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.

Roofing using half tab method.

Three tab shingles are most typically installed with a half tab offset that yields the characteristic brickwork appearance. The simplest way to do this is to use the half tab offset method. It s better to use the factory edges of a half sheet of plywood as a guide. Mark the center of each section and use a compass to mark 30 degree angles along the sides of each.

The cut outs separating the shingle tabs line up every other course. This 1 2 tab has to be cut off where it hangs off the left edge of the gable roof. 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. Check them with a framing square or measure so the lines are parallel with the rake ends.