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Quick, low-risk steps

  1. Use binoculars or ground-level photographs to assess roof condition without climbing.
  2. Collect your roof's age, material, and any prior repair records.
  3. Measure the roof's footprint and note its pitch if safely possible.
  4. Ask each bidder to state measured area and assumptions in writing.
  5. Separate required scope from optional upgrades in every quote.
  6. Verify if a permit is needed through the City of Atlanta's permitting services.

Useful video

Compare common roofing materials

Before comparing prices, identify what work is actually included. Use the material comparison to identify what the proposed roof system includes before comparing written scopes. Use this overview to recognize major material categories before comparing contractor scopes. Your quote still needs project-specific details such as underlayment, flashing, ventilation, decking allowances, permits, and warranty terms. The video is process context, not a current local price estimate.

Video: Comparing Roofing Materials | Ask This Old House by This Old House.

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How Roof Size and Pitch Affect Cost

Roofers calculate the area in squares (100 square feet). A larger roof requires more materials and labor. The pitch, or steepness, also matters because steeper roofs are harder and slower to work on, increasing labor cost.

Ask each contractor how they measured your roof and what pitch they assumed. Differences in these numbers can explain large quote variations.

  • Request the total number of squares in the bid.
  • Confirm the pitch measurement method used.
  • Understand that complex roof shapes add waste and labor.
  • Compare the measured area across multiple quotes.

Tear-Off, Decking, and Disposal

Removing old shingles (tear-off) adds labor and disposal fees. If the roof has multiple layers, tear-off is more expensive. The decking underneath may need repair or replacement if it's rotted or damaged.

A decking allowance in the quote covers a certain amount of replacement wood. If more is needed, it becomes a change order. Ask how the allowance works and what the per-sheet cost is beyond it.

  • Check if the quote includes full tear-off or an overlay.
  • Ask about the decking allowance and per-sheet price.
  • Confirm disposal fees are included.
  • Inquire about dumpster placement and site protection.

Materials, Underlayment, and Flashing

Asphalt shingles are common, but metal, tile, or slate cost more. Underlayment and leak barriers protect against water intrusion. Flashing around chimneys, vents, and valleys must be replaced or properly integrated.

Material warranties vary. Some cover only the product, while others include labor. Understand what's covered and for how long before choosing a system.

  • Compare material types and their expected lifespans.
  • Ask about underlayment grade and ice/water shield placement.
  • Ensure flashing replacement is in the scope.
  • Review warranty terms for materials and workmanship.

Permits, Inspections, and Hidden Costs

In Atlanta, a permit is typically required for roof replacement. The City of Atlanta's Department of City Planning handles permits and inspections. The cost of the permit and any required inspections should be in your quote.

Hidden costs can include rotten decking, code upgrades, or unexpected structural repairs. A good quote will explain how these are handled. Always get a written change-order process.

  • Verify that the permit fee is included in the bid.
  • Ask who schedules and attends inspections.
  • Understand the change-order policy for unforeseen work.
  • Check if the contractor carries liability and workers' compensation insurance.

Take this with you

Evidence and scope checklist

  • Total roof area in squares and pitch measurement
  • Tear-off and disposal included or overlay option
  • Decking allowance and per-sheet replacement cost
  • Underlayment type and leak barrier locations
  • Flashing replacement scope
  • Ventilation and vent upgrades
  • Material system and warranty details
  • Permit and inspection responsibilities
  • Site protection and cleanup plan
  • Change-order terms and payment schedule
Open the interactive private worksheet →

Common questions

What homeowners ask next

Why do quotes for the same roof vary so much?

Differences often come from measurement assumptions, material grades, tear-off inclusion, decking allowances, and overhead. Always compare line items, not just the bottom line.

Do I need a permit for roof replacement in Atlanta?

Yes, the City of Atlanta generally requires a permit for roof replacement. Check with the city's permitting services for current rules, as requirements can change.

What is a decking allowance and why does it matter?

It's an amount of wood replacement included in the base price. If your decking has more rot than expected, you'll pay extra per sheet. Clarify this before signing.

Evidence

Sources used for this guide

Research checked July 31, 2026

Optional next step

Need an on-site professional?

Use the guide and worksheet first so you can describe the situation and compare the full scope. A referral is optional; you can also contact a licensed local provider directly.

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We have not enabled a provider route for this site. Use the checklist to contact and verify local providers yourself; urgent hazards should go to the appropriate emergency or public service.