- 1). Lay the first row of shingles along the eave so that the shingles line up with the bottom edge of the asphalt shingles already in place. Position the first shingle so that it overhangs the side edge of the roof by 1 to 1-½ inches then nail the shingle into place with four nails through each flap on an asphalt shingle or four to six nails through the top half of a wood shingle.
- 2). Place the next shingle so that it lines up against the edge of the first shingle and also lines up with the bottom edge of the shingles already in place. Again, use rough nails through the flaps of an asphalt shingle or four to six nails in a wood shingle. Continue across the eave until you have a full row of shingles, cutting the last shingle to size with a utility knife or handsaw if necessary.
- 3). Measure upward from the tops of the shingles at one end of the roof 5 to 8 inches, depending upon the size of the shingles you are installing. For a 16-inch shingle, use the 5-inch measurement. For 24-inch shingles, use an 8-inch measurement. Mark the spot at the edge of the roof.
- 4). Go to the other end of the roof, measure the same distance up and mark the distance. Then snap a chalk line from one mark to the other to create a horizontal line across the roof.
- 5). Place the next row of shingles so that their tops line up with the chalk line. Attach the shingles using the same nailing method as used for the first row. When you reach the peak of the roof, move to the opposite side of the roof and work upward from the eave once again.
- 6). Finish covering existing asphalt shingles by installing shingles at the roof's peak. Bend asphalt ridge caps over the peak and nail them into place with four nails on each side of the roof. For wood shingles, install the top row of shingles on one side of the roof so that it lines up with the roof's peak and install the top row of shingles on the other side of the roof so that the tops of the shingles extend over the roof's peak and the top row of shingles on the other side by 1 to 1-½ inches.
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