Roof replacement timeline, Royal Oak: two roofers shingling a brick home on a frosty late-autumn morning, a dumpster in the driveway

How long does a roof replacement take, and can you do it in winter?

The crew is usually on the roof for a day or two. The weeks around it, and Michigan's weather, decide when you actually get a new roof. Here's the timeline, and what changes when the job runs into winter.

  • Day-by-day timeline
  • Best season in Michigan
  • Winter installation rules

Published · Updated

The short answer

GAF says an asphalt shingle replacement on an average-sized home can often be done in one to two days. Rotten decking, a steep or complex roof, weather and ventilation fixes add time, and there are usually weeks of lead time for the estimate, scheduling and any permit. Winter re-roofs are possible on mild days, but GAF recommends installing at 40°F or warmer; in the cold, shingles need hand-sealing and may not self-seal until spring.

How long a roof replacement takes

GAF, the shingle manufacturer, says "an asphalt shingle roof replacement on an average-sized home can often be completed in one to two days," with the tear-off usually taking a few hours.

What stretches it, according to GAF:

  • Hidden rot in the decking, found once the old shingles are off
  • A steep pitch, or many intersecting planes, dormers and valleys, which is common on Royal Oak Tudors and colonials
  • Rain, frost or high wind on installation day
  • Correcting attic ventilation during the job
  • Site access: tight lots, long driveways and garages at the back of the lot

Need this done?

Planning a re-roof? Ask for an estimate early: scheduling, materials and a permit all take time before the crew arrives.

Roof replacement in Royal Oak

The timeline, step by step

Estimates and choosing a roofer

The roofer inspects and measures the roof, and you compare written scopes. Getting two or three estimates takes time, so start before the roof is leaking.

Permit

A re-roof in Royal Oak likely needs a building permit under the state code's permit rules (2015 Michigan Residential Code R105.1 and R105.2), and roofers that work in the city say it requires one. The city doesn't publish a re-roof rule, so confirm with the Building Division (248-246-3210) and ask whether the roofer pulls the permit. The reroof permit checker explains what to ask. Nearby cities set their own rules; Troy, for instance, publishes its re-roof permit and inspection steps (see roof replacement in Troy).

Scheduling and materials

Busy roofers book weeks ahead in peak season, and special-order shingle colors or metal panels add lead time. Ask for a start window in writing.

Day one: tear-off and dry-in

Crews strip the old roofing to the decking, replace any rotten sheets, then lay ice and water shield at the eaves and underlayment over the rest so the house is protected that night.

Day one or two: shingles, flashing and vents

Drip edge, flashing, pipe boots, ridge vent and shingles go on, then a cleanup with a magnetic nail sweep of the yard and driveway.

Afterward

Any final permit inspection, the final invoice and your warranty paperwork. Keep it with the house records; a future buyer will ask how old the roof is.

The best time to replace a roof in Michigan

GAF calls summer the most ideal time for installing a new roof, with long stretches of good weather, though crews start early on hot days. Spring brings severe thunderstorms, so forecasts need watching. Fall has milder temperatures and less severe weather, and is when many owners want the job done before winter.

Around Royal Oak that makes late spring through fall the busy season. If your roof is still sound, booking an estimate in late winter or early spring gives you the widest choice of dates.

Can you replace a roof in winter?

Yes, on the right days, with care. GAF's cold-weather guidance:

  • GAF's official recommendation is to install shingles at temperatures of at least 40°F; below that they lose flexibility and may crack
  • The adhesive strip that bonds each shingle to the one below needs warmth and sun above 40°F to activate. In cold weather, shingles must be sealed by hand
  • Shingles should be stored warm, at about 70°F for at least 24 hours before installation, not left out in the cold
  • The deck must be clear of snow, frost and ice, and dry
  • Jobs can be spread over several days to work in the warmest hours

If the roof is leaking now and the weather is wrong for a full re-roof, a temporary repair or tarp can hold until spring. See roof leak repair for what to do in the meantime.

Winter installs and wind warranties

GAF says shingles installed in fall or winter may not seal until the following spring, and that sealing failures and related wind damage are generally not covered by manufacturer warranties. Ask the roofer how they'll hand-seal, and which days they'll work.

Preparing for roof day

  • Move cars out of the driveway and garage, and anything fragile away from the walls
  • Take pictures and mirrors off walls on the top floor; hammering shakes them
  • Cover belongings in the attic, as dust and debris can fall through
  • Keep pets and children indoors, away from the work area
  • Agree where the dumpster goes, and ask about protecting plants and the lawn

For what a re-roof costs and what belongs in the estimate, see the roof replacement cost guide.

Questions about roof replacement timeline

How long does a roof replacement take?

GAF says an asphalt shingle replacement on an average-sized home can often be completed in one to two days. Rotten decking, a steep or complex roof, bad weather and ventilation fixes add time.

What's the best time of year to replace a roof in Michigan?

GAF calls summer the most ideal time, and fall has milder temperatures and less severe weather. Late spring through fall is the busy season around Royal Oak, so book an estimate early.

Can shingles be installed in winter?

Yes, on suitable days. GAF recommends installing at 40°F or warmer, storing shingles warm and hand-sealing them in the cold. Shingles installed in fall or winter may not self-seal until spring.

Do I need to be home during the roof replacement?

Not usually, but someone should be reachable in case the crew finds rotten decking and needs a decision. Agree how extra decking is priced before work starts.

Do I need a permit to replace my roof in Royal Oak?

Likely. The state code requires a permit for most alterations, and roofers that work in Royal Oak say the city requires one for a roof replacement. The city doesn't publish a specific re-roof rule, so confirm with the Building Division at 248-246-3210.

Where this information comes from

The facts and figures on this page come from these published pages, checked on October 12, 2026.

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