Understand your roofing estimate before you sign

Start with roof surface area, not the floor area of your house. Ask how the roofer measured each slope and whether the material quantity includes cutting waste. Roofing squares measure 100 square feet of roof area; square feet, squares, bundles, and linear feet are not interchangeable quantities.

Pitch, building height, access, dormers, valleys, and roof-to-wall intersections change labor and material needs. Removing multiple existing layers adds handling and disposal. A tight driveway, overhead wires, landscaping, or limited dumpster placement can also change how debris and materials move.

For repairs, the diagnosis drives the scope. Replacing damaged shingles is different from rebuilding chimney flashing or opening a valley to replace wet decking. Ask which observations support the proposed repair and what remains uncertain until materials are lifted. Interior staining alone does not define the roof repair boundary.

Trace the proposed work from the deck outward: deck inspection, underlayment, leak barriers, edge metal, starter strips, roof covering, and ridge caps. GAF describes these as parts of a roofing system rather than treating shingles alone as the roof. Each included product needs an identifiable name and installation location.

Read flashing separately. Ask for decisions at valleys, sidewalls, chimneys, skylights, and pipe penetrations, including what will be replaced and what will remain. A blanket statement that flashing is included does not identify whether the roofer plans to remove siding or disturb masonry to complete the connection.

Include an attic assessment when moisture or ventilation is part of the problem. The Department of Energy identifies roof leaks, flashing defects, indoor moisture, and ventilation problems as possible attic moisture sources. Ask how the proposed roof work addresses the observed cause, and whether attic or exhaust-duct work belongs in a separate scope.

Before comparing totals, align roof areas, removal layers, material series, flashing replacement, ventilation work, cleanup, and warranty selections. Mark each item as included, excluded, or unresolved. An estimate for shingles over an existing roof is not the same project as removal down to the deck.

Separate confirmed work from concealed-damage allowances. Ask each roofer to state any included decking quantity, the unit used for additional replacement, and the approval process. Request photos and measured quantities before authorizing extra work. A per-sheet allowance and a per-square-foot allowance need matching material specifications to compare.

Request a revised written proposal when scope changes. Keep optional skylight replacement, gutter work, insulation, solar removal, and interior repairs separate so you can see which choices change the total. Henry Check helps identify comparison questions; a price-range comparison cannot confirm deck condition or replace an on-site assessment.

Licensing and permit rules vary by state/city. Check the relevant licensing authority and local building department for your roof project rather than assuming every repair or replacement follows the same process. The proposal should name who obtains any required permit and coordinates inspections; ask whether related charges are included.

NRCA recommends checking liability insurance and workers’ compensation certificates for coverage through the job. Ask who supervises your roof, whether subcontractors will work there, and whom to contact if rain reaches an opened section. A manufacturer credential does not replace checking government licensing requirements.

Put roof-specific logistics in writing: driveway protection, dumpster placement, protection of gutters and plants, daily debris removal, magnetic nail cleanup, and temporary weather protection. For solar panels or satellite equipment, identify who disconnects and reinstalls equipment and which work is excluded from the roofing contract.

The FTC warns against paying the full project amount upfront and recommends a written contract. Deposit rules vary by state/city, so verify local requirements before accepting a payment schedule. Do not assume a deposit percentage quoted by one roofer is a legal requirement.

Ask for milestones tied to your roofing work, such as material delivery, completion of the specified roof installation, and an agreed final walkthrough. Clarify what happens when weather postpones tear-off. The agreement should explain how decking changes are documented, approved, and added to the balance rather than leaving authorization to an on-site verbal conversation.

Before making the final payment, review the agreed punch list, cleanup, completion photographs, and warranty paperwork. Confirm the status of any required inspection. Save the signed scope and approved changes together so a later leak discussion does not depend on remembering what the salesperson promised.

Ask for the exact manufacturer warranty and the contractor’s separate workmanship terms. GAF’s published warranty comparison shows that eligibility and coverage differ by warranty selection, qualifying accessories, and installer credentials. Do not interpret the word lifetime as a promise that every leak or installation error is covered.

Request the actual documents before signing. Ask who handles registration if required, what proof you receive, who takes the first leak call, and which exclusions or transfer conditions apply. For a localized repair, get a clear description of the repaired area covered by the roofer’s promise and the roof conditions outside it.