A real roof inspection takes 45 minutes to a couple of hours and produces a written report with photographs, not a verbal “you need a new roof.” If someone spends ten minutes on your property and hands you a replacement quote, you did not get an inspection. You got a sales call.
This guide walks through exactly what a contractor should be checking, why each item matters, and how to read the report you get back.
What a Roof Inspection Is
A roof inspection is a documented condition assessment of the entire roofing system: the covering, the flashings, the penetrations, the edge, the drainage, the deck and the ventilation. The goal is to tell you three things.
- What condition the roof is in right now
- What is likely to fail next and roughly when
- What it would take to fix or extend it
A good report separates urgent items from monitoring items. Everything should be photographed, and every photo should be labeled with a location.
From the Ground
The inspection starts before anyone gets on a ladder. From the ground a roofer is looking at the roof planes for sagging or waviness that suggests deck or structural problems, at shingle lines for missing tabs and lifted courses, at ridges and hips, at the gutters for granule accumulation, at fascia and soffit for rot and staining, and at siding, downspouts and vents for hail dents.
Soft metal damage on the ground is one of the most reliable indicators of hail size and direction, which is why adjusters look for it too.
On the Roof
The field
The large open areas of the covering. On asphalt, that means granule loss, bruising, cracking, curling, blistering, exposed mat, and whether shingles are still sealed. A roofer will lift a tab or two by hand. On a low-slope membrane, it means seam condition, shrinkage, punctures, blisters, ponding stains and the condition of any surfacing.
Penetrations
Every pipe, vent, curb, skylight, chimney, antenna base and equipment support. Pipe boots are the most common single leak source on residential roofs. Rubber boots crack and split, usually well before the shingles are done.
Flashing
Valleys, step flashing at walls, counterflashing at chimneys, headwall and sidewall flashing, and any place two planes or materials meet. Most leaks are flashing leaks. Sealant smeared over a flashing joint is a repair someone made in a hurry, and it is a signal to look closer.
Edge and terminations
Drip edge at eaves and rakes, gutter apron, edge metal and coping on low-slope roofs, and termination bars at walls. Wind damage almost always starts at an edge.
Drainage
Gutters, downspouts and their discharge on a pitched roof. Drains, strainers, scuppers and overflow provisions on a low-slope roof. A blocked drain adds enormous weight and turns a roof into a pond.
From the Inside
The attic tells you what the roof will not. Inspecting from below shows:
- Active leaks and old staining on the decking
- Rot, delamination or sagging plywood between rafters
- Mold or mildew, which points to a ventilation problem as much as a leak
- Daylight through the deck or around penetrations
- Insulation that is compressed, displaced or wet
- Whether intake and exhaust ventilation are balanced, and whether bath and kitchen fans vent outside instead of into the attic
Skipping the attic is the most common shortcut in a bad inspection.
Low-Slope and Commercial Specifics
Commercial roofs get additional steps because the assembly is layered and the damage hides inside it.
- Core cuts. Small samples taken through the assembly to identify every layer, confirm insulation type and thickness, and check whether the insulation is wet.
- Moisture survey. Infrared, capacitance or nuclear scanning to map saturated areas. Water travels laterally under a membrane, so the wet area is rarely under the visible leak.
- Drain flow testing. Confirming the roof drains and how long standing water takes to clear.
- Equipment curbs and walkways. Damage from foot traffic and service technicians is a leading cause of membrane punctures.
- Fastener and attachment check. Especially after a wind event.
Our commercial roofing team performs these as part of any condition assessment on a low-slope building.
What Gets Checked and Why
| Inspection item | Why it matters |
|---|---|
| Shingle seal and granule loss | Determines remaining service life |
| Pipe boots and vent flashing | Most common residential leak source |
| Valley and wall flashing | Most common leak source overall |
| Drip edge and edge metal | Where wind damage starts |
| Attic decking and staining | Reveals leaks the surface hides |
| Ventilation balance | Drives shingle life and moisture problems |
| Gutters and downspouts | Backed-up water damages fascia and foundation |
| Membrane seams and terminations | Where low-slope roofs fail first |
| Insulation moisture content | Decides restoration versus replacement |
| Drains and scuppers | Standing water is a structural load issue |
How Often You Should Inspect
- Twice a year for commercial and low-slope roofs, and after any significant storm. Most manufacturer system warranties require documented inspections to stay in force.
- Once a year for residential roofs, plus after hail or high wind.
- Before buying a property, always, and separately from the general home inspection. A home inspector looks at a roof. A roofer inspects it.
- Before a warranty period ends, so anything covered gets caught while it is still covered.
How to Read the Report
A trustworthy inspection report shows you evidence and lets you draw the conclusion. Watch for these signs that it is not one:
- No photographs, or photographs with no location labels
- No mention of the attic or the underside of the deck
- Damage described in general terms with no count, measurement or location
- A replacement recommendation with no explanation of why repair is not viable
- Pressure to sign the same day, or an offer to cover your insurance deductible, which is illegal in North Carolina
- No written scope, only a price
If you are unsure about a report, get a second inspection. A contractor confident in their findings will not mind.
Frequently Asked Questions
How much does a roof inspection cost?
Many roofing contractors, including Red Letter Roofing, provide an evaluation at no charge. Specialized services such as infrared moisture surveys and core cuts on commercial roofs are usually a separate line item, and they are worth it before any large decision.
How long does a roof inspection take?
A residential inspection typically runs 45 minutes to 90 minutes including the attic. A commercial low-slope assessment with core cuts and a moisture survey takes longer and scales with square footage.
Do I need an inspection if I do not see a leak?
Yes. By the time water shows on a ceiling it has usually been in the assembly for a while, and the repair is bigger than it would have been. Inspections catch flashing and boot failures while they are still small repairs.
Can a roof be inspected after a storm even if it looks fine?
It should be. Hail damage in particular is close to invisible from the ground, and insurance carriers have filing deadlines. Our storm damage restoration team documents to the standard adjusters expect.
Schedule Your Roof Inspection
Knowing the actual condition of your roof turns a guess into a plan. Red Letter Roofing inspects the full system, photographs what we find, and gives you a written assessment you can act on now or file for later.
Call (919) 977-5318, or learn more about roof repair, residential roofing and commercial roofing.