Copyright ©2012 E. I. du Pont de Nemours and Company. All Rights Reserved. Rev. 2/12 12
DuPont
™
Tyvek
®
Water-Resistive and Air Barriers Installation Guidelines
Key Installation Requirements for Wraps
Continuity
It is important to maintain the continuity of the WRB throughout the building envelope.
The entire wall surface shall be wrapped, including unconditioned spaces. Special
attention should be given to ensure a proper 6’’ overlap at all terminations, seams,
penetrations, and transitions to maintain a continuous downward drainage plane and
WRB. Installing the DuPont
™
Tyvek
®
WRB as an air barrier is the preferred installation
method, but when the DuPont
™
Tyvek
®
WRB is being installed as a water-resistive
barrier only (residential/low-rise), then skip-taping terminations and untaped horizontal
seams is allowed. All vertical seams must be taped for both air barrier and water-
resistive barrier installations.
Penetrations
Seal the DuPont
™
Tyvek
®
Products around all penetrations (electrical, HVAC and
plumbing, etc.) with the appropriate DuPont
™
Flashing Systems product, DuPont
™
Tyvek
®
Tape, DuPont
™
Residential Sealant, DuPont
™
Commercial Sealant, or
recommendedsealant.Productsthathaveangesshouldbeintegratedintothe
DuPont
™
Tyvek
®
WRB. DuPont
™
StraightFlash
™
, DuPont
™
Flashing Tape or DuPont
recommended alternate patches should be applied behind fastening plates (brick tie
base plates, metal fastening clips, metal channels, etc.) when building envelope design
requirements exceed ASTM E1677, 65 mph equivalent structural load and 15 mph
equivalent wind-driven rain water infiltration resistance. Please contact 1-800-44-Tyvek
for recommended sealants and recommended alternate patches behind fastening plates.
Overlap
Ensure proper shingling with a 6’’ minimum overlap of the WRB components from the
bottom to the top of the wall to help facilitate proper drainage.
Fasteners
Use DuPont fasteners or DuPont recommended alternates per the fastening schedule
included in this installation guideline. Temporary fasteners should not be relied upon to
permanently attach DuPont
™
Tyvek
®
WRBs due to the limited holding power of these
fastening methods, and will not be in compliance with the DuPont
™
Tyvek
®
Water-
Resistive and Air Barriers Installation Guidelines. If temporary fasteners are used,
permanent fastening must be applied as soon as practically possible in order to maintain
the integrity and performance of the DuPont
™
Tyvek
®
WRB. Refer to the DuPont
™
Tyvek
®
Weather Barrier Commercial Installation Guidelines, for more complete fastening
information.Examplesofrecommendedpermanentfastenersinclude:
• DuPont
™
Tyvek
®
Wrap Cap nails (for wood frame construction)
• DuPont
™
Tyvek
®
Wrap Cap Staples for Stinger
™
(for wood frame construction)
• 1.0inchminimumcrownstaplesforresidential/lowriseconstruction(except
when installing DuPont
™
Tyvek
®
WRB over foam sheathing)
• 1”plasticcapstaplewithleglengthsufcienttoachieve5/8”penetrationinto
wood stud (for wood frame construction)
• DuPont
™
Tyvek
®
Wrap Cap 2” plastic cap screws (for steel or wood frame
construction)
• 1-1/4”metalgasketedwasherswithscrews(forsteelframeconstruction)
• 2”metalgasketedwasherswithscrews(forsteelframeconstruction)
• Tapcon
®
fasteners with 2’’ plastic caps (for masonry construction)
Special Considerations
Refer to the Technical Specification section for composition, UV exposure, surface
burning characteristics, and other special considerations.
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