What Happens During a Roof Inspection?

Most homeowners have never watched a roof inspection actually happen. That makes it easy for a bad one to hide — ten minutes, a glance from a ladder, a verbal “yeah, you’ve got some damage.” Here’s what a real inspection looks like, top to bottom, and how to judge whether the one you’re getting is worth anything.

Ours produces a forty-photo packet: every slope, every penetration, every finding photographed and labeled, with written findings in your inbox within 24 hours. That’s the standard the rest of this post describes.

On the roof: what gets photographed and why

Every slope, individually

Damage is directional. Hail and wind hit some slopes and spare others, so each slope gets its own overview shot plus close-ups of anything notable. This matters enormously on insurance claims — an adjuster scopes by slope, and slope-labeled photos are what let your documentation line up with their paperwork. See our Woodlands storm damage page for how that packet feeds a claim.

Valleys, penetrations, and flashing

Valleys carry the most water on the roof, so they fail first and get inspected hardest. Then every penetration: pipe boots (the neoprene collars around plumbing vents are one of the most common causes of roof leaks — we wrote a whole post on them), furnace and vent stacks, satellite mounts, and the flashing at chimneys, walls, and skylights. A surprising share of “my roof is leaking” calls trace to a $10 rubber collar or a lifted piece of step flashing, not the shingles at all.

Shingle condition: granules, seals, nail pops

• Granule loss. Granules aren’t cosmetic — they’re the shingle’s UV shield. IBHS’s peer-reviewed research (Frontiers in Materials, 2025) shows that once granules are displaced, the exposed asphalt embrittles; their testing found repeated sub-severe hail (0.7–1.0”) plus two years of weathering left shingles performing like decade-old material. We look for granule accumulation in gutters and bare or shiny spots on the mat.
• Seal integrity. IBHS’s wind research identifies seal strength as the key factor in wind performance, and it declines as shingles age. We check for unsealed tabs by hand along edges and ridges.
• Wind evidence. Per IIBEC, uplift that creases or tears a shingle is wind damage — a crease line across a tab is the signature we photograph.
• Hail evidence. Bruised mats, displaced granules with a fresh impact pattern, and matching strikes on soft metals (vents, flashing, gutters) that date the event.
• Nail pops and mechanical issues. Backed-out fasteners telegraph through shingles and open small entry points; they’re cheap to fix now and expensive to ignore.

In the attic: the half most inspections skip

A roof inspection that never opens the attic hatch is half an inspection. From below we check:

• Daylight and water staining at penetrations and along the decking — active leaks show here before ceilings do.
• Decking condition — soft spots, delamination, and the musty smell of a moisture problem.
• Ventilation. The Asphalt Roofing Manufacturers Association notes a poorly vented attic can hit 140°F on a 90°F day, and that heat-plus- moisture combination deteriorates decking and shingles from underneath. The benchmark is the 1-in-300 rule: one square foot of net free ventilation area per 300 square feet of attic (the code base ratio is 1/150), split between high exhaust and soffit intake, with intake at least equal to exhaust (per the Asphalt Roofing Manufacturers Association). A roof that “aged fast” often turns out to have been cooking from below.

Then: everything in writing, fast

The deliverable is the point. You get the forty-photo packet and written findings within 24 hours — what’s damaged, what’s aging, what’s fine, what we’d repair versus replace, and a written price. If the finding is “your roof is healthy, see you in two years,” that’s what the report says. A documented “no damage” has real value too: it’s your baseline for the next storm claim.

What inspections cost (and why ours is free)

For market context, according to Angi (2026) a professional roof inspection runs $250 on average nationally, with a range of $75 to $1,100 — physical inspections typically $75–$200, drone inspections $150–$600, and infrared $400–$600. Angi also notes some contractors offer free inspections (Angi, roof inspection cost).

Northvale is one of them. The honest reason: an inspection is how we earn the work when work is warranted, and the forty-photo packet is how we prove it. You’re free to take our written findings and do nothing, or get other bids with them. Details on the Woodlands roof inspection page.

When to get one

• After a storm. Hail and wind damage is often invisible from the ground. If a storm just hit, start with our storm-damage checklist, then get the documented inspection before you decide whether to file.
• Buying a home. A general home inspection covers the roof briefly; a roof-specific inspection tells you what the next decade costs. Agents: a 24-hour written report with photos is built for an option period — it either clears the roof or gives your buyer a concrete repair credit number.
• Selling a home. A clean pre-listing roof report removes the single scariest unknown from a buyer’s inspection response.
• Every couple of years, and as the roof ages. Small findings — a split pipe boot, a few unsealed tabs, a clogged ridge vent — are repair-priced problems that become replacement-priced problems when they run for years. Our roof repair page covers that end of the spectrum.

The ten-minute test

If an inspector is on and off your roof in ten minutes with no photos, no attic check, and no written report — you didn’t get an inspection, you got a sales call. Ask any roofer three questions first: How many photos will I get? Do you check the attic? Is the report written?

Ours: forty, always, and yes — within 24 hours. Book a free inspection and see the difference on paper.