For a typical single-family home, tear-off and install takes 1-3 days, weather permitting. Here's what actually happens each day, and what pushes a project past a weekend.
Most Naperville-area homes get a full tear-off and reroof done in 1 to 3 days once the crew is on site and weather cooperates. That's the actual installation window — it doesn't include the time spent on your estimate, material ordering, or permit approval when your job needs one, which typically adds 1-3 weeks before the crew ever shows up.
The crew strips existing shingles and underlayment down to the decking, inspects the plywood for soft spots or rot, replaces any damaged sheets, and installs ice-and-water shield along the eaves and valleys plus synthetic underlayment across the field. On a straightforward roof, tear-off and dry-in often finish the same day, leaving the roof weather-tight overnight even if shingles aren't on yet.
Shingles go on starting at the eaves and working up, followed by ridge cap and ventilation components, flashing around chimneys and penetrations, and a final walkthrough. Crews then run a magnetic sweep of the yard and driveway for stray nails before hauling away the old material. For a smaller or simpler roof, this can happen the same day as tear-off.
Multiple valleys, dormers, and steep pitches slow crews down and may need extra safety setup — add 1-2 days for a large or intricate roofline.
A roof with two existing shingle layers takes longer to strip than one layer — Illinois code generally limits roofs to two layers before a full tear-off is required anyway.
If tear-off reveals soft or rotted plywood — common around old skylights, chimneys, or past ice dam damage — replacing sheets adds a few extra hours to a full day.
A standard asphalt shingle re-roof on existing sheathing is permit-exempt in Naperville, but metal, membrane, or other materials — or any job needing decking replacement — require one, and inspection scheduling can add lead time even though it rarely stops work mid-project.
Rain, high wind, or extreme cold can pause work for safety and material-application reasons — the single biggest scheduling variable in Illinois.
It helps to separate "how long is the crew on my roof" from "how long until my roof is done." The full process — inspection, estimate, material selection, permit approval, and install — typically runs 2-4 weeks depending on your municipality and material availability, even though the physical work is only 1-3 days of that window. See our roof replacement overview for the full process, or roof replacement cost for what drives pricing alongside timeline.
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