How Much Shingles Do I Need For My Roof

If the existing shingles are standard 3 tab shingles you can get this measurement by taking note of the number of tabs along the eaves and ridges then determine the length in feet.

How much shingles do i need for my roof.

Your roofer will know that steeper roofs use more shingles than lower sloped roofs for the same house size and there are established slope multiplier factors to make this calculation simple see table below. High wind areas and other types of shingles may need more. Roof surfaces are measured in squares a square is an area of roof which measures 100 square feet. Note that in the last 3 4 years costs of roof shingles and many accessories have gone down by an average of 18 20 currently the us national average for benchmark architectural shingles is around 74 51 square or 25 per bundle.

For example a very steep roof on a 1 000 square foot attic will need more shingles than a lower sloped roof on the same sized attic. The result is 240 and this means you would need 240 squares of shingles to cover that roof. A square of shingles is the number of shingles needed to cover 100 sq feet of roof area. 320 nails will be needed to install a square of standard 3 tab shingles assuming four nails per shingle and 80 shingles per square.

To determine the number of squares on the gable roof above simply divide its total of 24 000 square feet by 100. Keep in mind that a drip edge will be needed to protect the edge of the roof from rot vents and other materials such as flashing or caulk. As a rule of thumb there are 3 bundles to a square assuming that you are using three tab strip shingles. To do this you need to note that one tab will be equal to 1 foot.