What formula is used to calculate the pitch of a roof?
The angle, or pitch, of a roof is calculated by the number of inches it rises vertically for every 12 inches it extends horizontally. For example, a roof that rises 6 inches for every 12 inches of horizontal run has a 6-in-12 pitch.
How do you calculate the area of a sloped roof?
Determine the area protected by the sloping roof by multiplying the length of the roof by the width. The result is the area covered by the sloping roof. For example, a single sloping roof covering a house 30 feet long and 20 feet wide covers an area of 600 square feet — 30 x 20 = 600.
How do you calculate roofing?
Multiply your house length by your house width to get the area. (For example, 40 feet x 30 feet = 1,200 square feet.) Next, multiply the area by your roof’s pitch. (1,200 x 1.05 = 1,260 square feet.)
How do you work out the pitch of a rafter?
So what you need to do first is to get the pitch, using the following formula: rise / run = pitch , expressed as a percentage, meaning that: rise = run * pitch .
How do you calculate the square footage of a slope?
Take the square root of the number, and you have determined the measured side. Now that you have both the length and width, multiply them to obtain the area of the sloped surface.
How do you measure a roof for squares?
Roof surfaces are measured in “squares”. A roofing square is equal to 100 square feet of the roof. To determine the number of squares on the gable roof example in this post, divide its total of 2400 square feet by 100 (2400 ÷ 100 = 24). This means you would need 24 squares of shingles to cover that roof.
How do you convert roof pitch to degrees?
Conversion Formula for Standard Roof Pitch to Degrees
- To convert a roof slope expressed as “X-in-12″ to a roof slope expressed in degrees, find the arctangent of (rise/run).
- Divide the rise (that’s the “X”, yours will vary) by the run (always 12).
- Using a scientific calculator, find the arctangent of the result.