What should a real roofing estimate spell out?

Key takeaway

A good estimate is specific. It names the system, includes a permit line, accounts for deck repair, separates workmanship warranty from manufacturer warranty, and lists what’s excluded. Vague is a warning sign.

Exploded cross-section of a roof system showing four layers: structural deck, secondary water barrier, underlayment, and roof covering.
What a real estimate is pricing: four layers, only one of them visible. Open full size

Look for these line items. A serious estimate has most or all of them. A bid that names the tile but says nothing about the underlayment is a bid you have to read twice.

  • Tear-off scope — full removal to the deck (required in the HVHZ), and disposal.
  • Deck repair allowance — a stated rate for replacing rotten sheathing found during tear-off, so a surprise doesn’t become a surprise bill.
  • The underlayment / water-barrier system, named. For tile, that should be the two-ply self-adhered system — not just “felt.”
  • The covering, by manufacturer and product. “Shingles” isn’t enough; which shingle?
  • Fastening and flashing details — the wind-rated nailing and new flashing/edge metal, not reused flashing.
  • Product approval — reference to NOA or Florida Product Approval for the system.
  • Low-slope sections listed separately — a flat section is its own system with its own approval; a flat roofing contractor in Miami should name it (modified bitumen, TPO or BUR), not fold it into the shingle line.
  • Permit and inspections — a line confirming the job is permitted and will pass the staged inspections.
  • Warranties — clearly separating the contractor’s workmanship warranty from the manufacturer’s material warranty.
  • Exclusions and allowances — what’s not included.
  • Payment schedule — reasonable, milestone-based; not a huge up-front demand.

What are the two different roofing warranties?

People conflate these, and contractors sometimes blur them on purpose:

  • The manufacturer warranty covers the materials — the shingles, tile, or panels. It’s only as good as the company behind it, and some are prorated.
  • The workmanship warranty covers the installation — the labor. This is the one that protects you if the roof was put on wrong, and it’s only as good as the contractor still being in business.

A good estimate states both, in writing, with their terms. We put the workmanship-warranty term right on the proposal.

What are red flags in a roofing estimate?

Be cautious if you see:

  • Vague scope — “re-roof, $X” with no detail. You can’t compare it to anything.
  • No permit line, or an offer to skip the permit “to save money.” In the HVHZ, that’s skipping your inspections — your protection.
  • “We’ll just go over the existing roof.” Not legal here; full tear-off is required.
  • A large up-front deposit demanded before any work.
  • “Free roof” or deductible waiving on an insurance job — illegal in Florida.
  • No deck-repair allowance — almost guarantees a change-order surprise.
  • Pressure to sign today for a “today only” price.
RelatedHVHZ roofing requirements

How do you compare two roofing estimates fairly?

Line them up item by item, not bottom line to bottom line. If one is cheaper, find out why: a thinner underlayment, an unnamed product, no deck allowance, or a skipped permit will all make a quote look cheaper while making the roof worse. The honest cheaper bid and the corner-cutting cheaper bid look identical until you read them.

Price spreads on the same roof can be wide and still both be legitimate. A 2,000 sq ft flat roof in Miami might land near $30,000 in shingle and closer to $52,000 in standing-seam metal, same footprint, different material tier. Even within one material, bids on a single job can range from roughly $11,500 to $24,000 depending on scope. Before comparing totals, check how much plywood the bid actually replaces: a common shortcut is quoting only half a sheathing sheet per spot, leaving the rest of the deck unaddressed. Ask for the sheathing allowance in writing, in full sheets, not a percentage.

Frequently asked questions

Why is one estimate so much cheaper than another?
Usually because they’re not the same roof. A cheaper bid may use a lesser underlayment, leave out a deck-repair allowance, reuse old flashing, name no specific products, or skip the permit. Read the line items — the difference is almost always in the scope, not the contractor being generous.
Should the estimate include a permit?
For a re-roof in Miami-Dade, yes. A permit means staged inspections, which are your protection that the roof was built correctly. An estimate that omits the permit, or offers to skip it, is a red flag.
What's a reasonable deposit?
There’s no single legal figure, but be wary of demands for a large share of the total before any work or materials. Reasonable structures tie payments to milestones — for example a modest deposit, a payment at material delivery or dry-in, and the balance at completion.
Do I need the product names on the estimate?
You want them. “Tile” or “shingles” alone tells you nothing about quality or approval. A named manufacturer and product (and the underlayment system) let you verify the approval and compare apples to apples.

We write estimates to be read, not just signed: named products, a deck allowance, permit and inspections, and the warranty terms in plain sight. Compare ours to anyone’s.