How To Size Roof For Shingles

A square of shingles is the number of shingles needed to cover 100 sq feet of roof area.

How to size roof for shingles.

Lay the first row of shingles directly covering the narrow starter row. When installing asphalt shingles on felt only to any grade decking you should use 1 inch long roofing nails. Hold the end you measured from against the bottom of a rafter so it s sticking straight out horizontally and is level. Mark a length of 1 foot 0 30 m on a long level starting from one end.

Then each measurement is recorded on the diagram applicable to that roof surface. Measure the width and length of each section of your roof. 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. To use this method you will need to measure the length of the eaves on each of the roof planes.

Measure the pitch of your roof in the attic. How shingles are installed. For instance if the roof is 1550 square feet then it is 16 squares. Contractors start at the bottom of the roof and work across the roof s surface and up.

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. The more common roof thickness is 3 4 inch decking. The specifics of how shingles are laid on your roof vary by manufacturer. Cut six inches off the length of the first starter shingle nailed on then use the rest of them full size.

However shingles are packaged in a way that they are light enough for the average person to carry around. Snap a horizontal chalk line over the starting row to use as a guide. To find the squares divide the overall roof area by 100 and then round up. A square simply refers to a 10 x 10 square of roofing.

How to measure for roof shingles. Multiply the width and length measurements together to determine the area. Add the areas of each section together. This is simply 100 square feet of roof.

From the 1 ft 0 30 m spot you marked on the level measure upward to the rafter.