How Do Roofers Send Estimates? From Measurement to Signature

Short answer: Roofers send estimates fastest of any trade, because roofs get shopped in a week. Measure the roof, apply the pitch factor to convert footprint to actual area, and present the number the same visit on a retail call or by same-day PDF when the decision-maker is not home. The document shows squares after the multiplier, layers to remove, penetrations counted, a unit price per deck sheet, a 30-day expiration, and a signature line.

Two roofs of identical footprint are not the same job, and the estimate is where that gets settled or lost. A 4/12 and a 12/12 with the same outline differ by more than a third in actual surface, and every square of that difference costs material, labor, and disposal. What follows is how the number gets built, what the document has to carry, and how it gets delivered while the customer is still deciding.

What has to be measured before an estimate can be written?

Everything below moves the price, and none of it can be recovered later from memory.

Measured item	Why it changes the number
Footprint by plane	The base area before any pitch correction
Pitch, per plane	Sets the multiplier, and sets whether the crew walks it or stages it
Layers	Each existing layer is separate tear-off labor and separate disposal weight
Stories and access	Ladder height, staging, distance from the dumpster to the eave
Valleys and hips	Linear feet, and the waste factor that comes with cut shingles
Ridge and ventilation	Linear feet of ridge vent, count of box vents, intake condition
Penetrations	Pipe boots, chimneys, skylights, satellite mounts — each is flashing and labor
Drip edge and eaves	Linear feet, plus ice and water barrier where code requires it
Deck condition, visible	Soft spots, sag, prior repairs, what you can see from the attic

The attic look is the five minutes that pays for itself. Daylight through the deck, blackened sheathing, or a bathroom fan venting into the space tells you what you will find on tear-off, and it lets you write the conditional lines honestly instead of guessing.

How does the pitch factor change the number of squares?

A square is 100 ft² of actual roof surface. Footprint is not roof surface, and pricing off footprint is the most expensive arithmetic error in the trade — it can leave 5 to 40 percent of the roof unpaid.

Pitch	Multiplier	2,000 ft² footprint becomes
4/12	1.054	21.1 squares
6/12	1.118	22.4 squares
8/12	1.202	24.0 squares
12/12	1.414	28.3 squares

Same house outline, seven squares of difference between the shallow one and the steep one. That is seven squares of shingles, underlayment, tear-off labor, and dumpster weight, plus a steep-slope labor premium on top because a 12/12 needs staging and the crew moves slower on it.

Measure each plane separately and multiply each by its own pitch. Roofs with a low-slope porch attached to a steep main body get underbid constantly by anyone applying one multiplier to the whole outline. Add waste on top of the corrected area — more on a cut-up hip roof with valleys, less on a simple gable — and state the square count on the estimate so the customer can see what they are buying.

How do I price the deck replacement I cannot see yet?

As a unit price, never as a guess folded into the total. Sheathing under an old roof is unknown until the shingles are off, and the two wrong answers are pricing it high enough to lose the job and pricing it at zero and eating it.

Write it as a conditional line: replacement decking billed per sheet at a stated rate, installed, with the count documented by photograph before it is covered. Add a companion line for rotted fascia or drip edge substrate on the same basis. Then, on tear-off day, photograph every bad sheet in place with something for scale, and text the count to the homeowner before you cover it.

The same structure covers the other things you cannot see: a third layer discovered under two, a chimney that needs a new cricket, or a bathroom vent dumping into the attic. Each gets a named unit price on the estimate, so the conversation on the day is about a count rather than about a price.

How do I build the price the estimate carries?

Up from your own cost, in this sequence, and never from a per-square number overheard at the supply house.

Step	The roofing version
1. Pick the unit	Squares of actual roof area, after the pitch multiplier, per plane
2. Material from the unit	Shingles plus waste, underlayment, ice and water barrier at eaves and valleys, starter, ridge cap, drip edge, boots, nails, ridge vent by linear foot
3. Labor from the unit	Tear-off hours per layer plus install hours per square, at your loaded crew cost, with a steep-slope and multi-story premium
4. Disposal	Container size and haul count, by weight — a second layer roughly doubles it
5. Overhead	Truck, fuel, insurance, workers’ comp, permit and inspection, warranty reserve, the hours spent estimating
6. Profit	Applied as a margin, not as a markup

That last row costs more roofers money than any other line. Markup and margin are different arithmetic. A job that costs you $11,000 all-in and gets a 20 percent markup prices at $13,200, of which $2,200 is profit — a 16.7 percent margin, not 20. To actually hold 20 percent, divide the cost by 0.80 and price at $13,750. Across a season of re-roofs that gap is the difference between a truck payment and a truck.

Published per-square ranges are a sanity check and nothing else. They move with region, pitch, layer count, shingle line, dump fees, and how hard the last hailstorm hit your market. If your build-up lands far off a range you trust, find the reason inside your own numbers rather than editing the price to match somebody else’s.

Do I present the estimate in the driveway or email a PDF?

Whichever gets the decision-maker looking at it soonest.

Situation	How it goes out	Timing
Retail re-roof, both owners home	Presented on the tailgate, signed on the spot	Same visit
One owner home	Same-visit walkthrough, PDF that evening	Same day
Repair or flashing call	Written and left, or texted as a PDF	Before you leave
Insurance claim	Itemized PDF matching the carrier’s scope line for line	Within 24 hours
Property manager or commercial	PDF with a scope page and unit prices	On the bid date

Roofs are shopped in clusters. A homeowner with a leak has three roofers scheduled in five days, and the last one to send anything is competing with two documents already sitting on the kitchen counter. Same-day is not a courtesy in this trade, it is the qualifying round.

Bring the photos with you. Lifted shingles, granule loss in the gutter, a failed pipe boot, exposed nail heads on a previous repair — the pictures do more selling than the price does, because most homeowners have never seen their own roof.

How many options should a roof estimate include?

Three, differing by product and scope rather than by discount.

Option	What changes
Baseline	Architectural shingle, code-required underlayment and ice barrier, standard ridge vent
Upgrade	Heavier or longer-warranty shingle line, synthetic underlayment throughout, ridge vent upgrade
Impact-resistant	Class 4 shingle, which many carriers discount premiums for — worth naming as its own line

Keep ventilation as a separate line in every option. Intake and exhaust are a system, and a homeowner who buys a ridge vent without soffit intake got nothing for the money. Pricing it visibly is how the conversation happens at all.

What changes when the estimate is going through insurance?

The estimate stops being a sales document and becomes a comparison document. It has to line up with the carrier’s scope item by item, so anything supplemental — extra squares from a corrected pitch measurement, code-required ice barrier, a second layer, drip edge — reads as a claim line rather than an upsell.

Two rules matter before that conversation starts. In multiple states it is illegal to waive, rebate, or absorb the customer’s deductible, and Texas requires contracts of $1,000 or more involving an insurance settlement to carry a notice that the policyholder must pay it, as the state insurance department sets out in roofing and insurance: know the law. The same guidance bars a contractor from acting as a public adjuster on a claim while also doing the work. Know your own state’s version before a homeowner asks you to “make the deductible disappear,” which they will.

How long does the estimate stay good, and when do I follow up?

Put an expiration date on the page — 30 days is normal, shorter when your supplier has quoted with a dated quote or when a manufacturer price increase letter is circulating. Write it as a calendar date, not as a duration.

Follow-up runs on a short clock. Day 1, a text confirming they have the PDF and offering to walk through the photos. Day 4, a call about scheduling, because scheduling is the real question once someone has decided. Day 10, a final message that either books the slot or releases it. After a storm, compress all of that — crews are booked out in days and the honest sentence “I have two slots left this month” is both true and effective.

How do I lock in acceptance and what happens after?

Written acceptance and a deposit tied to the material order, not a round percentage pulled from the air. Check your own state first, since several cap residential down payments outright. Then the estimate stops being the live document: it becomes a signed contract, a deposit receipt, supply house tickets, dump tickets, and finally the invoice built against the same line items. Keeping all of it under one job name is what makes a dispute a two-minute conversation, and it is exactly the file described in roofing customer won’t pay.

Keel handles the after-the-signature half of that on the phone, entirely on the device: no account, no bank connection, no cloud, no login, and an App Store privacy label that reads Data Not Collected. Once the job is sold, the deposit invoice and the final invoice take about a minute each, carrying your own numbering, logo, and brand color, with the payment link rendered as a QR code the homeowner scans off your screen. Supply house tickets and dump receipts get photographed on site and read on-device by Apple Intelligence. Drives between the estimate, the job, and the yard get logged as mileage, which adds up fast in a trade that measures its week in windshield time — how to track mileage for taxes covers what that has to look like. At year end everything exports as one file, or as the Accountant Pack: a CSV plus a one-page summary PDF. The ledger is append-only and hash-chained. Free is $0 with unlimited invoices, receipts, and mileage; Keel Pro is a one-time $249.99 lifetime purchase, not a subscription. What the finished invoice itself needs is set out in what to include on an invoice.

Frequently asked questions

How fast should a roofing estimate go out after the inspection?

Same visit on a retail re-roof when both decision-makers are home, same day otherwise, and within 24 hours on an insurance job. Homeowners schedule three roofers in a week, so an estimate that arrives on day four is competing against two documents already on the counter. Repairs should be written and left before you drive off.

How do I calculate squares from a roof measurement?

Measure the footprint of each plane, then multiply by that plane’s pitch factor to get actual surface area, and divide by 100. The multiplier runs about 1.054 at 4/12, 1.118 at 6/12, 1.202 at 8/12, and 1.414 at 12/12. Pricing straight off the footprint underbids the roof by 5 to 40 percent depending on slope.

How should decking replacement appear on an estimate?

As a conditional unit price — a stated rate per sheet, installed — rather than as a guess inside the total. You cannot see the sheathing until tear-off. Photograph every bad sheet in place before it is covered and send the count to the homeowner the same day, so the discussion is about how many rather than about how much.

How long should a roofing estimate stay valid?

Thirty days is standard, written as a specific calendar date rather than a duration. Shorten it when your supplier’s quote is dated or a manufacturer price increase has been announced. An expiration lets you requote a customer who resurfaces two months later without it looking like you raised the price on them.

Should a roofing estimate include more than one option?

Two or three, separated by product and scope rather than by discount. A baseline architectural shingle, an upgraded line, and a Class 4 impact-resistant option that some carriers discount premiums for. Keep ventilation priced as its own line in every version, because exhaust without matching intake does nothing and the customer has no way of knowing that.

Can I cover the customer’s insurance deductible to win the job?

In several states, no — waiving, rebating, or absorbing a property insurance deductible is prohibited, and some states require a written notice in insurance-related contracts stating that the policyholder must pay it. Some states also bar a contractor from adjusting a claim while performing the work. Check your own state’s rules before answering that question in a driveway.

---

This article is general information, not professional or tax advice.