GreenGuard Residential Building Wraps - Manual (Page 3)

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4. At window rough openings, cut the building wrap using a modified “I”
pattern, folding excess material to the inside of the opening and fasten to
studs (see Figure 3). Alternative details for installing building wrap at rough
openings are shown in sections 5A and 5B of this Guide. Use of GreenGuard
®
Flashing Products is optional unless the building wrap is intended to perform
as the primary air barrier material in the wall assembly. In this case,
GreenGuard
® Butyl Flashings or other butyl self-adhering flashing approved by
Pactiv Building Products must be used.
5. When the end of a roll is reached, firmly attach the loose end of the building
wrap to a stud or structural sheathing. Seams must be overlapped a minimum
of 6 inches for vertical seams and 2 inches for horizontal seams. The upper
courses of building wrap must overlap the lower courses in shingle fashion.
Sealing of building wrap seams using GreenGuard® Seam Tape (Standard or
Custom) or other sealing method approved by Pactiv Building Products is
optional unless the building wrap is intended to perform as the primary air
barrier. In this case, the seams must be sealed using 3 inch wide
GreenGuard
® Seam Tape (Custom) or other tape approved by Pactiv.
GreenGuard® Building Wraps that are recognized as air barrier materials may be
installed as the primary air barrier material in a wall assembly by sealing around all
windows, doors and wall penetrations. Other air barrier applications may include
knee wall backing, exterior walls of chimney structures, exterior walls of tub/shower
enclosures, etc.
6. Many common adhesives and sealants are compatible with GreenGuard®
Building Wrap and GreenGuard® Flashing products. For more information
regarding adhesives, sealants+ and primers for use with GreenGuard® Building
Wrap and GreenGuard® Flashing products, go to www.TrustGreenGuard.com and
look for the applicable Technical Bulletin under “Product Literature.”
G U I D E F O R R E S I D E N T I A L A P P L I C A T I O N S
FIGURE 3: EXAMPLE OF MODIFIED “I” CUT AT A WINDOW OPENING