Installation Guide

INT
INT INT
Step 3: Flashing the Sill
A) Important!
a. Use flashing that is 6” minimum in width.
b. Flashing must meet ASTM-D779 performance requirements.
B) Measure the width of the rough opening. Cut a length of flashing that is 12” wider than the
rough opening. This will allow you to run the flashing 6” up each side.
C) Cut 1 1/2” slits at each end of the flashing as shown below. (Fig. 5)
D) Apply sill flashing to the rough opening as shown below. (Fig. 6)
E) Flashing tape must cover the entire sill. If needed, apply an additional flashing piece over the
first one (start from the exterior and work towards the interior). Maintain a minimum 1”
overlap. (Fig. 7)
Fig. 5
Fig. 6
Fig. 7
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