How To Figure Roof Size

Pitch measurement method 1.

How to figure roof size.

This was before i started using these two calculations. To find the pitch of your roof you ll first. 1 roof square 100 square feet. Find the length and width of the building s exterior walls.

For hip roofs i measure the length of the house and then i measure the width. Use a pitch. The length l times the height h of a triangle is twice its area a2. Calculate the pitch of the roof.

The first step in a free roofing estimate is measuring the roof dimensions. For instance a 7 12 roof pitch means that the roof rises 7 inches for every 12 horizontal inches. For instance if the roof is 1550 square feet then it is 16 squares. The pitch is the steepness of the roof.

Thus in a simple style house you ll only have to click on the corners. Measuring your roof from the ground 1. If you were to click on the peaks it wouldn t give you an accurate reading of your measurement. To find the squares divide the overall roof area by 100 and then round up.

L h 2 area calculating an area of a triangle when estimating a roof. But i would rather slightly over estimate the size of a roof job rather than under estimate it like i did a few times early on. You will need to express this size in terms of square feet. 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.

A square simply refers to a 10 x 10 square of roofing. Outside of the u s a degree angle is typically used. Outline the roof at the points that are on the same level or elevation to ensure that you re getting an accurate calculation of your roofing measurements. 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.

I then multiply these 2 numbers together and i take that number and multiply it by. 8 inches and you have an 8 in 12 pitch. So if you divide your answer of a product of length times height by two you will get the area of a triangle. Stretch your tape measure along the walls from end to end.

The rise is the distance from the top of a stud wall to the peak of the roof. Thus a moderate 6 in 12 roof pitch means the roof rises 6 inches for every 12 horizontal inches it runs. Keep in mind that the average size of a roof is 1 700 square feet so your total will likely be 10 higher or lower than this figure. This is simply 100 square feet of roof.