GreenGuard Commercial Building Wraps - Manual (Page 9)

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G U I D E F O R C O M M E R C I A L A P P L I C A T I O N S
7B. NON-FLANGED WINDOWS
7B.1 PREPARATION OF ROUGH OPENING
Make a square cut around the perimeter of the window opening.
Make two 45 degree 5-inch cuts in the building wrap at the window
head as shown.
Flip the building wrap at the header up and temporarily tape the flap
to the wall. This flap will be folded back down after the head flashing
has been installed in a later step.
7B.2 PREPARATION OF WINDOW SILL
Cut a piece of GreenGuard® SuperStretch™ Flashing that is at
least 12 inches longer than the width of the window opening.
7B.3 INSTALLATION OF SILL FLASHING
Remove the interior section of the split release paper and adhere the sill flashing piece to the
rough opening sill as shown, allowing for about 6 inches of flashing up each side of the window.
(Optional: Leave a 1-inch area at the back of the sill for installation of a back dam.)
7B.4 WINDOW JAMB FLASHING
Use fasteners (cap nails, screws, or roofing nails) to ensure adequate attachment of the
flashing as shown. Use GreenGuard® Butyl Flashing to wrap the inside of the jambs of the
rough opening and on to the wall face. The jamb flashing should overlap the sill flashing by
at least 2 inches.
Figure 7B.3 INSTALLATION OF SILL FLASHING
Figure 7B.4 WINDOW JAMB FLASHING
Figure 7B.1 PREPARATION OF ROUGH OPENING
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Figure 7B.2 PREPARATION OF WINDOW SILL