Howto Determine Where Roof Ridge Lies

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Howto determine where roof ridge lies.

Using the end common rafter length i calculated the ridge at 6 3 8 by taking the length of the bldg of 112 minus both end common rafters of 105 5 8. That way you ll end up with a watertight ridge. The first step in a free roofing estimate is measuring the roof dimensions. As a reminder please don t forget to add height of rafter thickness of roofing material and ridge vent to the number that you ll get using our calculator.

This will be the third of a series of three videos if. You will need to express this size in terms of square feet. Keep in mind that the average size of a roof is 1 700 square feet so your total will likely be 10 higher or lower than this figure. Let owens corning roofing help you calculate exactly how much ventilation you will need for a healthy and balanced attic with our 4 step ventilation calculator.

Subtract the shorter wall length from the longer wall length and add 1 5 inches for the length of the ridge beam or board. If you ever wondered how to figure your overall building height or roof height here we have a calculator to make life a little easier for you. When you reach the top on the other side of the roof run that paper up and over as well. Using the run of 4 i calculate the ridge at 16 length of bldg of 112 minus run on each end.

In this video i will look at how to calculate the length of the ridges on a broken hip and valley roof. The building line is the point from which you start to calculate the run of your common rafters to the centerline of the roof. I also assume you ll be using a 2x material for the ridge board. Enter square footage calculate or enter the square footage of the attic or area to be vented.