Roof Installation Inspection: Before and After Checks

You do a staged inspection plan before and after the install.

You rely on a written scope and time-stamped photos of hidden layers. Is that enough to trust the result?

In coastal North Carolina, the hard truth is you can’t “verify later” once shingles cover the leak-stoppers and wind locks. If you want proof without climbing on the roof or peeling up shingles, set expectations before the job starts. Capture documentation while the roof is open, then finish with a ground and attic review confirming workmanship, paperwork, and accountability when the first big storm hits.

Before You Sign: Proof, Permit, Plan

A neighbor signs a “standard” roofing contract on Tuesday and realizes on Thursday that nobody can say which code version the permit used, or whether the shingle wind coverage even applies to the way it was nailed. By the time the first photo arrives, the only leverage left is a phone call.

Before you sign, ask for the items that determine whether you’ll be able to verify the “hidden layers” later, the way an HOA architectural review forces you to get the paperwork right upfront in a pre roof replacement inspection (and in North Carolina, drip edge is a code item you can tie to the permitted code path—see NC OSFM/DOI guidance summarizing 2018 NC Residential Code R905.2.8.5 on drip edge). Get the permit plan in writing (and which NC Residential Code version the job will be permitted under), the shingle product data sheet showing wind classification, and the manufacturer-required fastening pattern for your wind exposure (often six nails, but only if they’re in the right nailing zone).

Also confirm who will run the job: the on-site foreman and when they’ll send in-progress photos (decking and underlayment) before those details disappear. Don’t rely on a municipal inspection to catch craftsmanship. In my experience, it almost never does.

A roofing permit and written scope are only as good as the contractor’s licensing and insurance behind them. Read more in our article: Verify Roofer License Nc

Tear-off day: deck and moisture checks

You blink and the underlayment is down over a soft spot that never got replaced, and now every future ceiling stain becomes an argument about what was “already there.” Tear-off day is your one clean window to prevent that fight.

On tear-off day, you get your best chance to confirm the decking and moisture conditions before the system gets covered again. If the crew covers questionable decking, you’ll still get “a new roof,” but that’s a red flag for a future leak or shingle blow-off in the first nor’easter. Case in point: stained sheathing around a bathroom fan or chimney can look like “old marks,” but if the wood feels soft or delaminated, it’s a replace-now item, not a patch-later debate.

Before they install underlayment, ask the foreman to send clear, timestamped photos (wide shots plus a few close-ups) and get your sign-off on:

• Deck condition: any rot, delamination, cracked plywood/OSB edges, or spongy areas, plus the exact sheet locations they plan to replace.

• Moisture clues: wet insulation, active drips, moldy sheathing, or dark staining around penetrations and valleys.

• Deck attachment (wind matters here): a quick check that the sheathing is properly fastened to rafters/trusses (ask what fastening pattern they’re confirming in your wind exposure).

• Ventilation red flags: disconnected bath fans dumping into the attic, blocked soffits, or crushed ridge vent areas.

• Baseline documentation: a full roof-deck photo set so you can tie later “we fixed it” claims to what was actually exposed.

In-Progress Photo Checklist for the “Hidden Layers”

If you get the right photos at the right moments, you can validate the parts of the roof system that stop water and resist wind without climbing a ladder or taking anyone’s word for it. Done well, your job folder becomes proof instead of a pile of invoices.

Even a sharp-looking finish can still conceal the errors that lead to leaks or wind damage later. If you can’t safely inspect the work yourself, ask for a short, specific set of time-stamped photos so the workmanship is verifiable. Once the roof is closed, everything else becomes speculation. Tell the foreman you’re not asking to micromanage. You want documentation in a home inspection report format of the layers that will be covered within hours.

Ask for a set of wide shots (to show location) plus close-ups (to show sequencing) at each stage:

• Drip edge + underlayment at edges (direction matters): close-up at an eave showing underlayment overlapping the drip edge, and a close-up at a rake showing drip edge over the underlayment (the direction-specific sequencing is commonly taught in inspector training materials like InterNACHI’s Asphalt Student Book).

• Starter strip: a photo along the eave before the first course goes on, so you can see starter placement and adhesion line.

• Valleys (before they’re covered): one full-length valley shot and two close-ups at the top and bottom showing the exact valley method and how underlayment/valley material laps.

• Leak barrier/ice-and-water where used: close-ups at the most failure-prone spots (valleys, around chimneys, plumbing boots, and other penetrations) before shingles cover it.

• Flashing integration (the leak zone): step flashing at roof-to-wall, chimney flashing details, and any kick-out flashing, photographed before and after shingles tie in.

• Penetrations: close-up of each plumbing boot and vent termination showing it sits flat, gets properly sealed, and gets shingled in correctly.

If you only do one thing differently because you’re near the coast: require at least two photos that clearly show the edge and flashing sequencing, because that’s where wind-driven rain exploits shortcuts.

Most roof leaks start at chimneys, walls, and penetrations where flashing details are easy to shortcut but hard to prove later. Read more in our article: Roof Leaks Chimneys Vents

Wind-Resistance Checks: Nailing and Shingle Rating

In coastal North Carolina, “wind-rated shingles” only help if the contractor installs them exactly the way the manufacturer ties to that wind coverage. That means you don’t just verify a nail count; you verify the product’s wind classification and the fastening method required for your exposure. If you accept “we always do six nails” as the whole plan, you’re left with a claim you can’t meaningfully verify after the fact. Show me where it says that.

Ask for two pieces of proof you can keep in your job folder, like receipts you can actually use: the shingle wrapper label or product data sheet showing the wind testing/class (often referenced as ASTM D3161 or ASTM D7158) and the manufacturer’s required fastening pattern for that specific shingle in your wind conditions (for example, GAF’s Steep-Slope Pro Field Guide discusses when six nails per shingle may be required for enhanced wind coverage or by local code). For example, some high-wind installs call for a six-nail pattern per shingle, but it’s only meaningful if those nails land in the shingle’s nailing zone.

During install, request a few close-up photos that make “installed right” visible:

• Nail placement: nails centered in the manufacturer’s nailing zone (not high above it).

• Nail quality: heads flush to the shingle (not overdriven cutting into the mat, and not underdriven sticking up).

• Pattern confirmation: a clear photo showing the actual per-shingle nail pattern they’re using (four vs. six, and where).

You can’t safely lift random shingles later without breaking seals, so nail-zone photos should be treated as core quality control.

Final Inspection: What Should Be True at Completion

A clean-looking roof and a clean close-out are not the same thing, and the gap shows up when the first leak call turns into “prove it.” The last hour of checking and paperwork is what keeps a small issue from becoming a months-long back-and-forth.

Even when it looks “finished,” it can still be wrong in the leak and wind paths, so stick to the final checks you can do safely. Let’s not cut corners: from the ground, scan for straight lines and neat flashing; in the attic, look for new daylight or drips.

Before final payment, ask for a close-out package, including Owens Corning shingle/roofing warranty paperwork if that’s the brand installed. I’m not signing off on that yet without the final photo set, permit sign-off, workmanship terms, and a clear leak-response plan.

After a named storm, the fastest way to avoid a denied claim is to document missing tabs, lifted edges, and new flashing issues before temporary fixes blur the evidence. Read more in our article: After Hurricane Roof Check