How To Measure A Roof

If this distance measures 4 inches you have a 4 in 12 pitch.

How to measure a roof.

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. To find the area of a triangular roof multiply the length of the bottom edge by the length of the ridge then divide the product by 2. 8 inches and you have an 8 in 12 pitch. It is often compared to slope but is not exactly the same.

One way to get an estimate is to take the square footage or meterage of the building and multiply it by the slope factor pitch of your roof. 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. You ll need to figure out the vertical distance also known as the rise over a 12 horizontal segment also known as the run. Measuring the area of your roof isn t the simplest process.

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 next step is to measure the pitch also referred to as the roof slope of the roof deck. For a trapezoidal roof add the lengths of the bottom edge and ridge together divide the sum by 2 and multiply the number you get by the measurement of the line running. If you re going to use an area calculator you can do this separately for each level of the home to ensure a more accurate calculation.

The roof area is simply 114x18x2 plus 30x18x2 giving 5184 square feet which is perfectly adequate for estimating materials. To measure a roof start by measuring the length and width of the building s exterior walls and multiplying them to get the area. Once you have this measurement you can then measure the footprint of the home and estimate the actual roof calculation based on the particular angle of the roof. Calculate the area of each roof face.

For instance a 7 12 roof pitch means that the roof rises 7 inches. Roof pitch is the measurement of a roof s vertical rise divided by its horizontal run.