Home › Blog › The fall commercial roof maintenance checklist — what your facility team can safely do before winter
A fall commercial roof maintenance checklist for facility teams: the 12 checks staff can do safely, the OSHA edge rules first, and when to call a roofer.
Most commercial roof leaks that show up in January were set up in October. Leaves block a drain, water stands where it shouldn't, a freeze opens a seam that was only tired — and the first anyone hears of it is a ceiling tile in a tenant's office.
The good news is that the work that prevents most of it isn't roofing. It is housekeeping, done by your own facility team, on a schedule. This commercial roof maintenance checklist covers what in-house staff can do safely, how to make it repeatable, and exactly where it stops being their job.
Industry guidance, including the National Roofing Contractors Association's, is to look at a low-slope roof at least twice a year — spring and fall — and again after any severe storm. Fall is the one that matters most in the DMV, because it is the last look before freeze-thaw season.
This is the part that gets skipped, and it is the part with legal teeth. If your employees go onto the roof, OSHA's general-industry walking-working surfaces rules apply. A low-slope roof is anything at or under a 4-in-12 pitch, which covers essentially every commercial flat roof.
The short version of 29 CFR 1910.28(b)(13):
| Distance from the roof edge | What OSHA requires |
|---|---|
| Less than 6 feet | Guardrail, safety net, travel restraint or personal fall arrest — no exceptions |
| 6 to 15 feet | The same, except a designated area marked with a warning line is allowed for work that is both infrequent and temporary |
| 15 feet or more | The same options, or a designated area — plus an enforced work rule that nobody goes within 15 feet of the edge without fall protection |
Two more rules catch facility teams out:
Practical policy that keeps you compliant for a routine walk: stay 15 feet or more from every edge unless someone is properly protected, never go up alone, go up in daylight on a dry, calm day, and close the hatch behind you. Have your safety officer confirm this against your own written program — it is the basis for a policy, not a substitute for one.
If a check on this list requires standing near an edge, it is not a facility-team check. Photograph it from 15 feet back and put it on the roofer's list.
Do these in order, every fall, from the same route across the roof.
| # | Check | What you are looking for | Roofer's job when… |
|---|---|---|---|
| 1 | Roof drains | Leaves, bags, and silt in or around the drain | The drain is clear but still slow — the line below is blocked |
| 2 | Strainer domes | Every drain has its dome, seated and intact | A dome is missing or the clamping ring is loose |
| 3 | Scuppers and overflow drains | Open, unobstructed, nothing stored in front of them | Water marks show they have been carrying the primary load |
| 4 | Gutters and downspouts | Clear, attached, discharging away from the building | Joints are separated or a downspout is crushed |
| 5 | Ponding | Water still standing 48 hours after rain stops | Always — persistent ponding is a drainage or structure question |
| 6 | Debris | Branches, fasteners, cans, leftover HVAC parts | Debris has cut or punctured the membrane |
| 7 | Membrane surface | Blisters, splits, open seam edges, bare spots — look, don't probe | You see anything on this list |
| 8 | Flashings | Wall and curb flashings tight to the wall, no gaps or pulled termination bars | Flashing has separated or sealant has failed |
| 9 | Penetrations | Pipe boots and pitch pans intact and full | A pitch pan has shrunk away from the pipe |
| 10 | Rooftop units | Panels on, screws not lying on the roof, condensate lines draining to a drain | A unit is leaking condensate onto the membrane |
| 11 | Trees | Limbs overhanging or touching the roof | Limbs need cutting — that is an arborist, not a roofer |
| 12 | The ceiling below | New stains on top-floor ceilings and walls | Any new stain — it is the cheapest leak survey you will get |
On ponding, the 48-hour test matters. NRCA treats water that remains more than 48 hours after rain, in conditions that allow drying as ponding, and that distinction is what manufacturers and consultants use. A puddle the morning after a storm is normal. The same puddle on day three is a problem worth writing down.
The value isn't in walking the roof once. It is in walking it the same way every time, so changes stand out.
Photograph the same spots from the same place. Pick ten fixed points — each drain, each corner of a big unit, the worst seam. Shoot them from the same position every visit. In a year you have a record that shows a seam opening slowly, which a single photo never will.
Mark the drains on a roof plan. A one-page sketch with every drain, scupper and hatch numbered turns "check the drains" into a list someone can finish. Tape a copy inside the roof hatch.
Keep a roof access log at the hatch. Who went up, when, and why. Most single-ply damage on occupied buildings comes from trade traffic — HVAC techs, cable installers, sign contractors — and the log is how you find out who dropped the screw that punctured your roof.
Make other trades report out. Put it in your service contracts: anyone working on the roof photographs the area before and after and reports damage they see. It costs nothing and catches problems while they are small.
Put walkway pads on the routes people actually use. The worn path from the hatch to the units is where membranes fail first. Pads are cheap and are the right fix — not a reason to keep walking on bare membrane.
Keep the paperwork. Many manufacturer warranties require documented maintenance, and a claim can be denied without it. Your checklist, dated photos and access log are that record. We wrote more on what warranty terms really cover when comparing bids.
These are the DIY moves that turn a small repair into a big one.
Your team's job ends at observation and housekeeping. Call a roofer when any item in the right-hand column of the table turns up, when a leak appears inside, or when the same problem shows up on two visits in a row. Recurring issues are the signal that a maintenance program — scheduled professional inspections with minor repairs included — costs less than reacting.
If you find active water coming in, that is leak repair, not a booking.
At least twice a year, spring and fall, and after any severe storm. Buildings with heavy tree cover around them benefit from an extra check in late November once the leaves are down.
Yes, if your employer follows OSHA's fall protection rules for low-slope roofs: protection within 6 feet of the edge, and either protection or a designated area and an enforced 15-foot work rule beyond that. Skylights must be covered or guarded. Confirm your policy with your safety officer.
The industry benchmark is 48 hours after rain stops, in conditions that allow drying. Water that is still there on the third day should be reported and looked at.
No — clearing debris is normal maintenance and is usually exactly what a warranty expects. What can cause problems is unauthorised repair work on the membrane itself. Read the maintenance section of your warranty.
If your team's checklist turns up something you want a second opinion on, book a free 30-minute consultation or call 202-798-7663. We will tell you whether it needs a roofer at all.
Header image: AI-generated illustration (Magnific).
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