How Do You Measure A Roof Of A Building

Calculating an area of a triangle when estimating a roof.

How do you measure a roof of a building. 3 multiply the amount of overhang by two to include the opposite side of the building. Then calculate the pitch of the roof by placing a level against it angling the level so the bubble is centered and measuring the distance between the end of the level and the roof. 1 roof square 100 square feet. Pitch measurement method 1.

So if you divide your answer of a product of length times height by two you will get the area of a triangle. Roughly draw out your roof on a piece of paper. Thus in a simple style house you ll only have to click on the corners. Remember it doesn t have to be to scale or look pretty.

The length l times the height h of a triangle is twice its area a2. If this distance measures 4 inches you have a 4 in 12 pitch. For instance a 7 12 roof pitch means that the roof rises 7 inches for every 12 horizontal inches. On a ladder beside the roof place the level a foot or so up the roof hold it level and measure from the 12 inch mark on the level s bottom straight down to the roof.

8 inches and you have an 8 in 12 pitch. If you were to click on the peaks it wouldn t give you an accurate reading of your measurement. First measure the length and width of each surface on the roof then multiply these values to get the square footage of that surface. It does have to contain all the straight lines of your roof and an accurate measurement of those lines.

Outside of the u s a degree angle is typically used. Outline the roof at the points that are on the same level or elevation to ensure that you re getting an accurate calculation of your roofing measurements. 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. For example what we need on the picture of the roofs below are measurements of all the blue or red lines.