How Do You Work Out The Area Of A Roof

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.

How do you work out the area of a roof.

This distance is the rise. If this distance measures 4 inches you have a 4 in 12 pitch. For example if your measurement is seven inches the rise is expressed as 7 12 in roofing terminology. Place the other end of the level at the peak of the roof and hold it level.

The length l times the height h of a triangle is twice its area a2. In cases where a roof has a complex shape such as in the image to the right measuring the dimensions and areas of each part of the roof to calculate total area will result in a more accurate measurement of area. Then take the product of these two dimensions and multiply it by your pitch multiplier. To calculate the area of your roof first you ll need to calculate the pitch of it.

The calculated area is only an estimation. The calculator cannot account for complex shapes based on a measurement of square footage alone. If the roof has multiple pitches such as those found on dormer windows or porches you will need to draw these separately. Next you will need to use a roofing materials calculator.

So if you divide your answer of a product of length times height by two you will get the area of a triangle. 8 inches and you have an 8 in 12 pitch. With an online roofing calculator you will usually be able to drill down a bit deeper in order to see a fine grained cost breakout on a sq ft basis. Simply input the surface area of the roof choose from one of the available options and you will get your first roofing estimate.

The number you get will be an accurate estimate of how much area you have to cover for your roofing project. Then proceed to draw the surface area of the roof that has a different pitch. 1 roof square 100 square feet. First use your measuring tape to measure 12 inches on your large level and make a mark at the 12 inch line.

Pitch measurement method 1. Multiply the area by the pitch multiplier to get the roof s square footage. Measure the distance from the surface of the roof to the bottom of the level at the 12 inch mark. How to calculate the roof area of a building.

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. The roof slope height is 6 98m. After drawing the perimeter of the roof add a new drawing layer with the plus symbol found in the bottom right corner. L h 2 area calculating an area of a triangle when estimating a roof.