How to read a roofing quote: price per square, tear-off, line items
Roofing quotes look different from contractor to contractor, but they are built from the same parts. Learn to read the line items and convert between price formats so you can compare bids like for like.
Everything is priced by the square
Roofers price by the square — 100 sq ft of roof. A quote of "$450 per square installed" means each 100 sq ft of roof, materials and labor included, costs $450. Multiply by your square count for the total. On our 22.36-square roof, $450/square is 22.36 × $450 = $10,062, which is about $4.50 per square foot of roof. The replacement cost calculator does this on the price you were quoted — this site stores no price list, because real prices vary by region, material, roof complexity and time.
Converting between quote formats
Contractors quote in different units, which makes comparison hard until you normalize them. The conversions are simple:
- Per square to per sq ft: divide by 100. $425/square = $4.25/sq ft.
- Per sq ft to per square: multiply by 100. $4.25/sq ft = $425/square.
- Either to a total: multiply by your square count. $425/square × 24.6 squares = $10,455.
The per-square converter flips any quote into the other formats so two bids stated in different units line up for a fair comparison.
The line items to look for
A complete quote itemizes more than "shingles." Watch for:
- Tear-off and disposal: removing old shingles and hauling the debris. Priced per square or per layer — two layers is roughly double the tear-off. Estimate the debris weight with the tear-off calculator so a dumpster line item makes sense.
- Underlayment and ice-and-water: the water barrier and the edge/valley membrane in cold climates.
- Flashing: new step, valley and penetration flashing — a common corner to cut that causes leaks later. A quote that reuses old flashing is not equivalent to one that replaces it.
- Drip edge, starter and ridge cap: the edge and ridge details that finish the roof.
- Decking allowance: a per-sheet price for replacing rotten deck found after tear-off — a fair quote states this rate up front so a surprise doesn't blow the budget.
- Permit, warranty and cleanup: including a magnetic nail sweep of the yard.
A sample walk-through
Say two contractors bid your 22.36-square roof. Contractor A quotes $450/square "complete," and their scope lists tear-off of one layer, synthetic underlayment, new step and valley flashing, drip edge, ridge cap, a $75/sheet decking allowance, permit and cleanup. Contractor B quotes $400/square but the scope omits flashing ("reuse existing") and doesn't mention a decking rate. B looks $1,100 cheaper on paper, but you may pay for flashing and decking later, and reused flashing is a leak risk. Once you add the missing items, the "cheaper" bid can end up higher — and worse built.
Warranties: material vs workmanship
Two different warranties matter. The material warranty comes from the shingle manufacturer and covers product defects; some are enhanced if a certified installer uses a full system of matching components. The workmanship warranty comes from the contractor and covers installation errors — and it's only as good as the company standing behind it. Ask how long each lasts, what they cover, and whether the material warranty requires specific underlayment, starter and ridge products to be valid.
Payment schedule and deposits
How a roofer wants to be paid is as telling as the price. A reasonable schedule is a modest deposit at signing (enough to order materials), a progress payment when the material is delivered or the tear-off is done, and the balance on completion after you've inspected the work. Be cautious of anyone demanding a large share up front — a big deposit shifts all the risk to you and is a classic sign of an under-capitalized or fly-by-night operation. Never pay the full amount before the job is finished and cleaned up, and hold final payment until the nail sweep and a walk-around are complete. For insurance-claim roofs, understand what your policy pays and when, and don't sign a blank "assignment of benefits" that hands your claim to the contractor. Get the schedule, the total, and the scope in one written contract before any money changes hands. Confirm the contractor carries liability and workers' compensation insurance too, so an on-site injury or damage isn't your problem — ask for a certificate, not just a verbal assurance.
Questions to ask, and honesty
Before signing, ask for the manufacturer and product line, the underlayment type, how deck replacement is billed, the payment schedule (avoid large up-front deposits), and proof of license and insurance. Be wary of bids far below the others, same-day pressure, or no written scope. Everything here is a planning estimate to help you read and compare real written quotes — it is not a bid, and not a substitute for a licensed roofing professional. Working on a roof is dangerous; leave the install to a pro with proper fall protection.