Asphalt Shingle Price Changes: A Reroof Cost Scenario

Scoped correction — October 27, 2026: removed the claim that an assumed wage multiplier can identify a padded bid. The earlier asserted BLS wage observations and September 2026 index levels have not been independently confirmed; they are not reported here as verified current data. The arithmetic below uses explicitly hypothetical inputs. The original publication and verification dates are retained, not renewed by this correction.

A material-price increase affects only the materials portion of a roofing budget when other inputs stay unchanged. In the hypothetical example below, a 25-square roof has $8,750 of materials and $4,996.88 of modeled labor. If $350 per square is the new material price after an assumed 2.7% increase, the increase from the modeled prior price is about $230. That is a sensitivity calculation, not a current US price estimate or a quote.

What are the inputs?

This site has not inspected the roof or collected contractor bids. A square means 100 square feet of roof surface; it is not the house’s floor area.

Input	Hypothetical value	How to replace it
Roof area	25 squares	Measured roof report and quote scope
Worker wage input	$26.65 per hour	A documented relevant wage input, if using this model
Wage multiplier	2.5, with sensitivity from 2 to 3	Your own explicit scenario; not an observed contractor norm
Labor	3 worker-hours per square	Contractor’s stated work assumptions, if supplied
Materials	$350 per square	Supplier or itemized contractor price for specified products
Material-price increase	2.7%	A documented comparable product-price change

The $26.65 input is retained solely to make the earlier arithmetic reproducible. It is not identified as a verified current BLS median. The 2–3 multiplier is arbitrary scenario input, not an established fair-price range. It combines assumed non-wage costs and margin without measuring them.

BLS’s roofer occupation profile is an official starting point for occupational information. The wage series previously cited and roofing-product PPI series need their observation period, values and release details checked before being used as current inputs. A producer index is not a retail dollar price or a contractor quote.

How does the arithmetic work?

Worker-hours: 25 × 3 = 75.
Hypothetical wages: 75 × $26.65 = $1,998.75.
Modeled labor line: $1,998.75 × 2.5 = $4,996.875.
Materials: 25 × $350 = $8,750.
Scenario total: $13,746.875, rounded to $13,747.

Roof squares	Worker-hours	Modeled labor	Materials	Scenario total
15	45	$2,998	$5,250	$8,248
20	60	$3,998	$7,000	$10,998
25	75	$4,997	$8,750	$13,747
30	90	$5,996	$10,500	$16,496
35	105	$6,996	$12,250	$19,246
40	120	$7,995	$14,000	$21,995

These are model outputs, not surveyed averages, minimum acceptable bids or maximum reasonable prices. Permits, disposal, decking repairs and other exclusions below are not priced.

How much would a 2.7% material increase add?

If $350 is the price after the hypothetical increase, the old price is $350 ÷ 1.027 ≈ $340.80. For 25 squares, the difference is approximately $230.04, or 1.67% of the new modeled total.

If instead $350 is the price before the increase, the added amount is $350 × 2.7% × 25 = $236.25. State which baseline you use. Neither calculation establishes that market prices actually changed by 2.7%.

If only shingles change price while flashing and other materials stay unchanged, apply the change only to the shingle portion. Full pass-through across all materials is a modeling choice, not a guaranteed upper bound on actual quote changes.

How sensitive is this to hours and the multiplier?

Holding the hypothetical wage at $26.65 and materials at $8,750:

Worker-hours for 25 squares	Multiplier 2	Multiplier 2.5	Multiplier 3
50	$11,415	$12,081	$12,748
75	$12,748	$13,747	$14,746
100	$14,080	$15,413	$16,745

The endpoints differ by $5,330 because we deliberately changed assumptions. This does not measure the market’s actual price distribution. A bid outside the table is not evidence of overcharging or underpricing.

What material change would explain a larger quote?

Under the same hypothetical baseline, prior materials are about $8,519.96. An additional $1,000 attributed entirely to materials would imply about 11.74% growth in that materials subtotal. This reverse calculation is useful only if area, product specification, labor and all other scope are unchanged. It cannot identify the cause of a real quote difference.

Ask which quantities, products, work items or terms changed. Avoid attributing a total-price change to an index without a like-for-like breakdown.

How should I compare actual quotes?

Request comparable written scopes from contractors. Some quote fixed project prices and will not disclose internal labor assumptions; that alone does not establish an unjustified bid.

Compare the same item	What to request
Roof measurement	Surface area, pitch and waste allowance
Removal	Existing layers, tear-off and disposal included
New materials	Shingle brand and line, underlayment, flashing and ventilation
Decking	Included allowance and unit price for additional replacement
Site and permit	Access constraints, protection, cleanup and permit responsibility
Warranty	Product and workmanship terms and exclusions
Price and changes	Quote validity, payment schedule and written change-order terms

If a quote gives worker-hours and a labor subtotal, dividing them yields an implied rate. For example, $9,000 ÷ 75 hours = $120 per worker-hour. That number alone says nothing about fairness: the subtotal may include overhead, equipment, disposal or other work. Ask what is included before comparing it with another quote. Do not use the hypothetical 2–3 multiplier as an approval or rejection threshold.

Compare the materials subtotal with a current price for the same specified products and quantities. The $350 allowance above is not a substitute for that price. Differences in contractor purchasing, delivery and warranty obligations may remain.

What is outside this model?

Steep pitch, multiple stories, several tear-off layers, decking replacement, complex flashing, difficult access, permits, disposal, emergency scheduling, financing, gutters and warranty scope can change the work and price. No dollar allowances for them were researched here. Local labor and material markets were not measured, so the table cannot compare cities.

Before signing

Match product specifications, area and included work across quotes.
Record decking replacement and other variable work prices.
Confirm who handles permits and disposal.
Clarify what each subtotal includes instead of judging it by an assumed wage multiple.
Record quote expiration and the written change-order process.
Check licensing and insurance requirements with the relevant state or local authority.

Use the model to understand which assumptions matter. Use documented local scopes and quotes to compare your actual project.