Installation Guide
Copyright ©2016 E. I. du Pont de Nemours and Company. All Rights Reserved. K27349 Version 4/16 18
Installation of Integral Flanged Windows in Recessed Openings
Before Water-Resistive Barrier (WRB) Is Installed
Technical Specifications
DuPont
™
Tyvek
®
WRBs used in construction products are made from 100% flash spunbonded
high density polyethylene fibers which have been bonded together by heat and pressure,
without binders or fillers, into a tough durable sheet structure. Additives have been incorporated
into the polyethylene to provide ultraviolet light resistance. DuPont requires that DuPont
™
Tyvek
®
CommercialWrap
®
and CommercialWrap
®
D be covered within nine months (270 days) of
installation and that all other DuPont
™
Tyvek
®
WRB’s be covered within 4 months (120 days) of
installation.
DuPont
™
self-adhered flashing products are made from a synthetic rubber adhesive and a laminate of
polyethylene film, polypropelene film, elastic fiber, synthetic rubber adhesive, polyurethane adhesive,
and a top sheet of flash spunbonded high density polyethylene fibers or polypropelene film. Additives
have been incorporated into these materials to provide ultraviolet light resistance. DuPont requires
that DuPont
™
FlexWrap
™
NF, and StraightFlash
™
be covered within nine months (270 days) of
installation. DuPont requires that DuPont™ Flashing Tape be covered within four months (120 days)
of installation.
Warning
DuPont
™
Tyvek
®
WRBs are slippery and should not be used in any application where they
will be walked on. In addition, because they are slippery, DuPont recommends using
kickjacks, scaffolding, or lifts for exterior work above the first floor. If ladders must be used,
extra caution must be taken to use them safely by following the requirements set forth in
ANSI Standards 14.1, 14.2, and 14.5 for ladders made of wood, aluminum, and fiberglass,
respectively. DuPont
™
Tyvek
®
products are combustible and should be protected from
flames and other high heat sources. DuPont
™
Tyvek
®
products will melt at 275°F (135°C) and
if the temperature of DuPont
™
Tyvek
®
reaches 750°F (400°C), it will burn and the fire may
spread and fall away from the point of ignition. For more information, call 1-800-44-Tyvek.
DuPont
™
self-adhered flashing products and their release paper are slippery and should not
be walked on. Remove release paper from work area immediately. DuPont
™
self-adhered
flashing products will melt at temperatures greater than 250°F (121°C). DuPont
™
self-
adhered flashing products are combustible and should be protected from flames and other
high heat sources. DuPont
™
self-adhered flashing products will not support combustion if
the heat source is removed. However, if burning occurs, ignited droplets may fall away from
the point of ignition. For more information, call 1-800-44-Tyvek.
DuPont
™
Residential Sealant is irritating to skin, eyes, and respiratory tract. For proper
usage, follow directions stated on the product label. For health information, refer to the
Material Safety Data Sheet or call Chemtrec at 1-800-424-9300.
Note
When installed in conjunction with other building materials, DuPont
™
self-adhered flashing products
must be properly shingled with these materials such that water is diverted to the exterior of the
wall system. DuPont
™
Tyvek
®
products are air and water barriers and not the primary water barrier.
The outer facade is the primary barrier. You must follow facade manufacturer’s installation and
maintenance requirements for all facade systems in order to maintain water holdout properties and
ensure performance of DuPont
™
Tyvek
®
WRBs. Use of additives, coatings or cleansers on or in the
facade system may impact the performance of DuPont
™
Tyvek
®
WRBs. DuPont
™
Tyvek
®
Weatherization Systems products are to be used as outlined in this installation guideline. DuPont
™
self-adhered flashing products should only be used to seal penetrations and flash openings in
houses or buildings. DuPont
™
self-adhered flashing products are not to be used in roofing
applications. For superior protection against bulk water penetration, DuPont suggests a system
combining a quality exterior facade, a good secondary air and water barrier and exterior sheathing,
high quality windows and doors, and appropriate flashing materials paying attention to proper
installation of each component. In a system where no exterior sheathing is used and DuPont
™
Tyvek
®
WRBs are installed directly over the wall studs, exterior facade materials should be
selected to ensure maximum protection against water intrusion. Careful workmanship and proper
installation of each component is very important.
DuPont believes this information to be reliable and accurate. The information may be subject to
revision as additional experience and knowledge is gained. It is the user’s responsibility to determine
the proper construction materials needed.
For complete warranty information please visit www.weatherization.tyvek.com or call
1-800-44-Tyvek.
This information is not intended to be used by others for advertising, promotion, or other
publication for commercial purposes.