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 size roof for shingles.

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. 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.

Snap a horizontal chalk line over the starting row to use as a guide. As a rule of thumb there are 3 bundles to a square assuming that you are using three tab strip shingles. 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. The more common roof thickness is 3 4 inch decking.

Multiply the width and length measurements together to determine the area. Hold the end you measured from against the bottom of a rafter so it s sticking straight out horizontally and is level. How to measure for roof shingles. Measure the width and length of each section of your roof.

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

To use this method you will need to measure the length of the eaves on each of the roof planes. For instance if the roof is 1550 square feet then it is 16 squares. Measure the pitch of your roof in the attic. Cut six inches off the length of the first starter shingle nailed on then use the rest of them full size.

Mark a length of 1 foot 0 30 m on a long level starting from one end. Contractors start at the bottom of the roof and work across the roof s surface and up. Then each measurement is recorded on the diagram applicable to that roof surface. 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.