How Do You Measure A Roof Of A Building

8 inches and you have an 8 in 12 pitch.

How do you measure a roof of a building.

To measure a roof start by measuring the length and width of the building s exterior walls and multiplying them to get the area. 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. Pitch measurement method 1. For example what we need on the picture of the roofs below are measurements of all the blue or red lines.

Roughly draw out your roof on a piece of paper. If you were to click on the peaks it wouldn t give you an accurate reading of your measurement. Outside of the u s a degree angle is typically used. 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.

First measure the length and width of each surface on the roof then multiply these values to get the square footage of that surface. So if you divide your answer of a product of length times height by two you will get the area of a triangle. Make sure to document the number of chimneys skylights or other obstructions and include dormers in your measurements. Measure the amount of horizontal overhang between the building s outer wall and the roof s outer edge.

If this distance measures 4 inches you have a 4 in 12 pitch. The length l times the height h of a triangle is twice its area a2. Calculating an area of a triangle when estimating a roof. For instance a 7 12 roof pitch means that the roof rises 7 inches for every 12 horizontal inches.

It does have to contain all the straight lines of your roof and an accurate measurement of those lines. Remember it doesn t have to be to scale or look pretty. 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. 1 roof square 100 square feet.