What a commercial roof inspection covers
A commercial roof inspection documents the membrane, seams, flashing, penetrations, drainage, and deck condition with photographs and core cuts where saturation is suspected. It produces a condition report with a system recommendation and dated photographs for insurance or warranty claims. Inspections are recommended twice a year and after any hail event per NRCA guidance, 2024.
- Twice yearly + post-storm
- When saturation suspected
- Condition report + photos
- 48-hour ponding rule
- ANSI/SPRI ES-1
- Claim, warranty, capital
How often to inspect
The NRCA recommends a commercial roof inspection twice a year and after any severe weather event, per NRCA guidance, 2024. Spring and fall timing works on the South Plains: spring catches winter damage before storm season, and fall clears drainage before ice. After hail, the clock is shorter, and a post-storm inspection should happen before the next rain, because the photographs are what an adjuster acts on.
A roof under a manufacturer warranty has its own cadence. Some system and NDL warranties require documented inspections to stay in force, so the inspection report doubles as a warranty compliance record. Skipping the required cadence can void coverage the owner paid for, which is more expensive than the inspection.
The inspection checklist
Every inspection covers the same set of points so the report is comparable across buildings and across years.
We walk every roof section and document a consistent checklist. The membrane gets probed for fractures, blisters, and alligatoring. Seams are tested, because seam failure is the most common single-ply leak source. Flashing at every penetration, curb, and edge metal is checked for pull, gap, and sealant condition.
Drainage is judged against the 48-hour ponding rule, per NRCA and the IBC, 2021. Drains and scuppers are cleared and checked for strainer damage. Edge metal is verified to ANSI/SPRI ES-1 for wind uplift, because the perimeter and corners carry the highest wind load per ASCE 7-22. Walk pads and HVAC curbs are inspected for traffic damage.
- Membrane surface: fractures, blisters, alligatoring
- Seams: probe-tested for weld and adhesion
- Flashing: penetrations, curbs, edge metal, sealant
- Drainage: 48-hour ponding rule, drains and scuppers
- Edge metal: wind uplift per ANSI/SPRI ES-1
- Walk pads and curbs: traffic and mechanical damage
- Deck: from below for fastener back-out, water staining
Core cuts and moisture testing
Where a visual walk or a moisture reading suggests wet insulation, a core cut is taken. A core cut is a small sample removed through the membrane and insulation down to the deck, the only way to confirm saturation. It is patched to manufacturer detail after sampling. Core cuts are the test that decides a coating restoration from a full tear-off, because coating a saturated roof traps the water and accelerates failure.
On large roofs, an infrared moisture scan maps wet insulation under a dry surface before any cut is taken, so cuts are placed where they answer the question. Drone surveys help on large or hard-to-walk roofs and after hail, where wide-area surface and dent mapping matters. The right inspection is the one that matches the question the owner is asking.
What the report gives you
The deliverable is a condition report with dated photographs of every finding, overview shots of each roof section, a summary of conditions, and a system recommendation tied to a budget range. For a storm, the report is the evidence an insurance adjuster works from. For a warranty, it is the document a manufacturer representative needs. For a capital plan, it is the number that lets a facility manager budget a restoration or replacement before a leak forces it.
A good report also lists the exclusions and voids on the relevant warranty, because what voids a material warranty and a system warranty differs, and an owner should know before a contractor climbs on the roof. That transparency is where the inspection pays for itself, by preventing a small repair from voiding a warranty worth tens of thousands of dollars.
Types of commercial roof inspection
| Type | What it finds | When to use it |
|---|---|---|
| Visual walk-through | Surface damage, ponding, flashing gaps | Twice-yearly baseline |
| Drone survey | Wide-area surface and hail mapping | Large roofs, hard-to-walk roofs |
| Infrared moisture scan | Wet insulation under a dry surface | Suspected saturation |
| Core cut | Confirmed deck and insulation condition | Decides restore vs replace |
| Full warranty pre-inspection | Full assembly and installation detail | Manufacturer registration |
A complete condition report often combines a visual walk-through with a core cut and, where indicated, an infrared scan. Scope is matched to the roof and the question being asked.
Common questions
How often should a commercial roof be inspected?
Twice a year and after any hail event, per the NRCA, 2024. Spring and fall timing catches drainage before storm season and winter damage before a hard freeze. A post-storm inspection documents hail and wind damage with dated photographs for an insurance or warranty claim.
What is included in a commercial roof inspection?
The membrane surface, every seam, flashing at penetrations and curbs, drains and scuppers, ponding areas, edge metal per ANSI/SPRI ES-1, walk pad condition, and the deck beneath. Where saturation is suspected, a core cut is taken. The deliverable is a condition report with photographs, findings, and a system recommendation.
What is a core cut and when is it needed?
A core cut is a small sample removed through the membrane and insulation to inspect the deck and the insulation for moisture. It is the only way to confirm saturation and to decide restoration from replacement. We patch the cut to manufacturer detail after sampling. A core cut is taken wherever a moisture reading or ponding suggests wet insulation.
Do I get photographs with the inspection?
Yes. Dated photographs of every finding, plus overview shots of each roof section, are filed with the report. Photographs are what an adjuster and a manufacturer warranty representative act on after a storm or a leak claim, and they are the evidence that a coating restoration is appropriate versus a tear-off.
Can I do a roof inspection myself?
A building owner can and should walk for drainage and obvious damage after a storm. A professional inspection adds seam probing, moisture detection, core cuts where indicated, edge metal verification to ES-1, and a documented report tied to a system recommendation and warranty. The professional report is what supports a claim or a capital request.
How much does a commercial roof inspection cost?
A visual inspection with a condition report is modest and often credited toward a resulting repair or restoration. Infrared moisture scans and core cuts add scope and cost. A full warranty pre-inspection through a manufacturer is the most detailed and is priced to the scope. We quote the scope before we climb on the roof.
Related steps from this guide
Get a condition report before you commit to a system.
Photographs, documented findings, and a written recommendation. Certificate of insurance available before contract.
Written and reviewed by Zac Ammons, Core Commercial Roofing & Coatings.
Commercial roofing field experience across West Texas. Content is reviewed against current NRCA guidance and manufacturer technical data.