How To Size Roof For Shingles

Contractors start at the bottom of the roof and work across the roof s surface and up.

How to size roof for shingles.

From the 1 ft 0 30 m spot you marked on the level measure upward to the rafter. How to measure for roof shingles. 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. To find the squares divide the overall roof area by 100 and then round up.

The specifics of how shingles are laid on your roof vary by manufacturer. However shingles are packaged in a way that they are light enough for the average person to carry around. Multiply the width and length measurements together to determine the area. Lay the first row of shingles directly covering the narrow starter row.

Mark a length of 1 foot 0 30 m on a long level starting from one end. 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. Then each measurement is recorded on the diagram applicable to that roof surface. Measure the width and length of each section of your roof.

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. Cut six inches off the length of the first starter shingle nailed on then use the rest of them full size. For instance if the roof is 1550 square feet then it is 16 squares. This is simply 100 square feet of roof.

How shingles are installed. The more common roof thickness is 3 4 inch decking. Add the areas of each section together. As a rule of thumb there are 3 bundles to a square assuming that you are using three tab strip shingles.

A square simply refers to a 10 x 10 square of roofing. Required measurements include the following. To use this method you will need to measure the length of the eaves on each of the roof planes. When installing asphalt shingles on felt only to any grade decking you should use 1 inch long roofing nails.

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