How Many Course Of Shingles In A Roof In

Step 8 the complete shingle roof.

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. 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. Take care that the shingles are correctly aligned with consistent reveals. Later you will need to lift up the outermost ends of the shingles on each side in order to slip in a shingle so don t drive the outermost nails now.

Lay a starting row at the bottom of the roof along the edge. 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. Since it takes 3 bundles of shingles to cover a square plan to purchase 3 bundles for each square. 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. Then add 10 to the number to account for waste. Use four roofing nails per shingle as. These shingles are instrumental in making sure the asphalt shingles are correctly laid out on your roof.

Because asphalt shingles are routinely exposed 5 in rip down the first strip the starter course so that it is 5 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. It is best to use timber roofing battens and counter battens with a membrane to allow adequate air flow if necessary. Since the starter shingles will be covered by the roof shingles it doesn t matter what color they are except in special situations see below.

To level out an existing asphalt shingle roof rip down reduce the height of two courses of shingles as shown in the drawing below. 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. In addition this starter course protects the roof by filling in any gaps. Separate shingles approximately 6mm apart.

Starter shingles are the initial shingle products installed on the roof just before the first course of the finish shingles which will comprise the visible parts of the roof. The adhesive on the starter course seals the tabs of the first full course.