Roof Measurements From The Ground

Calculate the pitch of the roof.

Roof measurements from the ground.

Determine your roof pitch see roofpitch if you need help. We ll use satellite imagery and trigonometry to calculate your roof s measurements. For instance a 7 12 roof pitch means that the roof rises 7 inches for every 12 horizontal inches. Outside of the u s a degree angle is typically used.

Find the length and width of the building s exterior walls. The length l times the height h of a triangle is twice its area a2. 8 inches and you have an 8 in 12 pitch. Take the following steps to measure your roof from the ground.

Go all the way around your house and fill in your outline with your measurements making sure to account for overhang. Stretch your tape measure along the walls from end to end. So if you divide your answer of a product of length times height by two you will get the area of a triangle. 1 roof square 100 square feet.

This can make it even safer to do your measuring and it also removes a level of guessing to your calculation. Pitch measurement method 2 2. The pitch is the steepness of the roof. There are many great benefits to using google earth to measure your roof but nothing is as good as using diy s satellite roof measurement.

The first of which is that you don t even have to go up on the roof. To find the pitch of your roof you ll first. It is often compared to slope but is not exactly the same. Section off your roof and write your calculations down as shown below dotted lines.

The first technique is referred to as the shingle count method which is used for estimating the measurements of all rectangular shaped sections of a roof. 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. L h 2 area calculating an area of a triangle when estimating a roof. Research other methods for measuring a roof from the ground online or talk to a roofing contractor.

Use a pitch. Use a simple formula to approximate the square footage of triangular areas where two sections of a roof meet at each. 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. Measuring your roof from the ground 1.

To sum it up each individual tab on a 3 tab shingle measures approximately 12 wide by 6 high.