How Many Course Of Shingles In A Roof In

Finally nail the first course of shingles directly on top of and flush with the starter course.

How many course of shingles in a roof in.

The starter course protects the roof by filling in the spaces under the cutouts and joints of the next row first course of shingles. Use four roofing nails per shingle as. In addition this starter course protects the roof by filling in any gaps. Continue to chalk additional guidelines based on the width of the shingle through at least four courses rows across the roof.

Take care that the shingles are correctly aligned with consistent reveals. To estimate roofing materials start by finding the total square footage of the roof and divide the number by 100 to determine the number of squares in the roof. Since it takes 3 bundles of shingles to cover a square plan to purchase 3 bundles for each square. The adhesive on the starter course seals the tabs of the first full course.

These shingles are instrumental in making sure the asphalt shingles are correctly laid out on your roof. Starting at the bottom of the roof map out a guideline with chalk. Of course there are some measurements which will need to be taken before you are able to calculate the number of roof shingles that you need. How you get shingles before you start the calculation you need to be aware that shingles are sold by the square and by the bundle.

As a rule of thumb there are 3 bundles to a square assuming that you are using three tab strip shingles. However shingles are packaged in a way that they are light enough for the average person to carry around. A square of shingles is the number of shingles needed to cover 100 sq feet of roof area. The most accurate way to determine how many bundles of shingles you ll need is to hop up on a roof and measure each roof plane.

Lay a starting row at the bottom of the roof along the edge. Install four or five courses of shingles along the bond lines in an alternating pattern as shown. If these first shingles are not installed correctly there will be problems with the entire set of shingles. To calculate the size of the roof you need to measure the size of the roof as if it were flat account for roof pitch calculate square footage and finally determine how many squares of material are required for the roof the calculator above can handle all of this simply enter the length width and pitch and it will determine the size of the roof in squares.

Use your chalk and tape measure to mark about 12 inches up on the roof for the first set of shingles. Place nails in the three tab shingles about 3 4 inch 1 8 centimeters above the cutouts near where the tab meets the upper part of the shingle.