Installation Guide

Copyright ©2016 E. I. du Pont de Nemours and Company. All Rights Reserved. K27349 Version 4/16 15
Installation of Integral Flanged Windows in Recessed Openings
Before Water-Resistive Barrier (WRB) Is Installed
B-10 Secure Upper Flap
A. Flip down upper flap of DuPont
™
Tyvek
®
WRB so it lays flat across head flashing.
B. Cut ~1" strip of the DuPont
™
Tyvek
®
WRB at lower horizontal edge of head flap.
C. Continuous tape seams as shown with DuPont
™
Flashing Tape. Skip-taping at head
is acceptable if an air barrier is not required or if additional drainage is desired.
D. Install mechanical fasteners through the flashing at the head flap.
A
D
C
B-11 Seal Interior Opening
Install DuPont
™
Residential Sealant or recommended sealant (and backer rod as
necessary) around the window opening at the interior. It is also acceptable to use
DuPont
™
Window & Door Foam or recommended foam at the interior cavity of the
jambs and head. If foam is used at the sill, recommended sealant should be used at the
sill area behind the foam to ensure a proper water seal. The seal created by the sealant
(and backer rod as necessary) will also serve as a back dam. DuPont
™
Residential
Sealant should be tooled flat to allow the natural curing process to create a concave
shape. Be sure that the sealant penetrates the grooves of the DuPont
™
FlexWrap
™
N F.
Interior