Calculation Roof Area Formula

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.

Calculation roof area formula.

Roof pitch is given as the number of inches in height change over the distance of one foot. Roof area ft2 x precipitation amount in x 0 623 amount collected gallons easy formula to remember. Dividing by 12 gives the ratio of inches in rise per distance. L 30 feet h 12 feet 30 12 2 180 square feet.

To accurately calculate the area of your roof you must first determine its slope or pitch. The length l times the height h of a triangle is twice its area a2. 1 roof square 100 square feet. 1 9 1.

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. So if you divide your answer of a product of length times height by two you will get the area of a triangle. For example if your roof s pitch is 4 in 12 you would divide 4 by 12. Calculate or enter the square footage of the attic or area to be vented.

Divide your roof pitch by 12. 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. If your number is 1 3 squared would yield 1 9 after that add 1 to your number. Calculating the area true once you have your roof s pitch divide the number by 12.

Hip roof area calculator. 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. Next square your result. Thus a moderate 6 in 12 roof pitch means that the roof rises 6 inches vertically for every 12 horizontal inches it runs.

Roof slope pitch rise run area calculation methods. A roof s pitch is determined by how much it rises vertically for every foot it runs horizontally. 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.