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Estimating / RoofSnap guide

How to compare roof replacement estimates

Compare roof replacement estimates using the same roof sections, measured surface area, waste allowance and product specifications. Then compare tear-off, decking allowances, flashing, ventilation, labor, disposal and exclusions. A lower total is not necessarily a better value if it leaves work out.

By RoofSnap · Updated

Do the estimates cover the same roof?

Start with the address and a list of included structures: the main house, garage, porch and additions. Ask each contractor to distinguish measured roof area from extra material for cutting and layout. A roofing square means 100 square feet of roof surface, not house floor space.

If two quotes show different square counts, ask whether the difference comes from roof sections, slope correction or waste. Do not compare a waste-adjusted order quantity against another contractor’s measured area. A satellite measurement PDF can provide a common starting worksheet, but uncertain dimensions still need verification.

Compare products, not just “new shingles”

Ask for the manufacturer, product line and the proposed underlayment, starter and ridge cap. Record flashing and ventilation work separately. Similar-looking products can have different installation requirements and package coverage; use the actual product instructions rather than assuming all bundles cover the same area.

Clarify whether existing flashing is replaced or reused, which penetrations are included, and how valleys and wall junctions will be treated. These details can explain a price difference that a square count alone cannot.

Separate known work from hidden-condition allowances

Look for removal of existing roofing, disposal, site protection and cleanup. Confirm how existing layers are handled. Ask how the contractor prices decking replacement discovered after tear-off, and how additional work is documented and approved.

A satellite roof report cannot establish the condition of concealed decking, current leaks or the number of roofing layers. Do not turn a measurement into a claim that hidden repairs are unnecessary. A clear allowance or change-order process makes the remaining uncertainty visible.

Check local requirements and contract terms

Ask who handles permits when required and which jurisdiction governs the project. For work in Pasco, Kennewick, Richland or Spokane, check with the relevant building department rather than assuming the same requirements apply to every address.

Compare scheduling, payment terms, workmanship coverage and manufacturer warranty conditions. Confirm the contractor’s registration or license where required and get the agreed scope in writing. This guide does not set local installation or legal requirements.

What does the $6.99 RoofSnap report buy?

The $6.99 price is for one RoofSnap measurement report, not a roof replacement quote or inspection. The report supplies roof geometry for planning where Google Solar data is available. It does not include a contractor’s labor, tax, disposal or installed material pricing.

On a saved RoofSnap report, editable material starting prices are illustrative estimates—not supplier quotes. Update them using the actual supplier’s prices before approving the material list. A materials subtotal is still not the full installed roof price.

Sources & further reading

Product details reflect RoofSnap’s current measurement and report workflow. Geometry examples are rounded illustrations, not measurements of the pictured property.

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