The Shingles for a Roof calculator computes the number of shingle bundles (33.33 ft² each) needed to cover a common gabled roof based on the roof dimensions.
INSTRUCTIONS: Choose units and enter the following:
- (L) Ridge Length
- (S) Roof Span
- (P) Pitch of Roof (choose:1/12, 2/12, 3/12, 4/12, 5/12, 6/12, 7/12, 8/12, 9/12, 10/12, 12/12, 14/12)
- (oH) Overhang
- (SBC) Shingle Bundle Coverage (33.3 ft2 for 3-Tab and 32.8 ft2 for architectural)
Shingle Bundles (B): The calculator returns the following:
- Number of bundles of shingles needed to cover roof area
- Underlayment total surface area
- Linear Feet of Ridge Cap
- Linear Feet of Starter Roll (eaves and rakes)
- number of roofing nails for normal wind conditions
- number of roofing nails for high-wind conditions.
The Math / Science
The Shingles for a Roof calculator:
- Computes the surface area of the roof.
- Adds area (+ 6") for the double layer of shingles on the first row of both sides of the roof.
- Divides the surface area by the area coverage of one bundle of shingles (33.33 ft2 for 3-tab or 32.8 ft2 for architectural)
The Ridge Shingles are calculate as the Ridge Length divided by 25 linear feet for a bundle of Ridge Cap Roofing Shingles
The Roofing Starter is calculated as twice the ridge length for both eaves plus then calculated length of both rakes (sloped sides).
Single Price Survey Data
One should use the pricing for roofing materials that can be bought locally. However, the following prices are for different quality grades of shingles in the United States. The 3 Tab and Architectural Shingles Cost Survey lists the observed price of a bundle of shingles. A bundle of shingles is 33.33 ft2 for 3-tab shingles or 32.8 ft2 for architectural shingles. The survey includes a date, the name of the store. the five price points for shingles: economy, low, median, high and premium.
3 Tab and Architectural Shingles
- Shingle Price Survey Online Source : Lowes
- Shingle Price Survey Date: 12/22/22
- Cost of Premium Shingles: $90.0 USD.
- Cost of High Grade Shingles: $52.34 USD.
- Cost of Medium Grade Shingles: $43.32 USD.
- Cost of Low Grade Shingles: $37.98 USD.
- Cost of Economy Grade Shingles: $36.0 USD.
Ridge Shingle and Starter Shingle (strips):
- Price Survey Online Source : Lowes
- Price Survey Date: 12/28/22
- Cost of High Priced Ridge Shingles: $3.51 USD / ft.
- Cost of Medium Priced Ridge Shingles: $2.4 USD / ft.
- Cost of LOW Price Ridge Shingles: $1.42 USD / ft.
- Cost of High Priced Starter Shingles: $1.47 USD / ft.
- Cost of Medium Priced Starter Shingles: $0.93 USD / ft.
- Cost of LOW Grade Starter Shingles: $0.4 USD / ft.
The pricing data is gathered periodically from nationally advertised prices on the websites of DIY providers such as (Lowes and Home Depot). The data is saved in a vCalc data repository (table), and for the use of vCalc users.
NOTE: Local pricing should ALWAYS, ALWAYS, ALWAYS be used! These price points are for estimation convenience only, and there is no guarantee on the prices of the product nor of their availability at the stated price.
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