Roofing Using Half Tab Method

Mark the center of each section and use a compass to mark 30 degree angles along the sides of each.

Roofing using half tab method.

For a racking or midroof pyramid layout method snap two vertical lines called bond lines near the center of the roof the appropriate distance apart. The cut outs separating the shingle tabs line up every other course. Three tab shingles are most typically installed with a half tab offset that yields the characteristic brickwork appearance. Set the first shingle of the second row back a half tab 6 inches 17 centimeters from the edge of first shingle on the first row and so that the bottom of its tabs just touches the tops of the cutout slots on the shingle below.

This article discusses best roofing practices for the installation of asphalt roof shingles including installation temperature shingle sealing methods shingle course offsets asphalt shingle nailing location and specifications low slope and steep slope limits for asphalt shingles and roof flashing at building eaves and around skylights. This 1 2 tab has to be cut off where it hangs off the left edge of the gable roof. For example if you re roofing from left to right align the first shingle of the second course so the right side of the shingle. Use a heavy duty utility knife to separate the shingles into thirds by cutting them at each tab.