How To Measure Roof Area With Pitch

Outside of the u s a degree angle is typically used.

How to measure roof area with pitch.

The incline or pitch of a roof can be easily measured with a level tape measure and a pencil. Roof pitch multiplier roof slope. First use your measuring tape to measure 12 inches on your large level and make a mark at the 12 inch line. The maths behind this number is that it is the square root of rise run 2 1.

The pitch is the steepness of the roof. 8 inches and you have an 8 in 12 pitch. Therefore mark off 12 inches on the level and place it down horizontally against the roof rafter. A roof pitch multiplier also known as a roof pitch factor is a number that when multiplied by the area covered by a sloped roof gives the actual area of the roof.

To calculate the area of your roof first you ll need to calculate the pitch of it. Climb to the top of your roof. Divide the slope by two to get the pitch. For example a standard roof pitch is.

For a simple gable roof the span wall to wall will be twice the size of the run wall to ridge horizontally. For instance a 7 12 roof pitch means that the roof rises 7 inches for every 12 horizontal inches. Stretch your tape measure along the walls from end to end. Here are a couple examples.

If this distance measures 4 inches you have a 4 in 12 pitch. 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. Roof pitch is given as the number of inches in height change over the distance of one foot. Use a pitch.

Next place your ladder against your house at the gable end. 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. Dividing by 12 gives the ratio of inches in rise per distance. Find the length and width of the building s exterior walls.

Measuring your roof from the ground 1. If you do need to calculate the pitch an estimate or shortcut is usually more practical than measuring the roof s overall dimensions. To find the pitch of your roof you ll first. Pitch measurement method 1.