Calculation Roof Area Formula

Dividing by 12 gives the ratio of inches in rise per distance.

Calculation roof area formula.

Roof area ft2 x precipitation amount in x 0 623 amount collected gallons easy formula to remember. To accurately calculate the area of your roof you must first determine its slope or pitch. Hip roof area calculator. If your number is 1 3 squared would yield 1 9 after that add 1 to your number.

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. A roof s pitch is determined by how much it rises vertically for every foot it runs horizontally. 1 9 1.

Thus a moderate 6 in 12 roof pitch means that the roof rises 6 inches vertically for every 12 horizontal inches it runs. 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. So if you divide your answer of a product of length times height by two you will get the area of a triangle. Next square your result.

Calculate or enter the square footage of the attic or area to be vented. The roof slope height is 6 98m. 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. 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.

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. For example if your roof s pitch is 4 in 12 you would divide 4 by 12. Divide your roof pitch by 12.

Roof slope pitch rise run area calculation methods. Roof pitch is given as the number of inches in height change over the distance of one foot. 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.