Measure the pitch of your roof in the attic.
How do you measure a roof square.
8 inches and you have an 8 in 12 pitch.
From the 1 ft 0 30 m spot you marked on the level measure upward to the rafter.
The length l times the height h of a triangle is twice its area a2.
Outside of the u s a degree angle is typically used.
If this distance measures 4 inches you have a 4 in 12 pitch.
First measure the length and width of each surface on the roof then multiply these values to.
Because each 100 square feet of roof is one roofing square divide.
1 roof square 100 square feet.
This number will provide you the level area beneath the roof.
Pitch measurement method 2 2.
For example if your home is 60 feet long and 40 feet wide you would multiply the length by the width and come up with 2 400 square feet.
How do you calculate square footage for a roof.
Hold the end you measured from against the bottom of a rafter so it s sticking straight out horizontally and is level.
If a section is 120 feet 37 m x 100 feet 30 m its total square footage would be 12 000 square feet 1 100 m 2.
Be sure to find the area of any dormers on your roof as well.
For instance a 7 12 roof pitch means that the roof rises 7 inches for every 12 horizontal inches.
Mark a length of 1 foot 0 30 m on a long level starting from one end.
Measure all your hips valleys ridges eaves and rakes.
The roof surface area would be 24.
Steps to measuring roof square footage.
Be careful walking around so you don t damage your roof.
How to calculate your roof square footage.
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.
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.
Wear shoes boots with proper traction to avoid slipping.
Multiply the length by the width to find the area of rectangular sections.
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.
To convert the square footage to roof squares divide the square footage by 100.
Measure the ground dimensions of the house using a tape measure and write down these dimensions.
Add all your measurements together to get your total square footage.
How to determine your roof pitch.
L 30 feet h 12 feet 30 12 2 180 square feet.
How to measure a roof.
For your safety use a sturdy reliable ladder and secure to your roof.
Use a tape measure to note the length and width of your roof including dormers.
