A commercial roof inspection is a documented survey of a roof’s condition, delivered as a written report with photographs, urgency ratings and an estimate of how much service life is left. Every inspection is scoped and priced in writing before the visit, so you know exactly what you are buying and what you will receive.
Owners book an inspection for one of four reasons: a leak nobody can explain, a budget that has to be defended, a sale or refinance that needs a condition report, or a warranty that requires proof of regular inspection. The right inspection is rarely the cheapest one. It is the one scoped for the decision you are about to make.
Inspection types
| Inspection | Best for | What it includes |
|---|---|---|
| Condition inspection | Routine checks, budgeting, warranty requirements | Full visual inspection, photo report, urgency ratings |
| Condition with moisture survey | Repair or replace decisions | Everything above plus infrared or meter survey and core samples |
| Storm damage inspection | After hail or high wind | Damage documentation suitable for an insurance claim |
| Pre purchase inspection | Buyers and lenders | Condition, remaining life and capital cost range |
| Annual program | Portfolios and property managers | Scheduled inspections across every roof you manage |
The difference between the first two rows is the one that matters most. A condition inspection tells you what the surface of the roof is doing. A moisture survey tells you what the inside of the roof is doing, and the inside is where replacement cost is decided. If your question is whether to repair or replace, the visual inspection alone cannot answer it.
Storm damage inspections are scoped differently again. The goal is not only to record the condition but to document the cause, the date and the pattern of damage in a form an adjuster can work with. That means wide shots for context, close shots with a scale, and a written description of the mechanism rather than a list of defects.
What the inspector actually does
- Reviews the record first. Roof age, system type, warranty documents, previous reports and a history of leaks all narrow the search before anyone climbs a ladder.
- Walks the field in a pattern. A methodical grid rather than a wander, so no section is missed and every photograph can be placed on a plan later.
- Assesses every detail individually. Drains, curbs, pipe boots, walls, parapets, expansion joints, skylights and equipment supports. Most leaks start where the membrane is cut or turned up, not in the open field.
- Probes seams and flashings. A visual check confirms little on its own. Seams are tested by hand for adhesion and flashings checked for pull away, shrinkage and open laps.
- Checks drainage. Drain condition, clamping ring, strainer, ponding evidence and slope toward the outlet. Standing water shortens the life of nearly every membrane.
- Looks underneath where possible. Deck condition, staining, corrosion and previous repairs are visible from inside the building and invisible from the roof.
- Tests when the scope calls for it. Infrared, moisture meter readings and core samples, each recorded by location.
- Photographs and locates everything. A defect without a location on a plan is a defect nobody can find again.
What an inspection does not do
An inspection is not a repair, and it is not a bid. The report describes condition and recommends work, but the person writing it is not the person selling you the work, which is the point. That separation is what makes the report usable by a lender, an insurer or a buyer.
It is also not a structural survey. If the roof shows deflection, sagging between joists or ponding that suggests the deck is moving, the report will say so and recommend a structural engineer. A roof inspector can tell you the deck looks wrong. Only an engineer can tell you what it will carry.
Finally, a visual inspection cannot see through the membrane. That is the entire reason moisture testing exists as a separate scope, and it is why a quote for a repair or replace decision based on a walk alone is a guess with a price on it.
How booking works
- Tell us the address, building type and roof size on the contact form.
- We confirm the scope and price in writing before anything is booked.
- An inspector visits at an agreed time, with safe access arranged.
- You receive the written report.
Access is the step that causes most delays. Before the visit, confirm who holds the hatch key, whether a lift is needed, whether the route runs through a tenant space, and whether any rooftop equipment has to be isolated. Sorting that out at booking is the difference between a visit that happens and a visit that gets rescheduled.
What the report contains
- Photographs of every defect, each located on a roof plan
- An urgency rating on each finding, so you can separate today from next year
- Moisture results by location where testing is in scope
- A remaining life estimate with the reasons behind it
- Recommended work, sequenced and grouped so it can be priced
- Drainage, warranty and access notes
The urgency rating is the part owners use most. It turns a list of problems into a sequence of decisions: what has to be fixed before the next storm, what belongs in this year’s budget, and what can be watched. A report that grades nothing leaves you to guess.
When to book
- Before the budget cycle, not after it. A report that lands the week after the capital plan is signed off is a report you cannot act on for a year.
- Before a sale or refinance. Buyers and lenders order their own surveys, and a seller who already knows what is on the roof controls the conversation instead of reacting to it.
- Within days of a storm, while the damage pattern is fresh and before repairs muddy the evidence.
- Before a warranty anniversary, where the warranty sets an inspection requirement.
- After any trade has worked on the roof. HVAC, telecoms and kitchen contractors cause a large share of the punctures we photograph.
Seasonal timing matters too. Infrared scans need a clear evening with a decent temperature swing, so a scan booked in the wrong weather gets postponed. Tell us if you are working to a deadline and we will build the schedule backwards from it.
Why an independent report matters
A report written by someone who is not trying to sell you a roof carries more weight with buyers, lenders and insurers. It also gives you a fixed scope: hand the same document to three contractors and you receive three bids for the same work, which is the only way to compare prices honestly.
The opposite approach, taking a free inspection from a contractor who wants the replacement, produces a document that is really a sales proposal. It may be perfectly accurate. You simply cannot tell, and neither can anyone you show it to.
Choosing the right scope
- Budgeting or warranty compliance: a condition inspection, repeated annually or twice a year.
- Repair or replace decision: condition with moisture survey. Do not decide without it.
- Buying or lending: pre purchase inspection with core samples, layer count and a capital cost range.
- After hail or wind: a storm damage inspection, booked quickly while the evidence is fresh.
- Several buildings: an annual program, so every roof is reported in one format and can be compared.
See the building types we inspect and what we focus on for each, check where we work on the locations page, or read how pricing is set before you ask for a quote.
Common questions
How long does a commercial roof inspection take?
Most single roof inspections take two to four hours on site, and a large or multi section roof can take a full day. The written report follows separately.
- Area matters less than people expect: an open warehouse field is quick to walk
- Detail count drives the time, since every curb, drain and pipe is assessed
- Testing adds passes: infrared waits for thermal conditions, cores add cutting and patching
- Photographs have to be sorted, located on a roof plan and written up
Ask for the on site time and the report turnaround as two separate numbers when you approve the scope. A contractor who quotes both is planning the job rather than guessing at it.
How often should a commercial roof be inspected?
Twice a year is the working standard, once in spring and once in fall, plus an extra visit after any severe weather event.
- Spring finds winter damage: split seams, cracked sealant, displaced flashing, blocked drains
- Fall clears drains and closes small openings before the weather exploits them
- Heavy rooftop traffic from kitchen, telecoms or HVAC trades justifies more visits
- So do roofs late in their life, or those over stock and sensitive contents
Roofs under a manufacturer warranty often carry a written inspection requirement, and missing it can quietly end the cover long before anyone files a claim. Ask us about an annual program if you manage several buildings.
What is the difference between an infrared scan and a core sample?
An infrared scan finds where water is hiding across the whole roof. A core sample proves what is actually there in one spot.
- Wet insulation holds heat, so damp areas glow against the cool field after sunset
- Scanning is fast, covers the whole roof and damages nothing
- It cannot give you layer count, deck material or the cause of a reading
- A core records the layers, checks the insulation and deck, then is repaired properly
Cores are destructive and slow, so they are taken at a small number of locations chosen from the scan. A scan without cores is a map with no key. Cores without a scan are a handful of guesses, so most roofs want both in the scope.
Do I need to be on site during the inspection?
No. Most inspections are carried out without the owner present, provided roof access is arranged in advance and somebody can open the hatch or gate.
- We need a contact who can authorize access and confirm which sections are yours
- That contact should flag tenant restrictions and live equipment to stay clear of
- Joining the first visit is the fastest way to understand what you own
- Presence is not a substitute for documentation
The report is the deliverable and it has to stand on its own for a lender, an insurer, a board or a buyer who was not there. If you cannot attend, ask for a short call once it lands so the urgent findings are walked through.
Does an inspection keep my manufacturer warranty valid?
It can, but only if the inspection meets what the warranty document actually requires. The right inspection protects cover and the wrong one does nothing.
- Many warranties oblige the owner to inspect, maintain and keep records
- Some name who is allowed to work on the roof at all
- Many require the manufacturer to be told about a leak within a set period
- A leak repaired quietly by a local contractor can void cover even if sound
Find out who holds the warranty, what it covers and how long it runs, then keep the file: dated reports with photographs, a record of what was repaired and by whom, and any manufacturer correspondence. Owners lose cover because nobody kept the record.