walls, base flashings and counterflashings, and the condition of walls that rise above the roof.
- Penetrations. Pipes, vents, conduit, pitch pans and the curbs under HVAC units, exhaust fans and other rooftop equipment.
- Drainage. Roof drains, strainers, scuppers, gutters and downspouts, plus any standing water or debris.
- Openings. Roof hatches, skylights and smoke vents, including their curbs and seals.
- Interior. Ceiling stains, wet tiles and the underside of the deck where it can be seen, matched to roof areas above.
- Trade damage. Cuts, dropped fasteners and screws left behind after rooftop equipment service.
Where the inspection points to water inside the roof system, a visual survey is not enough. ASTM C1153 sets out a practice for locating wet insulation in roofing systems with insulation above the deck, using infrared imaging at night from the ground or the air. The standard also addresses verifying the infrared data with invasive test methods, and those results help decide whether an area needs repair or commercial roof replacement.
Each inspection should end in a condition report: a roof plan marked with each finding, photos, a priority for each item (urgent, next scheduled visit or capital planning) and an estimate of remaining service life where the provider can support one.
Codes, standards and requirements
Codes are adopted and amended locally, and the code official for each location decides what applies. These model requirements bear most often on a commercial roof inspection.
- Roofs must not admit rain. The 2024 International Property Maintenance Code (IPMC), Section 304.7, as summarized by NRCA, requires roofs and flashings to be sound, tight and free of defects that admit rain, with drainage adequate to prevent dampness and deterioration in walls and the interior of the structure. Roof drains, gutters and downspouts must be kept in good repair and free of obstructions, and roof drainage may not be discharged in a way that creates a public nuisance.
- Unsafe conditions. IPMC Section 304.1.1 lists roofing materials and components with defects that admit rain, roof surfaces with inadequate drainage, and roof framing with signs of deterioration or fatigue among potentially unsafe conditions. NRCA notes these are assessed and, where necessary, addressed under the International Existing Building Code, International Building Code or International Residential Code, as applicable.
- Fire-resistance ratings. IPMC Section 703.1, as summarized by NRCA, requires fire-resistance ratings to be maintained, rated elements to be visually inspected by the owner every year, and records of inspections and repairs to be kept. NRCA points to roof examples such as aggregate scour, granule loss and eroded or flaking coatings.
- Fall protection. Under OSHA’s general industry standard, 29 CFR 1910.28(b)(13), work less than 6 feet from the edge of a low-slope roof requires guardrails, a safety net, travel restraint or personal fall arrest. From 6 to under 15 feet, a designated area is allowed only for work that is both infrequent and temporary. A narrow exemption in 1910.28(a)(2)(ii) covers assessing conditions before work starts or after it ends, but not where compliant fall protection is installed and available. Roofing repairs on low-slope roofs fall under the construction standard, 29 CFR 1926.501(b)(10). Each provider is responsible for its own crew’s compliance.
Preventive maintenance schedule for commercial roofs
Planned inspections catch open seams, loose flashing and blocked drains while they are still small repairs, which means fewer emergency leak calls and a longer service life for the roof. They also build the dated record that warranty claims, insurance claims and code compliance depend on.
| Task | Recommended frequency | Basis |
|---|---|---|
| Full roof inspection with condition report | Twice a year, preferably spring and fall | NRCA; FEMA Fact Sheet 3.3.2 |
| Inspection after hail, high wind, a hurricane or a tornado | After each event | NRCA; FEMA Fact Sheet 3.3.2 |
| Repair items found during an inspection | Promptly after the inspection | FEMA Fact Sheet 3.3.2 |
| Clear drains, strainers, scuppers, gutters and downspouts | At each inspection, more often near trees | IPMC Section 304.7 requires them free of obstructions; frequency is a Facility First program default, adjusted per site |
| Visual inspection of fire-resistance-rated roof elements, with records | Every year, where the local code applies | IPMC Section 703.1, as summarized by NRCA |
| Check curbs, seals and membrane around equipment after rooftop trade work | After each rooftop service visit | Facility First program default, adjusted per site |
| Confirm warranty inspection and maintenance conditions are met | Every year | Manufacturer instructions; annual review is a Facility First program default |
| Infrared moisture survey | When inspections or leak history point to wet insulation | Facility First program default, adjusted per site; method per ASTM C1153 |
| Update the roof plan and findings list | At each inspection | Facility First program default, adjusted per site |
The authority having jurisdiction, the roof manufacturer and the property’s insurer can require more frequent service, and each location’s schedule is set in its program and recorded on every visit.
How often a commercial roof should be inspected
NRCA recommends inspecting roof systems at least twice a year, preferably in spring and fall, with additional inspections after severe weather such as hurricanes, tornadoes or hailstorms. FEMA’s guidance for low-slope roofs gives the same twice-yearly schedule, adds inspections after high-wind events, and says needed repairs should be completed quickly after the inspection to prevent further damage. NRCA does not recommend that inexperienced property staff go onto roofs, so inspections are a job for a qualified roofing provider.
Signs that an inspection is needed before the next scheduled visit:
- A new ceiling stain, drip or wet ceiling tile
- Water standing on the roof well after rain stops
- Hail, high wind or heavy snow in the area
- Debris, vegetation or blocked drains seen from the ground
- Edge metal, coping or flashing that looks loose or displaced
Records to keep
An inspection file supports warranty and storm insurance claims and capital planning. For each roof, keep:
- A roof plan showing roof areas, drains, equipment, hatches and skylights
- Roof system type, installation date, installer, manufacturer and warranty terms
- Every inspection report with dated photos, including post-storm inspections
- The findings list for each visit, with the priority assigned and the date each item was closed
- Infrared survey results and the invasive test results that verified them
- Annual visual inspection records for fire-resistance-rated roof elements, where the local code requires them
- A roof access log showing every trade that went onto the roof and why
How Facility First runs commercial roof inspections across a portfolio
Facility First manages the program. Vetted local roofing providers holding the required licenses and insurance carry out each inspection.
- Schedule. Spring and fall inspections are set for each location, and post-storm inspections are added when severe weather hits a market.
- Request and triage. Unscheduled inspections are requested through the platform or by phone. Facility First checks the roof record for system type, warranty conditions and earlier leaks.
- Dispatch. A roofing provider in the location’s market receives the work order, the roof plan and the open findings from the last visit.
- Inspection and report. The provider inspects, photographs each finding and files a condition report against the roof.
- Verification. Facility First checks the report against the scope and the previous report, so repeated findings are visible.
- Follow-up and invoice. Small items can be repaired on the same visit within the client’s approval limits. Larger items are quoted and routed to flat roof repair, TPO roof repair or replacement planning. All work is invoiced in one format.
Findings feed commercial roof maintenance schedules and a portfolio view of which roofs need capital funds first. See facility condition assessment. Where a damaged roof hatch or skylight leaves a location unsecured, McCray can post an officer until the work is complete. See Security by McCray.
What affects the cost of a commercial roof inspection
- Roof area and the number of separate roof levels
- Roof height, access method and the fall protection setup required
- Amount of rooftop equipment and penetrations to check
- Whether the scope is visual only or includes an infrared survey and core tests
- Warranty conditions that require a manufacturer-approved provider
- Whether minor repairs are done on the same visit
Roof inspections for retail stores, restaurants and offices
Retail stores. Roof access is often through a hatch in the stockroom or through the landlord. In shopping centers and leased buildings, the lease decides whether the tenant or the landlord is responsible for the roof, and that is confirmed before the inspection is booked.
Restaurants. Roofs carry exhaust fans, make-up air units and many penetrations. The area around each fan and curb gets close attention, and leaks over food preparation or storage areas are treated as food safety concerns.
Offices. Inspections follow tenant schedules and building rules for roof access. Leaks over server rooms, electrical rooms and records storage are flagged as priorities.
Frequently asked questions
How often should a commercial roof be inspected?
NRCA recommends at least twice a year, preferably in spring and fall, and after severe weather such as hurricanes, tornadoes or hailstorms. FEMA guidance for low-slope roofs gives the same schedule.
What does a commercial roof inspection include?
A visual survey of the membrane, seams, flashings, edge metal, penetrations, equipment curbs, drains, hatches and skylights, with interior checks for leaks. It ends in a condition report with photos and a priority for each finding.
When is an infrared roof survey needed?
When an inspection or leak history suggests water inside the roof system. ASTM C1153 covers night-time infrared imaging to locate wet insulation and verifying the results with invasive test methods.
Should a roof be inspected after a storm?
Yes. NRCA recommends added inspections after severe weather such as hailstorms, and FEMA after high-wind events. A dated report also records the roof’s condition for an insurance claim.
Can store or office staff inspect the roof themselves?
NRCA does not recommend that inexperienced property staff go onto roofs. Staff can report interior stains and visible debris, and a qualified roofing provider carries out the inspection.
Sources
- NRCA, Professional Roofing: Tech Today, October 2013 (inspection frequency and scope)
- NRCA, Professional Roofing: Maintaining compliance, February 2024 (2024 IPMC Sections 304.7, 304.1.1 and 703.1)
- FEMA: Hurricane and Flood Mitigation Handbook for Public Facilities (2022), Fact Sheet 3.3.2, Roof Systems, Low-Slope Roofs
- ASTM: C1153, Standard Practice for Location of Wet Insulation in Roofing Systems Using Infrared Imaging
- OSHA: 29 CFR 1910.28, Duty to have fall protection and falling object protection
- OSHA: 29 CFR 1926.501, Duty to have fall protection (construction)