A roofing price is built from four groups of work:
- The field of the roof: tear-off, decking repair, underlayment and shingles, priced by area.
- The edges and lines: drip edge, starter, ice and water shield, ridge, valleys and step flashing, priced by the foot.
- The penetrations and details: pipe boots, vents, chimneys and skylights, priced by the piece.
- Setup, disposal and cleanup: protecting the landscaping, the dumpster, and the magnetic sweep.
Measure the real roof area, plus waste
A square is 100 square feet of roof surface, not of footprint. A steeper pitch adds surface area, so measure the actual roof or apply your pitch factor.
Then add waste: a simple gable needs less than a cut-up roof with hips and valleys. Enter the quantities after waste, so the shingles you order match the shingles you price.
Price each line from your own hours
These are the common lines on a roofing estimate and what each is measured in:
- Square foot (100 square feet is one square): tear-off, sheathing, underlayment and shingles.
- Linear foot: edges, ridge, flashing and gutters.
- Each: boots, chimneys, skylights and repairs.
The hours and prices are yours to set. Your crew sets its own pace, and every line's hours are editable.
| Line item | Measured in |
|---|---|
| Asphalt shingle roof tear-off and disposal | Square feet |
| Roof sheathing replacement over rafters | Square feet |
| Install synthetic roof underlayment | Square feet |
| Install ice and water shield at eaves and valleys | Linear feet |
| Install aluminum drip edge | Linear feet |
| Install starter shingle course | Linear feet |
| Install architectural asphalt shingles | Square feet |
| Install hip and ridge cap shingles | Linear feet |
| Install shingle-over ridge vent | Linear feet |
| Install metal valley flashing | Linear feet |
| Install step flashing at sidewall | Linear feet |
| Install pipe boot flashing at vent stack | Each |
| Reflash chimney with step and counterflashing | Each |
| Install fixed skylight with flashing kit | Each |
| Shingle repair patch at localized leak | Each |
| Install seamless aluminum gutter | Linear feet |
Area lines alone add up to big hours
The area lines add up quickly.
Example: The rates below are example figures; say your own records show your crew needs:
- Tear-off: 1.75 hours per square
- Synthetic underlayment: 0.75 hours per square
- Shingles: 2 hours per square
On a 24-square roof, that's 4.5 hours a square, or 108 labor hours for tear-off, underlayment and architectural shingles alone, before any edge, flashing or detail work.
That's why a per-square price that ignores the rest of the roof leaves money on it.
Your labor rate covers more than the wage
A roofer's wage isn't your labor rate. Your rate has to cover:
- workers' comp, which costs more for roofing than for most trades
- liability insurance
- fall protection and the trailer
- days lost to weather
- the hours spent measuring and bidding jobs you don't win
Then it needs a profit.
BuildWell builds the rate in three steps
- Wage: the median roofer wage for your metro.
- Overhead: your labor overhead, which starts at 100%, doubling the wage.
- Markup: your labor markup, which starts at 20%.
Example: Say your crew costs you $30 an hour per roofer. Use your real number. The 108 hours of field work on that 24-square roof come to:
- Wages: 108 × $30 = $3,240
- With 100% overhead: $6,480
- With 20% markup: $7,776 for that labor
The edges, flashing and details come on top.
Put materials, decking and disposal on their own lines
- Materials: price shingles, underlayment, ice and water shield, flashing, vents and fasteners at what they cost near the job this week, plus a markup. BuildWell starts material markup at 20%.
- Decking: add sheathing replacement as an allowance, a stated number of square feet, and put the price for anything beyond it in your terms. The homeowner knows before the tear-off what rotten decking will cost.
- Disposal and permits: price the dumpster and dump fees as their own lines. Many jurisdictions require a permit for a reroof. Add your permit fee as a line; in BuildWell, a flat permit fee is added automatically when the estimate includes permits.
Set a repair minimum that covers the trip
Price repairs from the same pieces, with a minimum that covers getting the ladder off the truck. A localized shingle repair, a pipe boot or a few feet of step flashing is quick work.
Your minimum charge should cover the trip, the setup and the time to diagnose the leak, not just the patch.







