How To Size Roof For Shingles

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

How to size roof for shingles. How to measure for roof shingles. 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. 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.

Measure the width and length of each section of your roof. A square of shingles is the number of shingles needed to cover 100 sq feet of roof area. The specifics of how shingles are laid on your roof vary by manufacturer. 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. Required measurements include the following. Hold the end you measured from against the bottom of a rafter so it s sticking straight out horizontally and is level. Snap a horizontal chalk line over the starting row to use as a guide.

Lay the first row of shingles directly covering the narrow starter row. To use this method you will need to measure the length of the eaves on each of the roof planes. To find the squares divide the overall roof area by 100 and then round up. The more common roof thickness is 3 4 inch decking.

Measure the pitch of your roof in the attic. For instance if the roof is 1550 square feet then it is 16 squares. Add the areas of each section together. However shingles are packaged in a way that they are light enough for the average person to carry around.

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. A square simply refers to a 10 x 10 square of roofing. How shingles are installed. Contractors start at the bottom of the roof and work across the roof s surface and up.

As a rule of thumb there are 3 bundles to a square assuming that you are using three tab strip shingles.