Roofing Using Half Tab Method

It s better to use the factory edges of a half sheet of plywood as a guide.

Roofing using half tab method.

The simplest way to do this is to use the half tab offset method. 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. 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.

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. Mark the center of each section and use a compass to mark 30 degree angles along the sides of each. This 1 2 tab has to be cut off where it hangs off the left edge of the gable roof. Use a heavy duty utility knife to separate the shingles into thirds by cutting them at each tab.