Estimate Roof Size

Roof measuring tool

Measure the base area of your property
That will be the roof base width. Then, measure the distance of the other side of the structure from the edge of the eave to the other. That will be the roof base length. Multiply those figures together to get an estimate of the base area for the roof structure.

How Many Roofing Shingles Do I Need?
  1. Measure the length and width of each plane on the roof (including dormers) then multiply length times width.
  2. Add the square footage of each of the planes together.


Simply locate a roof rafter board, place the end of the level against the bottom edge and measure from the 12-inch mark vertically to the bottom edge of the rafter. This will give you the rise over run, or pitch. For example, if you measure 4 inches, the pitch of your roof is 4:12.

How do you measure gutters from the ground?

Measure the length in feet of each roof edge where you will install seamless gutters, using a tape measure laid on the ground. Round the measurement up to the next whole foot. If the gutter must turn corners along the roof edge, measure the length in feet of each segment of the roof edge.

How do you measure a roof with a tape measure?

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With your measuring tape, measure vertically from the top point to the bottom point of your roof. (This is also called the rise.) Repeat this over 12 inches, then place the measurement over “12”. (For example: If your rise is 4 inches over 12 inches, then your slope measurement is 4/12.). Follow Us for more details Please!

How do you estimate roofing costs?

Measure the square metre area of the roof you want replaced. The range of prices to replace your roof is: $50 to $95 per square metre. So multiple this rate against the square metre of the roof you want replaced.
What Questions Should You Ask Your Roofing Contractor?
  • Is the company a licensed contractor and a member in good standing of a trade association? …
  • How long has the company been in business? …
  • Will the company provide referrals or references from previous jobs? …
  • Does the roofing contractor or the company carry insurance?
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