How Many Shingles


How do you determine how many shingles you need to cover a roof?


Measure the roof surface carefully. Each 100 square feet is called a square. There are usually 3 or 4 bundles in a square. Ask your supplier how many bundles in a square of your choice of shingle or give him the square footage and he will tell you.

Also measure the eaves of the roof, the part that has the gutter attached. This gives the linear feet of starter shingle and eave protection, usually of 50 pound, non-perforated roofing felt. Also measure the ridge and hips for shingle caps. Finally measure the valleys for valley flashing. It is a good idea to replace chimney flashings that go on the roof, other flashings and roof vents, as well.


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Hi, I'm Dave Osborne. With over 50 years experience as a journeyman carpenter, foreman and contractor in heavy construction I enjoyed working with apprentices and sharing the tricks of the trade that others shared with me. Now I get emails from Members all over the world and we include many of my answers in our Free Monthly Newsletters. Some of my answers include drawings and instructions specific to a project, but may also answer your questions. I use correct construction terminology, so you can confidently inform your building supply dealers or contractors exactly what you need.


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