Home Roof Replacement

What to Expect During a Roof Replacement

A roof replacement is loud and busy, but it follows a predictable sequence. Knowing the steps, and how to get your home ready, makes the project go more smoothly for everyone.

Updated October 14, 2026

Signs you may need a new roof

Some roofs make it obvious they're done; others hide it. Watch for:

Getting an estimate

A good estimate starts with an inspection: measuring the roof, checking the attic and noting trouble spots such as flashing, ventilation and soft decking. Ask for a written estimate that names the specific roofing product, the underlayment and ice-and-water shield, the flashing and ventilation work, and how decking repairs will be priced if the crew finds damaged boards. That level of detail lets you compare bids line by line instead of just comparing totals. If you haven't settled on a product yet, start with our overview of roofing materials for Colorado's climate, and before you sign, review our tips on choosing a roofing contractor.

Cross-section of a roof edge above an exterior wall, cut back in steps to show each layer: a wood roof deck on a rafter, a dark ice-and-water shield running up from the eave past the wall, light underlayment lapping over the top of the shield and continuing up the roof, and red shingles along the lower edge
A new roof goes on in layers: the deck, ice-and-water shield along the eave, underlayment over the rest of the deck, then shingles. A detailed estimate names the product for each layer.

Permits and scheduling

In Colorado, cities and counties handle roofing licenses and permits, and most Front Range jurisdictions require a permit for a reroof. Your contractor should pull it. Start dates depend on weather, material availability and demand, and roofers' calendars can fill quickly after a big hailstorm. Crews avoid rain, high wind and icy conditions, and in cold weather they may need to follow the manufacturer's cold-weather instructions, such as hand-sealing shingles.

What happens on the job

Your contractor should give you a timeline. A straightforward asphalt reroof often takes a day or two, while larger, steeper or more complex roofs take longer. The work usually follows this order:

Two roofers in hard hats kneel on a roof stripped down to its wood deck, with torn roofing material and debris around them.
Illustrative image. Tear-off takes the roof down to the deck, so the crew can find and replace damaged sheathing before the new layers go on.
  1. Setup. The crew positions a dumpster or trailer and covers landscaping, siding and walkways.
  2. Tear-off. Old shingles, underlayment and worn flashing come off down to the roof deck.
  3. Decking repair. Soft, rotted or damaged sheathing is replaced so the new roof has a solid base.
  4. Underlayment and ice-and-water shield. Metal drip edge goes along the roof edges, and a self-adhering ice-and-water membrane is applied at the eaves and in the valleys, which is standard practice in Colorado. Underlayment covers the rest of the deck.
  5. Flashing. Flashing is installed around chimneys, walls, skylights and valleys, and plumbing vents get new boots. Ask ahead of time which flashing will be replaced and which, if any, will be reused.
  6. Ventilation. Intake and exhaust vents, such as ridge vents, are installed or updated so heat and moisture can escape the attic.
  7. Roofing. Starter strips, shingles and ridge caps go on according to the manufacturer's instructions.
  8. Cleanup. The crew hauls away debris, clears gutters and runs magnet sweeps across the lawn, driveway and flower beds to pick up stray nails.
  9. Final inspection. Many jurisdictions send a building inspector, and your contractor should walk the finished job with you before asking for final payment.
Eight numbered steps along a winding path: 1 estimate with a clipboard, 2 permit with a stamped document, 3 tear-off with shingles lifting off the deck, 4 deck repair with a wood panel and hammer, 5 underlayment with a roll, 6 new roofing with a shingled roof, 7 cleanup with a magnetic nail sweeper, and 8 final inspection with a magnifying glass and check mark
The whole project at a glance, from the first estimate to the final inspection. New roofing includes the flashing, vents and shingles, and cleanup includes magnet sweeps for stray nails.

How to prepare your home

A house with a cutaway attic where stored items sit under a blue tarp, a dog looking out a window, a grill and patio chair moved away from the wall, a car driving away from the house and a freshly mowed striped lawn, each with a label
Most prep can happen the day before. Clearing space around the house and protecting the attic keeps belongings safe, and a freshly mowed lawn helps the magnet sweep find stray nails.

After the crew leaves

Walk the property, look over the roof from the ground and ask about anything that seems off before you make the final payment. Keep the contract, final invoice, permit sign-off and warranty paperwork together, and ask for lien waivers when you pay. The National Roofing Contractors Association also offers general information for homeowners about roof systems and working with a professional roofer.

When you're ready to move forward, talk to Truman Roofing about replacing your roof. They're the team we recommend for roof replacement in Colorado, and they keep the process easy from estimate to cleanup. You can also read what to expect from a Truman Roofing project before your start date.