Of the old shingles have not been removed from the roof you can easily use this method to calculate the number of shingles you are going to need.
How to measure your roof for new shingles.
It generally takes three packs of shingles to cover 100 square feet 9 29 square meters.
To use this method you will need to measure the length of the eaves on each of the roof planes.
Required measurements include the following.
Measuring the area of your roof isn t the simplest process.
If you use a measuring tape you ll need someone to hold the tape while you measure the area.
The key is to be as accurate as possible since falling short or an overage could mean thousands of dollars when planning your roofing budget.
You can get a decent estimation this way.
Then each measurement is recorded on the diagram applicable to that roof surface.
Alternatively you can purchase a measuring wheel from your local hardware store.
Don t worry too much if you don t know how to measure a roof for shingles.
One way to get an estimate is to take the square footage or meterage of the building and multiply it by the slope factor pitch of your roof.
Below there is a simple triangle and the math used to work out.
Architectural shingles are another option and are installed the same way as 3 tab shingles but give your roof more of a 3 d effect due to their varied shapes.
This way you don t have to climb on your roof at all.
One easy way is to use a roof measurement website that utilizes satellite imagery.
Obviously you want to stay safe while still getting a close estimate.
Climb onto your roof and measure each section by its height and width.
Measure and record your findings.
Record the measurements on your sketch of the roof.
However if you feel you can safely go up on your roof measure each section starting at the top of the ridge and going down to the bottom of the slope.
How to measure a roof for shingles.
Roofing is measured in squares.
Measure your roof so you can be sure you buy the right amount of shingles.