How to measure a roof and calculate square feet. | 01/2020

Measuring a roof is pretty simple, if you know what you're doing.

To measure this roof we used a 25 foot tape measure and sketched the roof out.

You want to break the roof into simple shapes like squares and rectangles. This is the simplest ways we found to measure a roof by hand.

After doing so, measure the length and width of each shape, if the sqft comes out to lets say 636 sqtf, we round up to 640 sqft. We do this to keep numbers even and simple to add up. 1 or two sqft is not going to make a huge difference in the cost.

Record you sf ft on paper, add them all up and wallah', you have your total sqft of the roof.

I miss spoke in the video, but the roof sqft is always going to be bigger than the actual livable sqft. (ROOF IS ALWAYS GREATER THAN FOUNDATION SQFT)

In the roofing industry there's a rule of thumb, lets say your total sq ft of roof is 2,020, to calculate your waste factor, starter and ridges, one would multiply it by 10% or 15%, these are general rules. if the roof is cut up, have lots of valley or hips, the 10% / 15% rule goes out the window and a manual accurate measurement count would be best.

[2,020 x 15% = 303 sq ft or-- total 2,323 sq ft ]

that's it.

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Видео How to measure a roof and calculate square feet. | 01/2020 канала Rox Roofing & Exteriors