Should a New Roof Be Inspected After It Is Installed?

A roof looks finished the moment the last shingle goes down and the ladders come off the truck. That is also exactly the wrong moment to stop paying attention. A completed reroof should end with a real closing walkthrough, not a wave from the driveway, and knowing what that walkthrough should include is the difference between a homeowner who can tell a good job from a rushed one and a homeowner who finds out three winters later. None of what follows is about assuming the worst of your installer. It is about knowing what a careful crew already checks, so you can ask to see it.

01 / THE SHORT ANSWERYes, a finished roof should be inspected before the crew leaves

A proper closing inspection on a new roof covers five things: the nailing pattern across the field, every flashing detail, the ridge and valley work, the seal around each penetration, and a full site cleanup that includes a magnet sweep for stray nails. A reputable crew walks this list themselves before calling the job done, and a homeowner who understands the list can follow along, ask a few pointed questions, and know what good work actually looks like rather than taking a handshake on faith.

This is not about distrust. Most Macomb County roofing crews take real pride in a clean finish, and a good foreman wants you to see the work up close as much as you want to see it. The point of this guide is simply to put the checklist in your hands, the same one a careful crew already runs through, so the final walkthrough is a conversation between two people who both know what they are looking at instead of a homeowner nodding along at whatever they are shown.

02 / THE FASTENERSThe nailing pattern: the detail no one thinks to check

Shingles are rated for wind resistance based on a specific nailing pattern set by the manufacturer, and it is the single most common place a roof underperforms its rating without anything looking wrong from the ground. Manufacturer instructions call for a set number of nails per shingle, usually four in standard wind zones and six in higher-exposure areas, driven flush into the reinforced nailing strip printed on the shingle itself, not above it into open air and not below it where the seal strip on the shingle beneath it lives.

Why nail placement decides your warranty

A nail driven too high misses the strip entirely and holds the shingle by friction alone. A nail driven too low can puncture the seal strip of the course below, which is exactly where wind gets a grip and starts a lift. Overdriven nails cut into the shingle mat and lose their grip over time; underdriven nails sit proud and eventually work themselves loose, backing out enough to catch water at the head. None of these mistakes are visible from the street, and most are not visible from the roof surface either, once the shingle above has settled over the nail line.

What a spot check actually looks like

A real spot check means lifting a handful of shingle tabs at different points across every slope, not just near the ridge or eave, and looking at the nail heads underneath: are they flush, are they in the strip, are there four or six per shingle as the wind zone calls for. It takes a few minutes and it is the fastest way to tell a crew that worked to spec from one that rushed the fastening to hit a schedule. If you were not shown this during your own closing walkthrough, it is a fair and reasonable thing to ask for afterward.

03 / THE FLASHINGFlashing details: where a finished roof actually gets tested

Flashing is the metal that seals a roof wherever it meets something else, a wall, a chimney, a valley, or a vent, and it is where the overwhelming majority of new-roof leaks eventually start. A closing inspection should walk every one of those transitions individually, because a flashing detail either sheds water correctly or it does not, and there is very little middle ground once weather starts testing it.

Sidewalls, chimneys, and step flashing

Where a roof plane meets a wall, step flashing should be woven in individually with each shingle course, not run as one long continuous piece that only looks sealed. Chimneys need counter-flashing set into the masonry itself, cut and sealed cleanly, not caulked over a gap as a shortcut. A quick visual check: does the metal lie flat and tight against both surfaces, and is there any sign a bead of sealant is doing a job the metal itself should be doing.

Drip edge and kick-out flashing

Drip edge along the eaves and rakes is one of the most commonly shorted details on a budget reroof, and a kick-out flashing, the small diverter where a roofline ends above a lower wall, is one of the most commonly forgotten. Both are inexpensive pieces of metal, and both prevent water from running behind siding or down a fascia board for years afterward. If you cannot see drip edge along the whole eave line, or there is no small diverter piece where your roof meets a lower wall or porch, ask about it directly.

04 / THE HARD LINESRidge and valley execution: the two places every roof plane meets

A ridge is the easiest place on a roof to shortcut and the easiest place for an inspector to check. Ridge cap shingles should be sized and nailed to the manufacturer's specification, with nail lengths long enough to reach the deck through a ridge vent baffle when one is installed, not just tacked into the cap material itself. A ridge line that wanders, gaps between cap pieces, or exposed nail heads along the ridge are all signs of a rushed finish on a detail that takes real time to do correctly.

Valleys carry more water than any other part of a roof, because two planes drain into one line. Open metal valleys, closed-cut valleys, and woven valleys are all legitimate methods, but each has to be executed to spec: metal valleys need the right width and fastening pattern set back from the centerline, closed-cut valleys need the underlying course properly lapped before the top shingle is trimmed over it. A valley that looks fine in dry weather can still be under-built, and the surest way to catch a shortcut here is simply asking your installer which valley method they used and why, before the job starts, and confirming it matches what actually got installed.

VALLEY METHOD	HOW IT WORKS	WHAT TO CHECK
Open metal	Exposed metal channel down the valley center	Correct width, fastening pattern set back from centerline
Closed cut	Shingles from one side run through, trimmed over the other	Full underlayment lap before the top layer is cut
Woven	Shingles from both sides interlace across the valley	Even weave with no gaps at the crossing points

05 / THE PENETRATIONSPenetration seals: pipes, vents, and skylights

Anything that pokes through the shingle field, a plumbing vent, a bath fan outlet, a satellite mount, or a skylight curb, is a manufactured weak point that has to be sealed correctly rather than caulked shut as an afterthought. Rubber pipe boots should sit snug against the pipe with the shingle courses properly lapped over the top of the boot's upper flange, never sealant smeared where a proper lap should be. A boot installed backwards, with shingles running under instead of over the top flange, is a leak on a delay, not a leak that shows up on day one.

Skylights and larger roof-mounted equipment get their own flashing kit from the manufacturer, and a closing inspection should confirm that kit was used as designed rather than substituted with generic flashing and extra caulk. If your roof has a skylight, a solar-ready standoff, or any other larger penetration, it is worth asking specifically how that detail was flashed, since it is easy for it to get glossed over in a general walkthrough focused mainly on the shingle field.

06 / THE CLEANUPSite cleanup and the magnet sweep

A reroof drops a genuine hazard across your property: loose nails, in the grass, the driveway, the flower beds, and anywhere a tarp did not fully cover. A magnet sweep, a roller magnet pushed across the lawn, driveway, and walkways in more than one direction and more than once, is standard practice for a crew that takes cleanup seriously, and it is one of the easiest things to ask about directly, since a good contractor will already tell you when and how many passes they made.

Gutters and downspouts deserve a look too, since tear-off debris and old granules commonly end up there whether or not anyone meant them to. A quick check that water actually runs freely off the roof and away from the foundation closes the loop on a job that is finished in every sense, not just finished on the surface that is easiest to photograph from the yard.

07 / THE PAPERWORKWarranty documentation, and when an independent look is reasonable

Before the crew leaves for good, you should have paperwork in hand, not a promise to email it later. That means the manufacturer's warranty registration for the shingles themselves, a written workmanship warranty from the installer stating what it covers and for how long, and an invoice or spec sheet listing the actual materials used, shingle line, underlayment type, ventilation components, so there is a record if a question comes up years from now. A workmanship warranty is separate from the manufacturer's material warranty, and a homeowner should know which one covers what before signing off on the job.

A finished roof should come with proof, not just a handshake. If the paperwork is not in your hands before the truck pulls away, ask for it before you sign anything final.

If your roof was installed by a crew you did not choose carefully, an out-of-state storm chaser, a name you cannot easily find a local address for, or an installer who skipped the closing walkthrough entirely, getting an independent set of eyes on the finished roof is a reasonable and inexpensive step, not an overreaction. This is exactly the kind of visit a free roof inspection is built for, whether or not we installed the roof ourselves: a ground-to-attic look with photos of the nailing, the flashing, the ridge and valley work, and the penetrations, so you know what you actually paid for. If you want the full list of what a thorough independent check covers, our roof inspection checklist lays it out point by point.

None of this is about assuming your new roof was done wrong. Most are not. It is about being able to tell the difference yourself, and knowing that a second opinion is available, fast and at no cost, if something about the closing walkthrough left you with more questions than answers. If you are earlier in the process and still deciding what a full replacement should cost or include, our roof replacement cost guide and the 60-second cost calculator are good starting points, and if you already have questions lined up for whoever inspects the finished work, our guide to questions to ask a roof inspector covers exactly that ground.