The first step in a free roofing estimate is measuring the roof dimensions.
Houw to measure to roof.
You will need to express this size in terms of square feet.
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.
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.
Roughly draw out your roof on a piece of paper.
Make sure to document the number of chimneys skylights or other obstructions and include dormers in your measurements.
Select the style that best matches your project and move on to step 1.
Outside of the u s a degree angle is typically used.
For instance a 7 12 roof pitch means that the roof rises 7 inches for every 12 horizontal inches.
Measure all your hips valleys ridges eaves and rakes.
Measuring your roof from the ground 1.
L 30 feet h 12 feet 30 12 2 180 square feet.
Use a pitch.
It does have to contain all the straight lines of your roof and an accurate measurement of.
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.
Stretch your tape measure along the walls from end to end.
The pitch is the steepness of the roof.
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.
First measure the length and width of each surface on the roof then multiply these values to get the square footage of that surface.
The length l times the height h of a triangle is twice its area a2.
To find the pitch of your roof you ll first.
Remember it doesn t have to be to scale or look pretty.
1 roof square 100 square feet.
Add all your measurements together to get your total square footage.
So if you divide your answer of a product of length times height by two you will get the area of a triangle.
Calculate the pitch of the roof.