How To Figure Squares Of A Roof

If the house has an irregular shape measure each part separately figure the separate areas and add them together.

How to figure squares of a roof. L h 2 area calculating an area of a triangle when estimating a roof. Divide any irregularly shaped areas of the roof into more manageable triangles and rectangles then calculate square footage for those individual elements and add them to get the total square footage. 1 roof square 100 square feet. For instance if the roof is 1550 square feet then it is 16 squares.

As an example if your overhang is 12 inches you ll add 2 feet to the overall length and 2 feet to the overall width of the house. Roof pitches in degrees. The length l times the height h of a triangle is twice its area a2. Because each 100 square feet of roof is one.

In the united states a run of 12 inches 1 foot is used and pitch is measured as the rise of the roof over 12 inches. This is simply 100 square feet of roof. Convert the area to roofing squares. Outside of the u s a degree angle is typically used.

This nominal square footage amount is then multiplied by a factor associated with the roof s pitch. A square simply refers to a 10 x 10 square of roofing. 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 take an area made up of a triangle that s 20 feet high and has a base of 40 feet plus a square that s 40 feet by 40 feet.