Use a pitch.
Houw to measure to roof.
L 30 feet h 12 feet 30 12 2 180 square feet.
Remember it doesn t have to be to scale or look pretty.
So if you divide your answer of a product of length times height by two you will get the area of a triangle.
Measuring your roof from the ground 1.
For instance a 7 12 roof pitch means that the roof rises 7 inches for every 12 horizontal inches.
Select the style that best matches your project and move on to step 1.
First measure the length and width of each surface on the roof then multiply these values to get the square footage of that surface.
Most roofing contractors typically measure a roof by calculating the area of a roof and then adding on 10 for possible waste.
How to measure a roof in the sample below you will have 5 different calculations and that should match the number of sections you wrote down when you started.
Make sure to document the number of chimneys skylights or other obstructions and include dormers in your measurements.
The pitch is the steepness of the roof.
It does have to contain all the straight lines of your roof and an accurate measurement of.
Add all your measurements together to get your total square footage.
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.
When roofing contractors are in high demand such as they are in florida after a hurricane this way of estimating a roof may be okay but in a tighter market you may need to have sharper estimating skills in order to compete with your competitors and make a profit.
The first step in a free roofing estimate is measuring the roof dimensions.
To find the pitch of your roof you ll first.
Measure all your hips valleys ridges eaves and rakes.
You will need to express this size in terms of square feet.
Roughly draw out your roof on a piece of paper.
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.
Find the length and width of the building s exterior walls.
The hip style roof is in blue and the gable style roof is in red.
Outside of the u s a degree angle is typically used.
1 roof square 100 square feet.