Roofing Using Half Tab Method

This 1 2 tab has to be cut off where it hangs off the left edge of the gable roof.

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. Three tab shingles are most typically installed with a half tab offset that yields the characteristic brickwork appearance. Use a heavy duty utility knife to separate the shingles into thirds by cutting them at each tab. Mark the center of each section and use a compass to mark 30 degree angles along the sides of each.

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. The cut outs separating the shingle tabs line up every other course. Check them with a framing square or measure so the lines are parallel with the rake ends. 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.