Comparing roofing contractor bids in Washington, DC, Maryland, and Northern Virginia
Roofing bids can vary by thousands of dollars for the same house. Understanding what should be included and how to spot red flags helps you choose a contractor who will do the job right.
What every roofing bid should include
Scope of work: Exactly what will be done — tear-off, deck repair, underlayment, shingles, flashing, ventilation, gutters, cleanup.
Material specifications:
- Shingle manufacturer and specific product line (not just "architectural shingles")
- Underlayment type (synthetic vs. felt)
- Ice and water shield placement
- Flashing material and locations
- Ventilation products (ridge vent, box vents, etc.)
Warranty details:
- Manufacturer's material warranty (typically 25 years to lifetime)
- Workmanship warranty from the contractor (typically 5–10 years)
- What each warranty covers and what voids it
Permits and inspections: Who pulls the permit? Who schedules inspections? What jurisdictions?
Payment schedule: Never pay 100% upfront. A typical schedule:
- Deposit: 10–20% at contract signing
- Progress payment: 40–50% at material delivery
- Final payment: 30–50% after final inspection and satisfactory completion
Timeline: Start date, estimated duration, and weather contingency policy.
Insurance and licensing:
- Proof of general liability insurance
- Workers' compensation insurance
- Applicable contractor license (Virginia, Maryland, or DC)
Cleanup and disposal:
- Dumpster or dump trailer provision
- Magnet sweep for nails
- Protection of landscaping and property
Common bid discrepancies that cause problems
One bid includes tear-off; another does not: Overlaying new shingles over old is cheaper but rarely recommended. Ensure all bids assume the same approach.
Different shingle grades: "Architectural shingles" from different manufacturers vary in quality, warranty, and appearance. Compare specific products.
Missing ice and water shield: In the DMV climate, ice and water shield along eaves and in valleys is essential. Its absence may indicate a low bid that cuts corners.
No mention of deck repair: If deck boards are damaged, replacement adds cost. Bids that assume no deck repair may increase significantly after tear-off.
Vague flashing scope: Chimneys, skylights, walls, and valleys need proper flashing. Ensure the bid specifies what flashing will be replaced vs. reused.
Exclusions not listed: Some bids exclude permits, disposal, or deck repair. Read the fine print.
Red flags
- Price significantly lower than other bids (often indicates missing scope or uninsured labor)
- Pressure to sign immediately
- Request for large upfront payment
- No proof of insurance or license
- No local references or permanent address
- Verbal only — no written contract
- Vague material descriptions
DMV-specific verification steps
Virginia contractors: Verify license class (A, B, or C) through Virginia DPOR. Roofing requires a valid contractor license.
Maryland contractors: Verify MHIC license through the Maryland Department of Labor. The license number should start with a two-digit prefix.
DC contractors: Verify Basic Business License through the DC Department of Licensing and Consumer Protection.
Insurance verification: Request a certificate of insurance directly from the insurance company or agent, not from the contractor.
Local references: Ask for recent local references and drive by completed jobs if possible.
How Renovessa helps
When you request roofing quotes through Renovessa, we help organize proposals in a standardized format. We also verify that contractors have provided required license and insurance information before bid routing.