Roof Replacement Cost: A 24-Square Asphalt Tear-Off, Itemized (2026 Baseline)
A one-story ranch torn off and reroofed in architectural shingles: tear-off, decking, underlayment, flashing, ridge vent and cleanup, itemized with crew hours.
Describe it
Every line, by trade
The reroof in the Clamp app: described in plain words, then the draft at $16,173 job cost, every line grouped by trade. Sample data.
The job at a glance
One build, fully itemized, with crew hours.
| Build | Job cost | Labor | Crew hours | Materials | Illustrative selling price |
|---|---|---|---|---|---|
| A. 24-square architectural reroof | $16,173 | $9,434 | 97 to 139 h | $6,189 | $21,024 to $32,345 |
Dump fees and other costs ($550) are the same in every build and included in the job cost. Materials include allowances. Illustrative selling price is the job cost at a 30% to 100% markup; your price depends on your own overhead and profit. Labor hours are a planning range and include setup, daily cleanup and material runs; they are never a charge to the customer. Permit and inspection fees are not included; requirements vary by jurisdiction.
The build in detail
A. 24-square architectural reroof: $16,173
One layer of 3-tab comes off into a dumpster; three sheets of decking are replaced; synthetic underlayment, ice and water shield at the eaves and valley, drip edge, valley metal, ridge vent, three pipe boots and architectural shingles go on, and the yard gets a magnetic sweep. Labor is $9,434 of the $16,173 job cost, or 58.3%. It is about 97 to 139 hours of work, including setup, daily cleanup and material runs.
Labor cost by trade
Labor only. Materials, allowances and dump fees are in the line items below. Hours are person-hours at typical production from Clamp’s labor hours catalog, as a range: a planning figure, not a schedule and not a charge to the customer.
| Trade | Hours | Labor cost | Low-Overhead×1.30 | Established×1.50 | Full-Service×2.00 |
|---|---|---|---|---|---|
| Demo & Prep | 8 to 18 h | $640 | $832 | $960 | $1,280 |
| Carpentry | 1 to 5 h | $216 | $281 | $324 | $432 |
| Roofing | 68 to 105 h | $8,578 | $11,151 | $12,867 | $17,156 |
| Setup, cleanup and material runs | 7 to 24 h | in the prices | |||
| All labor | 97 to 139 h | $9,434 | $12,264 | $14,151 | $18,868 |
Every line item
Labor $9,434 + materials and allowances $6,189 + dump fees and other $550 = $16,173 direct job cost. Hours are person-hours at typical production, on labor rows only, and the direct-cost row adds about 15% for setup, daily cleanup and material runs; an allowance or material row names the labor line that installs it, and a subcontract row has none, because the sub’s price includes their own time. Some labor quantities include a difficulty factor, so they can exceed the measured area; each row’s derivation is in the downloadable data.
| Item | Qty | Unit | Hours | Labor | Material | Line cost |
|---|---|---|---|---|---|---|
| Demo & Prep | ||||||
| Dumpster Rental Weekly | 1 | week | $0 | $0 | $550 | |
| Site Protection Setup Labor | 1.6 | day | 8 to 18 h | $640 | $0 | $640 |
| Demo & Prep subtotal | 8 to 18 h | $1,190 | ||||
| Demo & Prep subtotal | 8 to 18 h | $1,190 | ||||
| Carpentry | ||||||
| Roof Decking Replacement Labor | 96 | sf | 1 to 5 h | $216 | $0 | $216 |
| Carpentry subtotal | 1 to 5 h | $216 | ||||
| Carpentry subtotal | 1 to 5 h | $216 | ||||
| Roofing | ||||||
| Asphalt Shingle Install Labor | 24 | square | 27 to 58 h | $5,016 | $0 | $5,016 |
| Asphalt Shingle MaterialsLabor on: Asphalt Shingle Install Labor | 27.12 | square | $0 | $4,746 | $4,746 | |
| Roof Tear-Off Per Layer | 24 | square | 18 to 39 h | $1,800 | $0 | $1,800 |
| Drip Edge MaterialsLabor on: Asphalt Shingle Install Labor | 205.76 | lf | $0 | $195 | $195 | |
| Ice Water Shield Install Labor | 3.6 | sq | 1 to 4 h | $162 | $0 | $162 |
| Ice Water Shield MaterialsLabor on: Ice Water Shield Install Labor | 3.6 | sq | $0 | $342 | $342 | |
| Magnetic Nail Sweep Labor | 1 | ea | 1 to 3 h | $140 | $0 | $140 |
| Ridge Vent Install Labor | 40 | lf | 1 to 2 h | $100 | $0 | $100 |
| Ridge Vent MaterialsLabor on: Ridge Vent Install Labor | 40 | lf | $0 | $170 | $170 | |
| Roof Decking MaterialsLabor on: Roof Decking Replacement Labor | 105.6 | sf | $0 | $143 | $143 | |
| Synthetic Underlayment Install Labor | 24 | square | 4 to 10 h | $720 | $0 | $720 |
| Synthetic Underlayment Materials | 25.2 | square | $0 | $378 | $378 | |
| Valley Install Labor | 20 | lf | under 1 h | $100 | $0 | $100 |
| Valley MaterialsLabor on: Valley Install Labor | 22 | lf | $0 | $149 | $149 | |
| Vent Boot AllowanceLabor on: Vent Boot Replacement Labor | 3 | each | $0 | $66 | $66 | |
| Vent Boot Replacement Labor | 3 | each | 1 to 4 h | $540 | $0 | $540 |
| Roofing subtotal | 68 to 105 h | $14,767 | ||||
| Roofing subtotal | 68 to 105 h | $14,767 | ||||
| DIRECT JOB COST | 97 to 139 h | $16,173 | ||||
| DIRECT JOB COST | 97 to 139 h | $16,173 | ||||
Methodology & reproducibility
One reviewed snapshot for this build. The build is frozen from its own estimate run and priced by the published pricer.
Direct cost equals the sum of each row’s rounded quantity × (labor + material + other). Amounts are shown in whole dollars; every column adds to its total.
Scope selection, prose accuracy, arithmetic and provenance mapping reviewed; not independent market-rate verification.
- roof-replacement-asphalt-24sq/v1: JSON, CSV, field dictionary
Questions
Why does labor outweigh materials?
Tear-off, underlayment and shingle installation are all priced per square, and on a reroof the crew time is the larger share. The shingle material row carries waste on top of the measured 24 squares, which is why it orders more than 24.
What can push this job higher?
More than one layer to tear off, decking rot beyond the three sheets allowed, a steeper pitch that needs roof jacks or harnesses for the whole job, chimney flashing or a cricket, or a crane for delivery. Each is its own line when it is found.
Is the markup on top of this?
Yes. Direct job cost is what the reroof costs a contractor to perform. The markup table shows what it sells for at illustrative markups of 30% to 100%.
Sources & provenance
- 24-square architectural reroof reviewed snapshot Clamp Research