How To Size Roof For Shingles

How to measure for roof shingles.

How to size roof for shingles.

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. How shingles are installed. The more common roof thickness is 3 4 inch decking. Mark a length of 1 foot 0 30 m on a long level starting from one end.

For instance if the roof is 1550 square feet then it is 16 squares. Measure the width and length of each section of your roof. Snap a horizontal chalk line over the starting row to use as a guide. Cut six inches off the length of the first starter shingle nailed on then use the rest of them full size.

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. The specifics of how shingles are laid on your roof vary by manufacturer. Measure the pitch of your roof in the attic.

Lay the first row of shingles directly covering the narrow starter row. 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. Multiply the width and length measurements together to determine the area. 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. A square of shingles is the number of shingles needed to cover 100 sq feet of roof area. However shingles are packaged in a way that they are light enough for the average person to carry around. Contractors start at the bottom of the roof and work across the roof s surface and up.

From the 1 ft 0 30 m spot you marked on the level measure upward to the rafter. To find the squares divide the overall roof area by 100 and then round up. Add the areas of each section together. A square simply refers to a 10 x 10 square of roofing.

When installing asphalt shingles on felt only to any grade decking you should use 1 inch long roofing nails.