Calculation Roof Area Formula

Given pitch and a horizontal area measurement multiply the horizontal area by a correction factor corresponding to pitch provided in the table below to determine the actual area of the roof to be used in the roofing material calculator.

Calculation roof area formula.

Roof slope pitch rise run area calculation methods. L 30 feet h 12 feet 30 12 2 180 square feet. Calculating the area true once you have your roof s pitch divide the number by 12. Dividing by 12 gives the ratio of inches in rise per distance.

For example if your roof s pitch is 4 in 12 you would divide 4 by 12. The roof slope height is 6 98m. Here is the online hip roof area calculator which helps you calculate the hip roof parameters such as roof rise common and hip rafters length and roof area based on width height of roof base and the roof pitch identical for all sides. Thus a moderate 6 in 12 roof pitch means that the roof rises 6 inches vertically for every 12 horizontal inches it runs.

If your number is 1 3 squared would yield 1 9 after that add 1 to your number. So if you divide your answer of a product of length times height by two you will get the area of a triangle. Roof pitch is given as the number of inches in height change over the distance of one foot. How to calculate the roof area of a building roof width m x roof slope height m half roof area m take this example of a perfectly square house with 76m floor space a 45 pitched roof and a 2 35m roof height.

Next square your result. Hip roof area calculator. 1 9 1. To accurately calculate the area of your roof you must first determine its slope or pitch.

Calculate or enter the square footage of the attic or area to be vented. Let owens corning roofing help you calculate exactly how much ventilation you will need for a healthy and balanced attic with our 4 step ventilation calculator. Hip roof is a roof with a sharp edge or edges from the ridge to the eaves where the two sides meet. The length l times the height h of a triangle is twice its area a2.

1 of rain on 1 000 sf roof will yield 623 gallons roof area m2 x precipitation amount mm amount collected liters other water conservation calculators. 1 roof square 100 square feet. Here we explain and include examples of simple calculations and also examples of using the tangent function to tell us the roof slope or angle the rise and run of a roof the distance under the ridge to the attic floor and how wide we can build an attic room and still have decent head room.