Steep slope roof pitch of 12 or 45 degrees.
Roofing measurements for shingles.
Next divide your total area by 100 to calculate the number of roofing squares you ll need to buy.
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The average roll of 15 pound roofing felt covers about 400 ft 2 or 4 squares while the average roll of 30 pound roofing felt covers about 200 ft 2 or 2 squares.
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You will then have to get the measurement of the rake of the roof.
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Consider other underlayment options as needed such as rubber or tar products.
Required measurements include the following.
Medium steep slope roof pitch of 9.
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Medium slope roof pitch of 6.
To do this you need to note that one tab will be equal to 1 foot.
Medium low slope roof pitch of 3 or 4.
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To measure for roofing shingles start by calculating the area of each plane or section of the roof.
Rolls of felt are 36 wide x 144 long for 15 and 72 long for 30.
If the existing shingles are standard 3 tab shingles you can get this measurement by taking note of the number of tabs along the eaves and ridges then determine the length in feet.