How Long Does a Roof Replacement Take?

There is no honest single number. The time on your roof itself depends on its size, pitch and complexity, how many old layers come off, what the crew finds in the deck underneath, the material, and the weather. The calendar time around it depends on the estimate and contract, material ordering, the city permit, and the final inspection. A good roofer can give you a schedule for your house after seeing it; ask for one in writing, with what could change it.

This guide walks through each phase and what moves it. For what the paperwork should contain, see what a Texas roof replacement estimate should include.

The phases, start to finish

1. Inspection and estimate. The roofer looks at the roof, the attic and the edges, measures, and writes up scope. Insist on it being done without you on the roof.
2. Decision and contract. You compare the scope, choose materials, and sign. If you are still deciding between materials, read asphalt shingles vs. metal roofing in Texas.
3. Permit. In Dallas, the City's construction code says new roof coverings must not be applied without first obtaining a permit, and the reroof permit application must list where the debris will be disposed of. Other cities have their own rules.
4. Material order and delivery. Shingles, underlayment, flashing metal, vents and a dumpster are staged, often in the driveway.
5. Tear-off. Under the building code, a roof replacement removes existing layers down to the deck.
6. Deck inspection and repairs. With the old roof off, damaged or rotted sheathing becomes visible and is replaced.
7. Dry-in. Underlayment, drip edge and valley linings go on so the house is protected even before the finished covering.
8. Flashing, vents and the new covering. Shingles or metal are installed, with flashing at walls, chimneys and penetrations and the ventilation the plan calls for.
9. Cleanup. Debris is hauled away and the yard and driveway are cleaned.
10. Final inspection and closeout. In Dallas, a final inspection and approval are required when reroofing is complete, and the City says none is given until proof is submitted that the debris went to a City of Dallas landfill or transfer station. Then you receive warranty documents and final invoice.

What makes the work on the roof take longer

• Size and complexity. Roofs are measured in "squares" of 100 square feet. More squares, more valleys, dormers, chimneys and skylights all add time.
• Pitch and height. Steeper and taller roofs need more safety setup and slow the crew.
• Layers to remove. More layers mean more tear-off and more debris. Whether a new roof may go over the old one (a "recover") is limited by code: the 2021 IRC does not allow it over a water-soaked or deteriorated roof, over certain tile or slate, or over too many existing layers, and Dallas has its own amendment on the layer count. Your contractor and the City decide whether it applies to your house.
• Deck condition. Rotted or damaged sheathing is only fully known after tear-off. Ask how deck replacement is priced and how it affects the schedule.
• Flashing. The code requires rusted, damaged or deteriorated flashing and vents to be replaced during a reroof. A chimney that needs a new cricket or counterflashing adds time; see roof flashing explained.
• Ventilation changes. Adding a ridge vent, opening soffits or closing old vents is extra work. See roof ventilation in Texas.
• Material. Metal panels may be made or cut to length for your roof, and some products or colors may need ordering. Ask about lead time before you pick a color.

What makes the calendar longer

• Weather. Crews generally avoid tearing off a roof when rain is likely. In Texas, storm season can also mean a surge in demand after hail.
• Cool weather and shingle sealing. IBHS explains that the sealant strip on asphalt shingles activates under the heat of the sun. Ask your roofer how they handle installation in cooler weather and what the shingle manufacturer requires.
• Permits and inspections. Permit review and inspection scheduling depend on the City. The Dallas code also allows the building official to require special inspections.
• Historic or special districts. In Dallas, the City's FAQ notes that some permit exemptions do not apply in historic, conservation and planned development districts, and HOA approval can add time anywhere.
• Insurance-related work. If an insurance claim is involved, ask your insurer how their inspections and payments are scheduled before you set a start date. We do not give insurance advice.

How to prepare for the work days

• Move vehicles out of the driveway and garage if the roofer asks.
• Take wall hangings and fragile items down on top-floor walls; hammering carries through the framing.
• Cover belongings stored in the attic, if any, or move them.
• Keep children and pets away from the work area and the dumpster.
• Mark sprinkler heads, septic lids or anything in the yard a dumpster or crew could damage.
• Ask where the crew will park and where materials will be staged.

Questions to ask for a realistic schedule

1. How many working days on the roof do you expect for my house, and what could change that?
2. Who pulls the permit, and how long has permitting been taking lately?
3. Are you tearing off or recovering, and why is that allowed for my roof?
4. How do you price and schedule deck replacement found after tear-off?
5. What is the lead time on the material and color I picked?
6. What happens if rain is forecast mid-job? How is the house protected overnight?
7. When will the final inspection happen, and when do I get the warranty paperwork?

How HVACandRoof matching works

HVACandRoof is starting pilot coverage in Illinois and Texas. Send your ZIP code through the estimator and we confirm whether a screened contractor is available near you. When one is, your request goes to screened contractors whose service area covers your ZIP; the first to accept takes the job and the others are withdrawn, so you deal with one contractor, not competing bids. Requesting a match is free. See how it works.