Craftsman CTS205 manual 114, Hanging the starter course

CertainTeed Vinyl Siding Installation Guide

9-3/8"

5-1/2"

plumb	finished
line	height line

9-3/8"

gap on “v”	remainder of
	“scallop”

plumb line

Hanging the starter course

To end up with a single “round” centered at the peak of the gable, you must properly locate the first starter panel.

Begin by marking a vertical plumb line from the peak.

Then measure and mark the finished height line. In our example, using a starter course with a 5-1/2" visible height, the finished height is 9-3/8".

With your ruler inserted into the pocket of the lower J-channel, mark a line on the substrate equal to the finished height (remember to allow 1/4" for expansion). Repeat at several points along the gable base. Use these marks to strike a horizontal level line that will guide the nailing of the starter course.

The point where the plumb line and the horizontal level line intersect marks the starting point for hanging the first starter course panel (if the first starter panel intersects the plumb line).

Determine whether you will center a “scallop” or a “V” at the starting point. This decision is based on the number of courses required to complete the gable.

The rule of thumb is:

Center an upper scallop if the initial calculations had less than 0.5 courses remaining (0.44 in our example).

Center the gap or “V” of the upper course if more than 0.5 courses remained. (In our example we require 5.44 courses, so we would center on a scallop.)

More than one panel will probably be required to reach the plumb line. Measure from the plumb line into the pocket receiving channel (leaving 1/4" for expansion) as illustrated at left.

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