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“Roof inspection” means very different things depending on who's holding the ladder. Some outfits call a two-minute look from the driveway an inspection, snap one photo, and hand you a quote for a full replacement. That's not an inspection — it's a sales pitch with a clipboard. A real inspection is a methodical top-to-bottom look at every part of the system that keeps water out of your house, and it ends with you knowing exactly what shape your roof is in.
We've walked plenty of Billings-area roofs, and the same crew has worked together for a decade. Here's exactly what we look at when we inspect a roof, what we document, and what you should expect to walk away with. If a contractor skips these steps, you didn't get an inspection.
The short answer
Bottom Line Up Front
A real roof inspection covers four zones — the exterior surface, every flashing and penetration, the attic and decking from underneath, and the gutters and drainage. It ends with photos, a written summary, and an honest recommendation. And at Yellowstone Roofing, it's free.
A thorough inspection isn't about finding a reason to sell you a roof. It's about telling you where you actually stand — whether that's “you're good for another few years,” “here's a $400 repair,” or “this one's near the end.” The honest answer is often the smaller invoice, and a good inspector will tell you that.
covers, top to bottom
assessment costs you
together — we know what we see
The rest of this post walks each of the four zones, what we photograph, and what a genuine inspection report looks like when it lands in your inbox.
1. The exterior walk
Everything starts on the surface. We get up on the roof — not just look at it from the ground — and walk every accessible slope. We're reading the shingles first: are they lying flat, or are corners curling and cupping? Are the courses straight, or has wind lifted and re-set them crooked? We check for granule loss — the sandpapery coating that protects asphalt from Montana's high-elevation UV — because bald, shiny spots mean the shingle mat is exposed and wearing out.
On metal and standing-seam roofs, the exterior read is different but just as important: we check seams, fasteners, and any spots where snow load or valley wind has worked a panel loose. Either way, we photograph what we find as we go, so nothing gets described from memory later.
What we check at a glance
This is the checklist we work through on every inspection, organized by the four zones. If a “free inspection” you got somewhere else skipped the whole right-hand set of items, you got a sales visit, not an inspection.
| Zone | What we look at | What it tells us |
|---|---|---|
| Shingles / panels | Curling, cracking, granule loss, lifted courses | How much service life is left |
| Flashing | Chimney, walls, valleys, step flashing | Where leaks usually start |
| Penetrations | Vent boots, pipe collars, skylights | Cracked seals = active leak risk |
| Attic | Daylight, staining, damp insulation | Hidden leaks and ventilation issues |
| Decking | Soft spots, sag, rot from below | Whether it's safe to patch at all |
| Gutters | Granule piles, sagging, drainage flow | Roof wear + water routed away from foundation |
| Documentation | Photos of every finding | You see what we see — no guesswork |
This is the standard inspection scope for residential roofs around Billings, Laurel, and the surrounding valleys. Commercial and low-slope systems add a few flat-roof-specific checks — ponding, seam welds, membrane condition.
You can do a rough self-check before you ever call anyone: look in your gutters and splash blocks. A little sandy grit is normal. Piles of dark granules mean the roof is actively shedding its UV protection — and that's worth having a professional take a closer look, sooner rather than later.
2. Flashing & penetrations
Most roofs don't fail across the middle of a slope — they fail where the roof meets something else. Chimneys, walls, valleys, vent pipes, skylights: anywhere the shingle plane is interrupted, there's flashing or a seal doing the work of keeping water out, and that's where leaks almost always start. We check every one of them.
Rubber vent boots are a classic Montana failure point — the freeze-thaw cycle dries them out and cracks the collar, and a cracked collar leaks straight down into the ceiling below. We flex each one and check the seal. If we find one bad boot on a healthy roof, that's a quick, cheap fix. If we find cracked boots on three penetrations plus flashing lifting at the chimney, that's a different conversation, and we'll show you the photos that got us there.
3. The attic & decking
Here's the step the driveway inspectors skip entirely, because it's the one you can't do from the ground: we go inside and look at the roof from underneath. The attic tells you things the surface never will. Daylight coming through the deck means a hole. Dark staining on the sheathing means water has been getting in — maybe for a while. Damp or matted insulation, a musty smell, or frost on the underside of the deck in winter all point to ventilation and moisture problems that show up as bigger issues down the road.
We also read the decking — the plywood or board sheathing the shingles are nailed to. Soft spots, sag, or rot mean the deck itself is compromised, and you can't reliably patch shingles onto a bad deck. This is the check that changes the answer more than any other: a roof that looks fine from the top but has soft decking underneath is not a repair candidate. Finding that before you spend money on a patch that won't hold is the whole point of looking.
After a hailstorm rolls through, out-of-state door-knocking crews will run a “free inspection” that somehow finds total-replacement damage before they've even looked in the attic — and pushes you to sign before the insurance adjuster has seen anything. A genuine inspection takes time, covers all four zones, and gives you photos to back up every finding. If someone's rushing you to sign, that's the tell. Get a second opinion from a local contractor with its own employee crews — one who'll quote you the repair if a repair is what it needs, and who'll still be in town when the warranty matters.
4. Gutters & drainage
Gutters aren't strictly part of the roof, but they're part of the water-management system, and a roof inspection that ignores them isn't complete. We check that gutters are securely attached and pitched to drain, that downspouts are routing water away from the foundation, and — as mentioned — what's actually sitting in the trough. Piles of granules in the gutters are one of the clearest at-a-glance signs of an aging asphalt roof.
Blocked or sagging gutters cause their own damage: overflow that rots fascia, ice dams that back water up under the shingles, and pooling that undermines the foundation. If we spot gutter problems during the inspection, we'll flag them — sometimes the roof is fine and the real issue is drainage.
What you get afterward
An inspection isn't finished until you have something in your hands. When we wrap up, you get the photos we took as we went — the good and the bad — a plain-language summary of what we found in each zone, and an honest recommendation: no action needed, a specific repair, or a replacement. If it's a repair, we tell you what it'll run. If it's a replacement, we walk you through your shingle and metal options and lay out the numbers.
“This is old school attention to detail and work ethic using contemporary skills and techniques.” — Tom C., Yellowstone Roofing customer
And when there's a storm-damage claim involved, that documentation matters even more. We photograph everything and write estimates adjusters can actually work with, so a covered replacement doesn't turn into a fight. If you think you've got wind or hail damage, this is exactly the kind of situation a proper inspection is built for — and it feeds straight into a roof repair when that's the right call.
What a roof inspection should cost
Here's a fair question a lot of homeowners are afraid to ask: what does this cost me? For a Yellowstone Roofing assessment, nothing. Our estimates and inspections are free — no obligation, no pressure. We'd rather earn the work by being straight with you than charge you for the privilege of a sales visit.
The free assessment
What's included, no charge- Full exterior roof walk included
- Flashing & penetration check included
- Attic & decking look included
- Gutter & drainage review included
- Photos + written summary included
If a repair's needed
Typical single-issue fixes- Vent boot / pipe collar $150–$350
- Step / chimney flashing $350–$700
- Section of shingles $300–$900
- Cleanup + magnet sweep included
The bottom line
A real roof inspection covers the whole system: the surface, the flashing and every penetration, the attic and decking from underneath, and the gutters and drainage that route water away. It ends with photos, a written summary, and a straight recommendation — not a pre-written replacement quote. If any of those steps got skipped, you didn't get an inspection.
If you're not sure what shape your roof is in — or a storm just rolled through and you want a professional read before it gets worse — that's exactly what a free assessment is for. We'll walk the roof, check the attic, show you the photos, and tell you honestly where you stand, even when the honest answer is “you're fine, call us in a few years.”