How Do You Work Out The Area Of A Roof

Place the other end of the level at the peak of the roof and hold it level.

How do you work out the area of a roof.

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. The calculator cannot account for complex shapes based on a measurement of square footage alone. The length l times the height h of a triangle is twice its area a2. L h 2 area calculating an area of a triangle when estimating a roof.

Then take the product of these two dimensions and multiply it by your pitch multiplier. How to calculate the roof area of a building. The roof slope height is 6 98m. Measure the distance from the surface of the roof to the bottom of the level at the 12 inch mark.

Multiply the area by the pitch multiplier to get the roof s square footage. 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. The calculated area is only an estimation.

If this distance measures 4 inches you have a 4 in 12 pitch. The number you get will be an accurate estimate of how much area you have to cover for your roofing project. Next place your ladder against your house at the gable end. Next you will need to use a roofing materials calculator.

Climb to the top of your roof. This distance is the rise. First multiply the length by the width. If the roof has multiple pitches such as those found on dormer windows or porches you will need to draw these separately.

Simply input the surface area of the roof choose from one of the available options and you will get your first roofing estimate. 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. First use your measuring tape to measure 12 inches on your large level and make a mark at the 12 inch line. Then proceed to draw the surface area of the roof that has a different pitch.

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. 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. To calculate the area of your roof first you ll need to calculate the pitch of it. For example if your measurement is seven inches the rise is expressed as 7 12 in roofing terminology.