Roofing Estimate Template: Squares, Line Items and Sample

After a hailstorm, a homeowner may collect three or four roofing bids in a week. The roofing estimate template that wins is usually the one that answers the questions a careful owner, and their insurance adjuster, will ask: how many squares, how many layers come off, what underlayment, what happens if the decking is rotten, and what the warranty covers. Line items and measurements do that far better than a single lump sum.

Below you will find the measurement math, the line items a full replacement estimate needs, a filled-in sample, notes on insurance work and the terms that protect both you and the owner.

What a roofing estimate needs to show

A roofing estimate is a priced scope of work for repair or replacement. For replacements it typically covers:

• Measurements: roof area in squares (1 square = 100 sq ft), pitch, number of facets, length of ridges, hips, valleys, eaves and rakes.
• Existing roof: material and number of layers to remove.
• New system: underlayment, ice and water barrier, drip edge, starter, field shingles or panels, ridge cap, flashing, ventilation.
• Allowances: decking replacement, unforeseen rot.
• Site costs: permits, dumpster, disposal fees, landscape protection, magnetic nail sweep.
• Commercial terms: deposit, progress or completion payment, warranty, validity.

Larger commercial roofs are often priced from a full bill of quantities; for residential work a line-item estimate like the sample below is usually enough.

Roof measurement math

Start from the footprint (or from aerial measurement reports) and convert to roof surface area.

1. Footprint including overhangs: 50 ft x 32 ft = 1,600 sq ft for a simple gable house.
2. Apply the pitch factor: a 6/12 pitch has a factor of about 1.118, so 1,600 x 1.118 = 1,788.8 sq ft.
3. Convert to squares: 1,788.8 / 100 = 17.89 squares.
4. Add waste: a simple gable might need around 10%: 17.89 x 1.10 = 19.68, so order 20 squares. Complex roofs with many hips and valleys need more.

Common pitch factors: 4/12 = 1.054, 6/12 = 1.118, 8/12 = 1.202, 10/12 = 1.302, 12/12 = 1.414. These come from basic geometry (the length of the rafter compared with its horizontal run), so you can calculate any other pitch the same way.

Roofing estimate line items

Line item	Unit	Notes
Tear-off existing shingles	Per square, per layer	Second layer priced extra
Disposal / dumpster	Each or per load	Include landfill fees
Decking replacement	Per 4 x 8 sheet	Allowance; actual sheets billed
Synthetic underlayment	Per square
Ice and water shield	Per linear ft or roll	Eaves and valleys where code or climate requires
Drip edge	Per linear ft	Eaves and rakes
Starter strip	Per linear ft
Shingles (product, colour)	Per square	Name the line, e.g. architectural laminate
Ridge cap and ridge vent	Per linear ft
Flashing (step, chimney, pipe boots)	Each / per linear ft	Replace vs reuse stated
Steep-slope / high-roof charge	Per square	If pitch or height requires
Permit	Each	As charged by the local authority

Roofing estimate sample

Summit Roofing Co. - Estimate R-2026-0457 | 12 Nov 2026 | Valid until 12 Dec 2026
Owner: Angela Ruiz | Site: 910 Hillcrest Dr | Roof: gable, 6/12, 17.9 sq measured, 20 sq ordered incl. waste, 1 existing layer
Description	Qty	Unit price	Amount
Tear-off and haul away, 1 layer asphalt shingles	18 sq	$75.00	$1,350.00
Dumpster and disposal fees	1	$475.00	$475.00
Synthetic underlayment	18 sq	$28.00	$504.00
Ice and water shield, eaves and valleys	200 lin ft	$3.25	$650.00
Drip edge, eaves and rakes	196 lin ft	$3.00	$588.00
Architectural shingles, installed (colour: Weathered Wood)	20 sq	$310.00	$6,200.00
Ridge vent and ridge cap	50 lin ft	$9.00	$450.00
New pipe boots	3	$45.00	$135.00
Permit (as charged)	1	$180.00	$180.00
Total			$10,532.00
Decking: replaced only if damaged, at $85 per 4 x 8 sheet installed, billed on actual quantity with photos. Payment: 30% ($3,159.60) on signing, balance on completion. Warranty: manufacturer's material warranty plus our 5-year workmanship warranty.

Math check: 1,350 + 475 + 504 + 650 + 588 + 6,200 + 450 + 135 + 180 = 10,532. Thirty percent is 3,159.60. Note that tear-off is priced on measured squares (18) while shingles are priced on ordered squares including waste (20); say this on the estimate so the owner understands why the quantities differ.

Metal, tile and flat roof variations

The same template works for other roof types, but the line items change:

• Standing seam metal: priced per square or per panel linear foot, with lines for underlayment rated for metal, panel profile and gauge, trim (eave, rake, ridge, valley), clips and fasteners, and pipe flashings designed for metal. Note the panel colour and finish warranty.
• Tile and slate: heavy materials may need a structural check; add battens, underlayment, broken tile replacement allowance and the cost of salvaging tiles for reuse if that is planned.
• Low-slope and flat roofs: priced by square, with membrane type (for example TPO, EPDM or modified bitumen), insulation board thickness, cover board, perimeter edge metal, drains or scuppers, and any tapered insulation for drainage.

Payment schedules for roofing jobs

Most residential replacements take one to three days, so a deposit and final payment is enough. A common pattern is a deposit on signing (to order materials), with the balance due on completion and a final inspection. Larger or commercial jobs may use progress payments: for example 30% on signing, 40% when materials are delivered and tear-off is complete, and 30% on completion. Whatever you choose, show the amount of each payment on the estimate as well as the percentage, and say what triggers it. Check your state's rules on maximum deposits for home improvement contracts, since some states cap them.

Repair estimates vs replacement estimates

Small repairs (a few missing shingles, a leaking boot, flashing at a chimney) are usually priced as a minimum charge plus materials, or as a flat fee per repair. State what you will inspect, what you will fix and that hidden damage under the repair area may need further work. If the roof is near the end of its life, put a replacement option on the same document so the owner can compare.

Insurance claim estimates

For storm damage, the owner's insurer issues its own scope. Your estimate should be itemised in the same units (squares, linear feet, each) so line-by-line differences are easy to discuss. Supplements for items the adjuster missed, like drip edge or code-required ice barrier, are easier to justify with photos and quantities. Our guide on billing insurance companies as a contractor covers the paperwork, and the roofing invoice template shows how to bill claims and deductibles. Never offer to waive or absorb the homeowner's deductible; several states treat that as insurance fraud.

Door-to-door sales and the right to cancel

Roofing jobs are often sold at the customer's home. Under the FTC Cooling-Off Rule, many sales of $25 or more made at the buyer's home can be cancelled within three business days, and the seller must give the buyer a notice of that right. Many states add their own home-solicitation and post-disaster contractor rules, so check yours. This is general information, not legal advice.

Terms for roofing estimates

• Decking and hidden damage at a stated unit price.
• Weather: start date subject to dry conditions.
• Property protection: tarps on landscaping, nail sweep of the yard and driveway.
• Gutters, skylights and solar panels: state whether removal and reinstallation is included.
• Warranty: separate manufacturer and workmanship terms; our workmanship warranty template helps you write yours.
• Lien rights: some states require pre-lien notices on residential contracts; check local rules.

Common mistakes

• Quoting "replace roof, $10,500" with no quantities, which makes insurance supplements and disputes much harder.
• Forgetting the second layer, then finding it on tear-off day.
• No decking unit price.
• Waste factor too low on cut-up roofs.
• Letting estimates sit for months while shingle prices change; set a firm expiry.

For large or commercial jobs, a fuller construction quotation format or a formal bid proposal may be expected instead.

Create your roofing estimate

Open our free invoice generator, title the document "Estimate", enter each roofing line with its quantity and unit price, and add the decking allowance and warranty in the notes. Download it as a PDF to send to the homeowner, with no sign-up required, and reuse the same lines for the final invoice when the job is complete.