Nominal Roof Size (in sq. ft.)
Roof Pitch

Tips on Measuring for Roofing

To accurately calculate the area of your roof, you must first determine its slope, or pitch. Roof pitches are described in terms of rise and run. The run is the distance from the outside edge of a perimeter stud wall to the center of the house. The rise is the distance from the top of a stud wall to the peak of the roof.

A roof’s pitch is determined by how much it rises for every foot it runs. Thus, a moderate 6 in 12 roof pitch means the roof rises 6 inches for every 12 horizontal inches it runs. A 12 in 12 pitch is a steep, 45-degree angle roof.


  1. William McKleroy, July 7:

    I am roofing the house trailer and need to know how many packs of shingles needed,

  2. Cecil Venturella, March 3:

    1square of roofing covers 100 square feet of roof a bundle is 1/3 of a square. Get the square footage of roof and divide it by 100 and it will give the number of squares you need and for every decimal number over 3 buy a bundle to achieve the amount of material. Hope it helps

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