How To Size Roof For Shingles

This is simply 100 square feet of roof.

How to size roof for shingles.

A square simply refers to a 10 x 10 square of roofing. However shingles are packaged in a way that they are light enough for the average person to carry around. How to measure for roof shingles. Measure the pitch of your roof in the attic.

To use this method you will need to measure the length of the eaves on each of the roof planes. Snap a horizontal chalk line over the starting row to use as a guide. How shingles are installed. The specifics of how shingles are laid on your roof vary by manufacturer.

Hold the end you measured from against the bottom of a rafter so it s sticking straight out horizontally and is level. Lay the first row of shingles directly covering the narrow starter row. The more common roof thickness is 3 4 inch decking. When installing asphalt shingles on felt only to any grade decking you should use 1 inch long roofing nails.

Add the areas of each section together. How to measure a roof for shingles step by step the process of accurately measuring a roof involves first making a diagram of the roof to show the basic shapes of each roof plain and how they relate to one another. Cut six inches off the length of the first starter shingle nailed on then use the rest of them full size. A square of shingles is the number of shingles needed to cover 100 sq feet of roof area.

To find the squares divide the overall roof area by 100 and then round up. Then each measurement is recorded on the diagram applicable to that roof surface. Contractors start at the bottom of the roof and work across the roof s surface and up. 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.

As a rule of thumb there are 3 bundles to a square assuming that you are using three tab strip shingles. Multiply the width and length measurements together to determine the area. Required measurements include the following. Some roofing shingles such as duration are applied with a 6 1 2 inch offset and a 5 5 8 inch exposure over a prepared roof deck.

Mark a length of 1 foot 0 30 m on a long level starting from one end.