Roof installation day moves faster than most homeowners expect. A crew that arrives at daylight can have your old roof off, the decking inspected, and a new system installed before dinner — and if you know the rhythm of the day, you can tell at a glance whether the work is going the way it should.
Here is how a typical single-day replacement unfolds on a North Texas home, from the first truck in the driveway to the last pass with the magnet.
First Light: Arrival and Staging
Crews start early here, especially between May and September, because the roof surface is workable at sunrise and punishing by two in the afternoon. Trucks arrive, ladders go up on two or more elevations, and the dump trailer is backed into position at the driveway.
The foreman does a walkaround with you or by phone: confirming the color and product, pointing out where material is staged, and noting anything unusual — a fragile garden bed, a detached garage, a gate that stays closed for the dog.
Material was usually delivered a day earlier or arrives now, boomed onto the roof in bundles spread across the slopes so no single rafter bay carries the load.
The First Hour: Protection Goes Down Before Anything Comes Off
Nothing gets torn off until the ground is protected. Tarps go over landscaping beds, plywood leans against siding and windows below the eaves, and gutter guards or standoffs keep ladders from crushing the gutter lip.
Watch for this step. A crew that starts ripping shingles before the tarps are down is telling you what the cleanup is going to look like.
Mid-Morning: Tear-Off
This is the loud part. Crews work a slope at a time with roofing shovels, stripping shingles, felt or synthetic underlayment, drip edge, pipe boots, and old flashing straight down to bare decking. Debris slides into the trailer or into a catch tarp, and a ground man keeps the perimeter clear.
Old flashing comes off with it. Reusing bent step flashing or a rusted valley is one of the shortcuts that turns a new roof into a leak two seasons later — which is why full removal is standard on a proper roof replacement.
Late Morning: Decking Inspection and Repairs
With the deck bare, the crew walks every square foot of it. They are looking for soft spots, delaminated plywood, rot along the eaves, cracked planks, and any daylight showing at penetrations.
Bad sheets are cut out and replaced, and loose decking is re-nailed to the rafters. This is the one part of a replacement that cannot be quoted precisely up front, because nobody can see the deck until the old roof is off. Any replacement should be photographed and shown to you before the new material covers it — more on that in our guide to roof decking replacement.
Midday: Dry-In
Once the deck is sound, the roof gets sealed against weather. Drip edge goes on at the eaves, ice-and-water or self-adhered membrane goes into valleys and around penetrations, and underlayment is rolled and fastened across the field.
At this point your home is weather-tight. If an afternoon storm rolls in off the plains, the dry-in is what keeps the interior dry, and it is why a crew will always finish this step before shingles.
Afternoon: The Install Sequence
Shingles go on in a set order, and the order matters:
- Starter course along the eaves and rakes, with the sealant strip oriented correctly so the first row bonds down.
- Field shingles worked up from the bottom in a staggered pattern, nailed in the manufacturer's nail zone at the specified count.
- Flashing installed as the courses rise — step flashing woven at walls, apron flashing at the base of chimneys, counter flashing tucked in.
- Pipe boots and vents set, sealed, and shingled over.
- Valleys closed or laced according to the system.
- Ridge vent and ridge caps last, which finishes the exhaust side of the ventilation system.
Evening: Cleanup, Magnet Sweep, and Walkthrough
Cleanup is not an afterthought — it is a real phase of the day. Tarps come up loaded, gutters are cleared of nails and granules, and the crew runs rolling magnets over the driveway, walkways, lawn, and flower beds, then again along the drip line where nails bounce.
Then comes the walkthrough. The foreman shows you the finished slopes, the new flashing details, the ridge, and any decking photos from the day, and confirms your paperwork and warranty registration. Keep the checklist in our after your new roof guide handy for that conversation, and if you have not read it yet, our home prep guide covers what to do the night before.
Frequently Asked Questions
What time does a roofing crew usually start on installation day? Early. In a North Texas summer, crews often start right at first light to get tear-off and dry-in done before the worst afternoon heat. We confirm the arrival window with you the day before so you are not guessing.
What happens if bad decking is found under my old roof? Rotted or delaminated decking is photographed, shown to you, and replaced before anything goes back down. Decking is only visible once the old roof is off, so it is handled as a documented change during the job.
Is my roof left open overnight if the job is not finished? No. A crew never leaves bare decking exposed. Any area torn off during the day is dried in with underlayment before the crew leaves, so the home is weather-tight even if shingles go on the next morning.
Want a crew that runs the day like this? Call Cannon Roofing at (940) 627-1045 or request a free quote. We have been installing roofs across Decatur and Wise County since 1994.