The Gambrel Roof Surface Area calculator computes the total surface area of a gambrel roof, and the number of 4x8s and bundle of shingles needed for a roof based on the dimensions below.
INSTRUCTIONS: Choose units and enter the following:
Gambrel Roof Area (A): The calculator returns the:
The Roofing Shingles Cost Survey list the observed price of a bundle of shingles. A bundle is equal to roughly (33 1/3 ft2) or one third of a roofing square (100 ft2). The shingle price survey includes a date, the name of the store, and the five price points for shingles: economy, low, median, high and premium. 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:
All prices are for one bundle of shingles which cover 33.33 ft2.