11 Best Of How To Measure Shingles For A Roof From The Ground New Update 2021. The length l times the height h of a triangle is twice its area A2. To sum it up each individual tab on a 3-tab shingle measures approximately 12 wide by 6 high.
So if you divide your answer of a product of length times height by two you will get the area of a triangle. Shingles overlap each other beginning at the eaves of the roof up to the peak where a roof cap overlaps the final layer of shingles. Place the end hook of the tape on the corner and run it all the way to the opposite corner of the house.
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.
Starter Strip the perimeter of the roof in lineal feet including the rakes. If all the roof planes are rectangles you simply need to multiply the length times the width of each plane to get the square footage. Remember that the length and width need to be found for the roof not the house so take into account that the roof overhangs the building. I typically begin by counting the of shingles from left to right which gives me the total width of the section in feet.