How to Price Roofing Jobs

The short answer: roofing prices per square, but only once the square count is right. Measure from the roof rather than the footprint, and apply the pitch and waste factors before anything else. Then build the per-square rate in layers: tear-off, underlayment, shingles, flashing and disposal. Put the decking replacement in writing as a per-sheet clause.

The roof measured 22 squares from the driveway. On the ladder it turned out to be 31. There were two layers of old shingles under the visible one, a pitch that walked like a ski slope, and a chimney, two skylights, and four valleys that the eyeball estimate had filed under "details." The quote was signed at the 22-square price. The crew worked the difference for free.

Roofing is the trade where the unit-pricing method is not in dispute (everyone prices per square, a hundred square feet of roof area). And yet roofing margins still leak everywhere, because the per-square rate is only the beginning of the price. The money is in the multipliers, the counted extras, and one paragraph about decking.

How do you get the square count right?

A per-square price multiplied by a wrong square count is a wrong price with confident formatting. Get the measurement from the roof itself, from satellite/aerial measurement tools, or from plan takeoffs on new construction, and always apply the pitch factor. A 1,600 sq ft footprint at an 8/12 pitch is not 16 squares. It is about 20, because the sloped surface is longer than its shadow. Steeper roofs hide more area than intuition allows, and the driveway estimate misses it every time.

Count these separately while you measure, because each is a priced line, not a detail:

• Ridges, hips, and valleys in linear feet. Caps, valley metal or membrane, and the slow careful work all live here.
• Penetrations: plumbing stacks, vents, exhaust hoods. Per-piece flashing prices.
• Chimneys and skylights: each is real flashing labor. A skylight is also a decision point: reflash or replace while the roof is open, and that choice belongs in the quote as an option, priced.
• Eaves protection and underlayment zones: ice-and-water shield along eaves and valleys where climate or code requires it, by the linear foot or square.
• Drip edge, ventilation upgrades, bathroom vent reroutes: counted, priced, listed.

The markup vs margin calculator converts one into the other and shows the price and profit behind both.

Build the per-square rate in layers

Your base rate per square covers tear-off of one layer, disposal, underlayment, standard architectural shingles, nails, and labor on a walkable roof with decent access. From there, multipliers and adders do the honest work:

• Pitch. Walkable (up to ~6/12) at base; 7/12 to 9/12 with a meaningful bump for harness work and slower production; 10/12 and up priced frankly steep, often 1.5x labor or more, plus staging.
• Layers. Each additional layer of tear-off adds real labor and disposal weight. Probe at the eave and count layers before quoting, not after.
• Access. A bungalow with lawn all around loads bundles a few steps from the trailer. A three-story rear slope over a glass sunroom does not. Disposal access matters too: where does the bin sit, and how far is the carry?
• Complexity. Cut-up roofs with dormers, dead valleys, and short runs produce slower than big open planes. Some estimators handle this with a complexity tier; others price the extra linear feet of detail work directly. Either works; ignoring it does not.

A worked example: full tear-off and reshingle

A story-and-a-half house, 24 squares true area at 8/12, one layer, average complexity, good access:

Beneath the table, the sentence that protects the whole job: Price includes replacement of up to 2 sheets of decking; additional decking replaced at $95 per sheet, approved before installation. More on that below, because it is the difference between roofing for profit and roofing for practice.

What eats roofing margin?

Decking priced as a surprise. Under every tear-off is decking nobody has seen for twenty years. Some percentage of it is rotten, delaminated, or was skip-sheathed for shakes and needs overlay. If your quote is silent about decking, the client believes it is included, and you will eat plywood at $95 a sheet times however many the roof demands. The fix is the allowance clause above: a small included quantity, a firm per-sheet price after it, and photos plus approval before each extra sheet goes down. It converts the worst roofing argument into routine paperwork.

Disposal weight underestimated. Tear-off is sold by area but tipped by weight, and a second layer nearly doubles it. Bin rental, overweight charges, and the extra trailer trip belong in the tear-off line. Probe for layers; price what you find.

Flashing "included" until it isn't. Chimney counterflashing ground into old brick, dead-valley membrane work, a skylight whose curb is soft: these are hours of skilled work that vanish inside a per-square rate unless counted. Itemize flashing. It also lets the client see why your quote differs from the one that plans to caulk over the old flashing and leave.

Weather and season priced at zero. Tarping a half-open roof against a surprise storm, shortened winter days, spring backlogs: roofing carries schedule risk that other trades don't. It belongs in your margin deliberately. The roofer who prices at fair-weather production rates all year is donating the shoulder seasons.

Repairs are a different product with different math

Everything above prices replacement. Repair work (the lifted flashing, the wind-torn slope, the mystery stain on the bedroom ceiling) runs on separate economics, and pricing it off your replacement rates fails in both directions.

A repair visit's costs are mostly fixed: the drive, the ladder setup, the safety gear, the walk of the roof. Whether you replace six shingles or sixty, the first hour looks the same. So repair pricing starts with a minimum charge that covers mobilization honestly: for most residential roofers, somewhere in the $350 to $600 range. Clients accept it when it is framed as what it is: getting a qualified person safely onto a roof costs a fixed amount before any repair begins.

Above the minimum, keep a short flat-rate list for the repairs that recur: pipe-boot replacement, a course of ridge cap, resealing an exposed-fastener section, a square of shingle replacement in a walkable field. For leak calls, split diagnosis from repair exactly as the service trades do: a find-the-leak fee that includes the attic inspection and hose test where needed, then a fixed price for the fix once found. Water travels; the stain's location and the entry point are routinely meters apart, and an undiagnosed "repair" is how the same client calls you back angry in the next storm.

Repairs also deserve one honesty rule in the quote: say when repair is the wrong purchase. A $700 repair on a roof with three years of life left is a fine sale. The same repair on a roof that visibly needs replacement within eighteen months should be quoted alongside the replacement number and a plain sentence about which one you would buy. Roofers fear that sentence costs them repair revenue. In practice it converts an unusual share of repair calls into replacement clients, because a homeowner who has just been talked out of spending money believes the next number you give them.

Fixed price, with structured discovery

Roofing quotes should be fixed price, always: the client is choosing among fixed numbers, and the measurable surface makes fixed pricing safe. The discovery risk that argues for time-and-materials in other trades is handled in roofing by pre-priced contingencies instead:

• Decking at a stated per-sheet price beyond the included allowance.
• Rotten fascia or sub-fascia at a stated per-foot price.
• Chimney rebuild-versus-reflash quoted separately if the probe looks bad.
• Structural surprises (sagging ridge, cracked rafters) as a stop-work-and-quote moment.

Time-and-materials has almost no place on a residential roof except genuine leak investigation on a roof you did not install, and even that converts to a fixed repair quote the moment the cause is found.

"If we open it up and find bad wood, here's exactly what happens: I photograph it, you get a price per sheet before we install anything, and nothing extra goes on the roof without your okay. It's in the quote."

Say that at signing. It costs nothing, it pre-authorizes the process, and it makes the mid-job phone call a formality instead of a confrontation.

Paperwork at roof speed

The decking clause only works if the approval loop is faster than the crew. A roof open to the sky cannot wait two days for someone to find the client and renegotiate; you need the photo, the priced change, and the sign-off to move in minutes.

That loop is what Zeus is built around: your per-square tiers, flashing prices, and per-sheet decking rate live in the Price Book, and the quote is assembled and signed on-site before the job books. When the tear-off exposes four bad sheets, you photograph them onto the job and raise the extra as a second quote off the same per-sheet rate. It is signed on your phone or from a link the client opens at work, while the crew keeps moving on the sound sections. There is no separate change-order screen in it; the quote you already know how to build is the mechanism. The final invoice then matches a paper trail the client watched being built.

Frequently asked questions

Should I quote from aerial measurement reports without visiting the roof?

Measure remotely, price after presence. Aerial reports give excellent geometry (area, pitch, ridges, valleys), but they cannot count layers, probe decking at the eaves, assess flashing condition, or see access. Use the report for the takeoff and visit before the number becomes a signature.

How many quote options should I give a homeowner?

Two, occasionally three: the standard architectural-shingle roof and one meaningful upgrade (better shingle line, ventilation improvement, skylight replacement while open). Roofing is a distress-adjacent purchase; a long menu delays a decision that mostly needs confidence.

What deposit is reasonable on a roofing contract?

Enough to cover materials, commonly 20 to 40 percent depending on your market's norms and local rules on deposits, with the balance due on completion. Materials for an $18,000 roof are real exposure; a deposit that covers the shingle order is a fair ask no serious client refuses.

Do I warranty the whole roof or just my workmanship?

Two separate warranties, stated separately: the manufacturer warrants the shingles; you warrant the workmanship for a stated term. Put both in writing in the quote. Vague "fully guaranteed" language costs you every ambiguous callback for a decade, including the ones the squirrels caused.