Craft Quantities
Plan & Takeoffs

Quote check

Check an asphalt shingle roof quote

Paste the quote you were given and enter your measurements. Every line is read against the job: what the quote leaves out, what it adds, which quantities sit outside the computed range, and what to ask. Quantities only — never prices.
  • 5Lines the job needs
  • 9Measurements
  • QuestionsNever a verdict

How the quote is read

Each line of an asphalt shingle roof quote is matched to the line of the job it names, or marked as something the Asphalt shingle roof takeoff does not measure — labour, removal, hire, fees, or anything else.

The job’s own figures come from 9 measurements — footprint length, footprint width, roof pitch (rise per 12), slope factor, ridge length, eaves with ice-dam membrane, eave overhang, exterior wall thickness, ice-dam reach past the wall's inside face — run through the same calculators as the takeoff, so the two give the same figure for the same job.

Reading an asphalt shingle roof quote

Shingle roofs are quoted by the square. The squares here carry a cutting allowance for a plain gable, with the ridge cap and starter strip as lines of their own, so a quote whose squares also cover starters, caps, hips or valleys will run higher.

The ice-dam membrane and the ridge are the lines that vary most between roofers. A ridge vent is fitted under the ridge cap, not instead of it, so a quote with a vent and no cap has either folded the cap into the squares or left it out. Tear-off and disposal of the old roof is often priced on its own.

Three steps

  1. Give your measurements. The page opens on a typical job so it has something to show.
  2. Paste the quote's lines as they came, or add them one at a time. Leave the prices in — they are taken out, never read.
  3. Read the report: what is left out, what is added, what sits outside the range, and one list of questions to send.

Your quote

The asphalt shingle roof quote you were given

Paste from an email, or open or drop a PDF, Excel, CSV or text file, or a photo of the quote. Amounts of money are taken out before anything is read — this page compares quantities, never prices.

Nothing you paste or open leaves this device.

or one the job needs:

The reading

What the quote says, against the job

Asphalt shingle roof · Footprint length 39 ft · Footprint width 26 ft · Roof pitch (rise per 12) 6 · Slope factor 1.12 · Ridge length 39 ft · Eaves with ice-dam membrane 2 · Eave overhang 16 in · Exterior wall thickness 6 in · Ice-dam reach past the wall's inside face 2 ftFootprint length 12 m · Footprint width 8 m · Roof pitch (rise per 12) 6 · Slope factor 1.12 · Ridge length 12 m · Eaves with ice-dam membrane 2 · Eave overhang 0.4 m · Exterior wall thickness 0.15 m · Ice-dam reach past the wall's inside face 0.61 m

  • What it leaves out

    Every line the job needs that nothing on the quote reads as, with the quantity your measurements produce.

  • What it adds

    Lines this job's takeoff does not measure — labour, removal, hire, fees, anything else — each named for what it is.

  • What sits outside the range

    Quantities above or below the computed range, by how much, in the quote's unit or converted and shown.

  • What to ask

    One list of questions, in the quote's order, ready to copy and send. Questions, never a verdict.

Paste the quote above, or add its lines one at a time. The reading appears here as each line is read.

Outside what this takeoff measures

5

Nothing in the reading measures these. Whether the quote covers each is worth asking in its own right: a scope missing from a quote tends to become a cost after work has started. Why each is left out is on the takeoff.

  • The deck below, its condition and any repair to it
  • Valleys, hips, step flashing, chimneys, pipe boots and every other penetration
  • Drip edge, starter strip (the shingle row's allowance covers cutting only) and hip and ridge accessories other than the cap counted here
  • Intake ventilation at the soffit, which a ridge vent needs and without which it can pull air from the house
  • Tear-off, disposal and whatever the deck turns out to need

The reference

Every line the reading looks for

For Footprint length 39 ft · Footprint width 26 ft · Roof pitch (rise per 12) 6 · Slope factor 1.12 · Ridge length 39 ft · Eaves with ice-dam membrane 2 · Eave overhang 16 in · Exterior wall thickness 6 in · Ice-dam reach past the wall's inside face 2 ftFootprint length 12 m · Footprint width 8 m · Roof pitch (rise per 12) 6 · Slope factor 1.12 · Ridge length 12 m · Eaves with ice-dam membrane 2 · Eave overhang 0.4 m · Exterior wall thickness 0.15 m · Ice-dam reach past the wall's inside face 0.61 m. Each is the calculator linked under it, run with those measurements; a range is that calculator at both ends of one choice, not a margin for error.

How the ranges are taken

Where the choice is cutting waste, the ends are the site’s own allowances: 5%, the tight buffer of a crew with a planned set-out, and 15%, the wider one a first-timer orders. Where the calculator decides between patterns or materials, the ends are the options it offers. Where it adds nothing for loss, the range runs from the net quantity to 15% over it.

A minimum — the fewest hangers a spacing allows, the least airflow a room needs — has no upper end. A single figure carries an allowance the material itself needs, such as a lap, and names it.

What a reading like this cannot see

  • It does not know your prices, your market, or what the work ought to cost.
  • It does not know the building — the access, the condition of what is there, or what has to happen first.
  • It cannot check a lump sum, because there is no quantity in one.
  • A line it reads as missing may be priced under another name. A quantity outside the range is not evidence of anything. Each is a reason to ask a question.
  • Two quotes are not comparable until their scopes are.
  • It is not advice, and it is no substitute for a second quote.

The full takeoff

Every quantity for this job, with its working

The Asphalt shingle roof takeoff runs the same calculators on the same measurements and shows what sits under each line here.

Open the takeoffEvery quote check

  • Base, allowance, order

    Each line's quantity before and after its allowance, and what to buy.

  • Every allowance editable

    Change a waste figure and the order follows, with its source named.

  • Into a project

    Add the whole job to a workspace with your own prices.

Frequently asked questions

What quantities does an asphalt shingle roof job need?
It depends on the measurements, so this page asks for yours. At the size it opens on — Footprint length 12 m · Footprint width 8 m · Roof pitch (rise per 12) 6 · Slope factor 1.12 · Ridge length 12 m · Eaves with ice-dam membrane 2 · Eave overhang 0.4 m · Exterior wall thickness 0.15 m · Ice-dam reach past the wall's inside face 0.61 m — the lines come to: Roofing Shingle, 113–123 m²; Roofing Underlayment, 1 roll; Roof Eave Ice Dam Protection Membrane Footprint, 31.1–35.8 m²; Roof Ridge Cap, 2 bundles; Ridge Vent Linear Footage, 12.6–13.8 m. In imperial units — Footprint length 39 ft · Footprint width 26 ft · Roof pitch (rise per 12) 6 · Slope factor 1.12 · Ridge length 39 ft · Eaves with ice-dam membrane 2 · Eave overhang 16 in · Exterior wall thickness 6 in · Ice-dam reach past the wall's inside face 2 ft — they come to: Roofing Shingle, 11.9–13 squares; Roofing Underlayment, 1 roll; Roof Eave Ice Dam Protection Membrane Footprint, 334–384 ft²; Roof Ridge Cap, 2 bundles; Ridge Vent Linear Footage, 40.9–44.8 ft.
Which line on an asphalt shingle roof quote varies the most?
The Roof Eave Ice Dam Protection Membrane Footprint: 31.1–35.8 m² for a job measured Footprint length 12 m · Footprint width 8 m · Roof pitch (rise per 12) 6 · Slope factor 1.12 · Ridge length 12 m · Eaves with ice-dam membrane 2 · Eave overhang 0.4 m · Exterior wall thickness 0.15 m · Ice-dam reach past the wall's inside face 0.61 m, depending on how much is allowed for loss over the net figure, up to 15%.
What does an asphalt shingle roof quote often leave out?
The reading names every line of the job that nothing on the quote reads as — any of the 5 lines the takeoff measures. The takeoff also lists 5 things it does not measure, shown under the reading, and each is worth asking about: a scope missing from a quote tends to become a cost after work has started.
Can I paste the quote exactly as it came?
Yes — from an email, a PDF or a spreadsheet, one item to a line. Amounts of money are taken out before anything is read, headings and totals are skipped, and each line is shown with what it was read as, so a misreading is one correction. Quantities in the other unit system are converted and the conversion is shown; a count of boxes is never compared with a count of tiles.
Does this check the price as well?
No. It reads quantities, never prices, and this site publishes none: an installed price moves with the market, the season, the access and the specification, so a figure for what the work ought to cost would give you confidence in a number nobody can defend. A quantity against your own measurements is checkable, and every figure here links to the calculator that produced it.