How do you price a roofing job?

A roof estimate isn't a guess off the curb. It's a stack: squares × material, plus labor, plus tear-off and disposal, plus underlayment and flashing, plus overhead, plus margin. Skip a layer and you eat it. Here's how experienced roofers build the number so it holds up when the dumpster shows up.

Start with the square

Roofing is sold by the square: 100 square feet, a 10×10 area. You measure the roof's actual surface, not the home's footprint, because pitch adds area: a steep roof has far more surface than the house plan suggests. Then add a waste factor, commonly 10–15% (more for cut-up roofs with lots of hips and valleys), to cover cuts, starter, and ridge.

So the first move on every job is an accurate square count, whether you walk it, use aerial measurement, or both. Every other number (material order, labor, dump fees) flows from squares. Get the count wrong and the whole estimate is wrong.

Tear-off vs overlay

An overlay lays new shingles over the existing layer. It skips tear-off labor and dump fees, so it can come in 20–40% cheaper up front. The catch: it hides a deck you can't inspect, adds weight, usually shortens the new roof's lifespan, and most codes cap a roof at two total layers.

A tear-off strips to the deck, lets you find and replace rotten sheathing, and gives the new system its full rated life. Most reputable roofers recommend a tear-off, and many will only warranty their work on one. Price the overlay only when the existing layer is single and sound, the deck is solid, and the customer clearly understands what they're trading away. Always carry a decking replacement line ("$X per sheet for any rotten plywood we find"), so a surprise under the shingles doesn't blow your margin.

Pitch, stories, and access multipliers

Two roofs with the same square count can take wildly different labor. The drivers:

• Pitch. A walkable low-to-mid pitch (up to ~6/12) runs at your base labor rate. 7/12–9/12 often adds 15–25% because crews slow down and need fall protection. 10/12 and steeper can add 25–50% or more.
• Stories. A second or third story means longer ladder hauls, more staging, and harder loading. Add for it.
• Access. Tight lots, steep landscaping, no driveway for the dumpster, power lines, and delicate ground all slow loading and cleanup. Walk the site before you quote.
• Complexity. Lots of valleys, dormers, skylights, chimneys, and penetrations mean more flashing, more cuts, and more waste.

Material tiers

Give customers a clear ladder rather than one take-it-or-leave-it number:

• 3-tab asphalt: the entry option, lowest cost, shortest warranty. Increasingly skipped in favor of architectural.
• Architectural (dimensional): the residential default: better looks, better wind ratings, longer life. This is your bread-and-butter tier.
• Designer / premium shingle: heavyweight, high-end profiles for customers buying curb appeal and longevity.
• Standing-seam metal: a different product and a different price, with a wide range by profile, gauge, and trim. Sell it on lifespan, not on shingle-style math.

And don't forget the layers between the customer and the weather: underlayment (synthetic vs felt), ice-and-water shield in valleys and eaves, drip edge, starter, ridge cap, and flashing. These are real costs; line them in, don't bury them.

Build the estimate, layer by layer

A clean roofing estimate adds up like this:

1. Material: squares × waste factor × per-square material cost (shingles, underlayment, ice-and-water, drip edge, ridge, flashing, fasteners).
2. Labor: crew rate × time, adjusted by your pitch/stories/access multipliers.
3. Tear-off & disposal: dumpster or haul-off plus tear-off labor, scaled by number of existing layers.
4. Permits & misc: permit fees, decking allowance, and any specialty flashing.
5. Overhead: your trucks, insurance, office, and warranty reserve, spread across jobs.
6. Margin: your profit, added on top, not whatever's left over.

Price from cost up. Reverse-engineering a number to beat the bid down the street is how roofers go out of business after a busy season.

What margin to target

Many roofing companies aim for a gross margin of roughly 30–50% on residential re-roofs, with net profit landing in the high single digits to mid-teens after overhead. Steep, complex, and insurance work often carries higher margins than a simple walkable ranch. The exact figure is yours to set from your costs and your market, but pick a margin deliberately and hold the line, because the cheap bid that wins the job and loses money isn't a win.

Quote it clean, close it faster

The estimate is only worth what you collect. From measurement to deposit, a tool keeps it tight. Claver for roofing lets you build a per-square pricebook, send a clear Good/Better/Best proposal with material tiers the customer can compare, collect a deposit online, and invoice the balance on completion, so the margin you priced is the margin you keep. See it on the roofing page or the feature tour.