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How do you calculate roof area on plan?

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.)

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Calculate the square Meters of a roof

Multiply the length by the width to find the area of rectangular sections.
  1. If a section is 120 feet (37 m) x 100 feet (30 m), its total square footage would be 12,000 square feet (1,100 m2).
  2. Be sure to find the area of any dormers on your roof, as well.

Estimate roofing

To estimate how many shingles you’ll need, first estimate the total square footage of your roof’s surface. To do this, measure the length and width of each plane on the roof, including dormers. Then, multiply length x width to get the square footage of each plane.
 

Most common roof pitch

The most commonly used roof pitches fall in a range between 4/12 and 9/12. Pitches lower than 4/12 have a slight angle, and they are defined as low-slope roofsPitches of less than 2/12 are considered flat roofs, even though they may be very slightly angled.

What is the average price to tear off and replace a roof?

On average, it costs from $1.20-$4 per square foot to tear off and replace a roof with asphalt shingles. For a 1,700-2,100 square foot ranch-style property, that costs about $1,700-$8,400. However, roof replacement costs increase when you use higher-end roofing materials.

Is the square footage of a house the same as the roof?

Depending on where the information is coming from is going to determine the basis on which the estimated roof footage is calculated. The roof square footage is what we (roofing contractor) need to calculate a budget quote to do the job.

How many squares is a 1000 sq ft roof?

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Conversions Table
10 Square Feet to Roofing Squares = 0.1800 Square Feet to Roofing Squares = 8
20 Square Feet to Roofing Squares = 0.2900 Square Feet to Roofing Squares = 9
30 Square Feet to Roofing Squares = 0.31,000 Square Feet to Roofing Squares = 10
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