A roof quote lives or dies in the layers you can't see from the street: the shingle grade, the underlayment underneath it, and what happens to flashing, vents, and rotten decking when the old roof comes off. Two quotes for the "same roof" often describe different material grades and different tear-off scopes — that's why the bottom-line totals don't match. Read the line items first; the total makes sense only after them.
What a roof quote should spell out: shingles, underlayment, and everything under them
- Shingle or membrane, named by brand and line. "Architectural shingle" is a category, not a product. A serious quote names the manufacturer, product line, color, and weight/class — plus ridge cap and starter course. Named materials can be looked up and compared; unnamed ones can't.
- Underlayment and ice-and-water shield, by type and location. Felt vs. synthetic underlayment, and where ice-and-water membrane goes (eaves, valleys, penetrations, low-slope areas). On a roof, underlayment is the second line of defense — the quote should say what it is and where it runs.
- Tear-off scope: layers off, disposal, and site protection. How many existing layers come off, dump/trailer terms, and how the yard, landscaping, and siding are protected — plus magnet-sweeping for nails. An overlay over old layers is a different job than a full tear-off at a similar-sounding price.
- Decking terms, before anyone finds rot. How rotten or damaged deck boards found underneath are priced (per sheet, time-and-materials, or included up to a stated amount) and how you'll be told before the work proceeds. Every old roof hides this question; the quote should answer it in advance.
- Flashing, drip edge, and every penetration — counted, not bundled. Chimneys, skylights, vents, and wall intersections listed one by one (reuse, replace, or reseal), plus drip edge metal and vent types with quantities. "Flashing: included" with no counts can't be compared against an itemized list.
- Gutters and downspouts: in or out, stated plainly. If included: material, size, guards or none, and where downspouts discharge. If excluded, the quote should say so — a roof without a gutter plan just moves the water question to later.
- Warranties split in two, plus permit and payment terms. Manufacturer warranty (the product) and workmanship warranty (the installation) are different documents with different lengths — get both in writing, with who honors each. Add who pulls the permit, start window, expected duration, and payments tied to milestones.
How to compare two roof quotes: match the layers, not the totals
Start with material identity: a named shingle line against an unnamed "architectural shingle" isn't a comparison yet — ask for the name first. Then check tear-off symmetry (full tear-off vs. overlay) and decking terms, because those two lines move labor and dump costs more than anything else. Only when underlayment, flashing counts, and gutter scope match on both sides are the totals actually competing.
Roof warning signs: storm-chasers, warranty traps, and sight-unseen promises
Roofing has its own classic traps. None of these proves anything about a specific contractor — they're the patterns worth a second look:
1.The storm-chaser close
A door-knocker after a storm pressing for a signature today, a large deposit upfront, or signing over insurance paperwork before any scope is written. Urgency plus vagueness is the combination to resist — a real scope can wait a day for you to read it.
2.'Lifetime warranty' with no split
A warranty promised as one word — 'lifetime' — without saying whose warranty (manufacturer vs. installer), how long each lasts, what's excluded, and who you call. Ask for both documents by name.
3.Overlay or firm price over unseen decking
A fixed total with no decking terms on an older roof, or an overlay proposed without stating how many layers are already up there. The wood underneath is the unknown on every re-roof; a quote that pretends it isn't is guessing.
4.Flashing and ventilation as one lump
'Flashing included' or 'ventilation to code' with no counts, locations, or vent types. Chimneys, valleys, and skylights are where roofs fail — the lines that matter most shouldn't be the vaguest ones.
Your roof is a system, not a shingle
The shingle brand is the least of it — the underlayment, flashing details, ventilation, and decking terms decide whether your roof lasts. A licensed contractor will review YOUR roof quote line by line: what the scope actually covers, the red flags in it, a fair price range for your job, and what to do next — for one flat fee. This guide teaches you the layers; the opinion tells you what they mean on your house.
Get your written second opinion — $75 flat