Installation Guide
Copyright ©2016 E. I. du Pont de Nemours and Company. All Rights Reserved. K27349 Version 4/16 4
Installation of Integral Flanged Windows in Recessed Openings
Before Water-Resistive Barrier (WRB) Is Installed
Required Materials Based on Project Requirements, Details,
and Specifications
PRODUCT
DuPont
™
Tyvek
®
Tape
DuPont
™
Tyvek
®
Wrap Cap Fasteners or recommended fastening system
DuPont
™
Window & Door Foam
DuPont
™
Residential Sealant, or other recommended sealant*
DuPont
™
Adhesive/Primer
Backer Rod
Brushes for Surface Preparation
J-Roller
Apply per manufacturers’ guidelines. For non DuPont products, DuPont assumes no liability in use of
recommended products; installers need to evaluate suitability of recommended products in their end-use
applications.
Warranty
Please refer to the DuPont Weatherization Products 10-Year Limited Warranty for
Buildings Less Than 5 Stories and Low-Rise Multi-Family Residential Buildings Less
Than 6 Stories.
NOTE: In order to make a claim under the DuPont Weatherization Products 10-Year
Limited Product and Labor Warranty, you must have met all of the terms and conditions
of the warranty, including use of the applicable DuPont Installation Guidelines. In the
event that a specific detail or installation technique is not covered in the DuPont
Installation Guidelines at the time you are building, then the Key Installation
Requirements outlined in this document must have been followed in order to make a
claim under the warranty. It is in the sole discretion of DuPont to determine if full
compliance with the Key Installation Requirements exists. Please contact DuPont or a
DuPont
™
Tyvek
®
Specialist if you have any questions regarding any DuPont Installation
Guideline.
General Instructions
These installation guidelines are intended for buildings less than 5 Stories and
low-rise multi-family residential buildings less than 6 stories when performance
requirements do not exceed ASTM E1677 (65 mph equivalent structural load and 15
mph equivalent wind-driven rain water infiltration), and window/door design ratings that
do not exceed DP45.
DuPont
™
self-adhered flashing systems products should be installed on clean, dry
surfaces that are free of frost. Wipe surfaces to remove moisture, dirt, grease and other
debris that could interfere with adhesion.
Apply pressure along entire surface of flashing for a good bond using firm hand pressure,
J-roller, or alternate tool without sharp edges (such as a plastic carpet tuck tool) to assist
with application of uniform pressure during installation of DuPont™ self-adhered flashing
systems products.
Remove all wrinkles and bubbles that may allow for water intrusion by smoothing
surface and repositioning as necessary.
When flashing the sill area for windows and doors, DuPont recommends the use of 6”
wide DuPont
™
FlexWrap
™
NF for 2”x 4” framing and 9” wide DuPont
™
FlexWrap
™
NF
for 2” x 6” framing. As an option, if a rigid back dam is desired, cut the corner back dam
the length of the sill and nail into place on the interior edge of the sill prior to installation
of DuPont
™
FlexWrap
™
NF. Then install DuPont
™
FlexWrap
™
NF over sill and corner
guard back dam. If using 6” DuPont
™
FlexWrap
™
NF with optional rigid back dam, seal
ends of corner guard with DuPont
™
Residential Sealant or recommended sealant.
Door and window rough sill framing must be level or slightly sloped to the exterior to
ensure proper drainage to the exterior. This best practice ensures continuous support
with positive slope to the exterior.
DuPont
™
self-adhered flashing systems products are not intended for through-
wall flashing applications.
DuPont
™
Residential Sealant should be tooled flat to allow the natural curing process to
create a concave joint.
Please contact your local DuPont
™
Tyvek
®
Specialist for additional information and
installation support.