How to Compare Roofer Quotes Line by Line

Start with a simple table

Write the items below down the left side of a page, one column per roofer. Fill in what each quote says. Where a quote is silent, write "not stated" and ask. The empty cells are where most price differences come from.

1. Shingle product

Manufacturer, product line and color. "Architectural shingles" is not a product. GAF Timberline HDZ and CertainTeed Landmark are. If one quote names a specific line and another does not, you cannot compare them, and your association will want the exact product and color anyway.

2. Tear-off and layers

Does the quote include tearing off to the deck? How many layers does it assume? On older Sterling houses, especially those from the 1960s through the 1980s, a second layer is possible. If one roofer priced one layer and another priced two, ask which is right, and what happens if the assumption is wrong.

3. Decking

Decking is the most common source of change orders, because no one can see it until tear-off. Compare how each quote handles it: is some decking included, is there a price per sheet, and will you be told before extra decking is installed? A quote that says nothing is not cheaper; it has just moved the decision to tear-off day.

4. Underlayment and leak barriers

What goes over the deck, and where? Quotes should say what underlayment is used across the roof and what extra protection goes at eaves, valleys and around penetrations.

5. Flashing

New or reused? Chimney flashing, step flashing where roof meets wall, valley treatment, skylight flashing and pipe boots. Reusing old flashing can lower a price and shorten the life of the new roof at its weakest points.

6. Ventilation and exhaust

Does the quote mention ridge vent, box vents, soffit intake and bath fan caps? If one roofer plans to add a ridge vent and fix exhaust fans that end in the attic, and another does not mention ventilation at all, they are not quoting the same job.

7. Edges and gutters

Drip edge, starter strip and how the roof meets the gutters. Are gutters being removed and reset, replaced, or left alone? Are gutter guards included?

8. Penetrations and equipment

Skylights, chimneys, satellite dishes and solar arrays. Who removes and reinstalls them, and is that in the price?

9. Permits and approvals

Who confirms whether a Loudoun County permit is needed and who pulls it? Is help with your association application included? The quote should say.

10. Cleanup and protection

Debris removal, protection of landscaping and siding, and nail cleanup in the yard and driveway.

11. Who does the work

Is the company on the quote the one doing the work, or will it be subcontracted? Check the contractor's license on the Virginia DPOR license lookup, and make sure the name on the quote matches the license.

12. Warranty and paperwork

What workmanship coverage does the contractor state in writing, and which manufacturer warranty applies to the product? Manufacturer terms depend on the product and how it is registered, so ask what you will receive at closeout.

Reading the totals

Once the table is filled in, the totals usually make sense. A low quote that leaves out decking, reuses flashing and ignores ventilation is not the same roof as a higher one that includes all three. If two quotes really do match line by line and still differ a lot, ask each roofer to explain. For context, the Roofing Roughnecks cost guide's typical Northern Virginia reference ranges are $9,000–$16,000 basic, $16,000–$28,000 mid-range and $28,000–$50,000+ high-end, each tied to a description of what drives that tier.