6 Warning Signs Your Commercial Roof Needs Attention
A tenant reports a drip. Someone else notices water spilling over a roof edge. These observations are useful clues, but they do not tell you the full repair scope.
Here are six signs worth reporting, what your team can observe safely and what a roofer checks to find the cause.
Why the Source Matters
Water can travel beneath roofing before it appears indoors. A stain helps locate the symptom; checking the surrounding roof, flashing and drainage helps identify the cause.
1. Standing Water and Drainage Problems
What you can see: water pouring over the roof edge in the wrong places, overflowing downspouts, or leaks that return after every rain.
What a roofer checks: water that sits long after a storm, new low spots and blocked drains.
Recurring standing water deserves attention, especially if it is new or accompanies a leak. A roofer should check drainage and the roof manufacturer's requirements before recommending cleaning, localized repairs or changes to the drainage system.
2. Open or Lifting Seams
On TPO and PVC roofs, the sheets are heat-welded together. On EPDM, seams are joined with tape or adhesive. Over time, seams can open, lift or wrinkle.
What a roofer checks: the condition and integrity of the seams using methods appropriate to that membrane. A seam can need attention even when it looks intact from a distance.
3. Punctures, Cuts and Blisters
Membranes get damaged in everyday ways: a dropped tool, a sharp screw from an HVAC panel, hail or windblown debris. Blisters are raised bubbles that can form when air or moisture gets trapped.
What you can do: record rooftop service visits and ask vendors to use designated walkways and remove loose tools, screws and debris. Do not cut or puncture a blister to investigate it.
4. Flashing Trouble at Rooftop Units and Walls
Flashing seals transitions at walls, roof edges, pipes, skylights and equipment supports. The materials and repair methods depend on the roofing system.
What you can see: rust stains running down a wall, or loose metal at the roof edge.
What a roofer checks: flashing pulling away, cracked sealant, bent curb caps, and new units added after the roof went on.
5. Loose Edges and Deteriorating Repairs
Loose edge metal, pulled fasteners, gaps and failing older patches deserve a closer look. Materials that were used for a previous repair may also be incompatible with the surrounding roof.
What you can see: loose or displaced metal, fallen roofing pieces or a leak returning near an old repair. A roofer checks the attachment, underlying condition and materials needed for a lasting repair.
6. Interior Stains and Tenant Complaints
Inside the building, watch for:
Stained or sagging ceiling tiles
A musty smell on the top floor
Peeling paint or bubbling drywall near outside walls
Rust on exposed steel deck
Buckets in the same spot after every storm
Water can travel a long way under a membrane, so the stain isn't always below the leak. Keep a simple log of complaints with dates, locations and weather. It helps a roofer find the source much faster.
Repair, Maintain or Replace?
A leak doesn't automatically mean you need a new roof. Targeted repairs and regular maintenance can help keep a sound roof working. We check its condition before recommending the next step.
Depending on what the inspection finds, your options may include:
Targeted repairs to seams, punctures and flashing
Scheduled maintenance, like clearing drains and resealing flashing
A compatible restoration or coating system when inspection confirms the roof qualifies, with necessary repairs and preparation completed first
A recover when the existing assembly, core-sample findings, moisture condition, structural requirements, applicable codes and manufacturer specifications allow it
A tear-off and replacement, when wet insulation or deck damage is widespread
Have your roof inspected at least annually. Larger or older roofs may benefit from biannual visits in spring and fall, with additional checks after significant storms or new concerns. Our flat roof maintenance checklist shows what to track each season.
What a Free Commercial Inspection From Us Includes
We document what we find with photos, video and a complete breakdown, then give you a realistic plan. If repairs and maintenance will keep your roof performing, we'll tell you. If replacement is the smarter move, we'll show you why.
We work on TPO, PVC, EPDM, modified bitumen, built-up roofing, metal, shingles and coated roofs. Your inspection report explains immediate priorities and options for repairs, maintenance, restoration, recover or replacement. Recommended work is quoted separately.
Frequently Asked Questions
What should we do as soon as a tenant reports a leak?
Keep people away from sagging ceilings and water near electrical equipment. If it is safe, protect belongings and document the location, timing and weather. Contact a roofer promptly; an immediate electrical or structural hazard needs the appropriate emergency response.
Will a repair affect our roof's manufacturer warranty?
It can. Many membrane warranties have rules about who can make repairs. Share your warranty documents with your roofer before any work so those rules can be followed.
Do you inspect commercial roofs outside Spokane?
Yes. We serve Spokane and nearby towns, plus Post Falls and North Idaho.
Learn more about our Commercial Roof Repair service.
Is Your Building Showing One of These Signs?
Schedule a free commercial roof inspection. You'll get photos, video, a complete breakdown and a realistic plan, with no pressure to replace a roof that still has life in it.
Or call (509) 842-6611.
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