Installation Guide
Copyright ©2016 E. I. du Pont de Nemours and Company. All Rights Reserved. K27349 Version 4/16 13
Installation of Integral Flanged Windows in Recessed Openings
Before Water-Resistive Barrier (WRB) Is Installed
B-7 Install DuPont
™
Flashing Tape at Jambs
A. Cut a piece of DuPont
™
Flashing Tape that is 2" LONGER than the length of the
outer jamb (J).
B. Fold the DuPont
™
Flashing Tape lengthwise using the measurements (X, Y and Z)
shown in Table 2 below, creating sharp creases to help achieve sharp corners
when release paper is removed.
D. Remove the first piece of release paper to expose the butyl that will be installed
onto the window flange by tearing along the crease. Leave the release paper on
the 2" flap created in Step C. Do not cut release paper with sharp object as this
could result in damage to butyl and compromise protection provided by the
DuPont
™
Flashing Tape.
E. Starting at top of window, adhere exposed butyl adhesive onto window flange.
F. Remove the release paper from the corner flap in the DuPont
™
Flashing Tape,
created in Step C, and adhere the flap to the sill.
NOTE: Keeping the remaining release papers intact will make the flashing more rigid to
help maneuver the flashing into the corners.
G. Once the butyl is adhered to the window flange and sill, remove the center release
paper – leaving the release paper on the 2" flap created in Step C. The flashing
can now be adhered to the inside edge of the rough opening.
H. Remove the release paper from the
second corner flap and adhere over
the first flap.
I. Remove the remaining release paper
and adhere the DuPont
™
Flashing
Tape onto the face of the wall and
onto the DuPont
™
Tyvek
®
WRB.
J. Apply DuPont™ Residential Sealant,
or recommended sealant, to the
interfaces as shown at right.
K. Repeat Steps A-J for opposite jamb.
E
F
H
I
J
G
J
BB
C
A
C. Starting at the bottom, cut a 2"
vertical slit in the DuPont
™
Flashing
Tape along each crease. This will be
used to create the DuPont
™
Flashing
Tape corner that is created in Steps
F and G shown below.
NOTE: Cut the first crease from the left
edge of the DuPont
™
Flashing Tape when
preparing to apply to the right-hand jamb
or the first crease from the right when
preparing for the left-hand jamb.
Table 2: Jamb Flashing for Shallow Recessed Flanged Window Condition
X Y Z
6" DuPont
™
Flashing Tape (single stud) 2" 1" 3"
6" DuPont
™
Flashing Tape (single stud) 2" 2" 2"
6" DuPont
™
Flashing Tape (double stud) 2" 2" 2"
9" DuPont
™
Flashing Tape (double stud) 3" 3" 3"
9" DuPont
™
Flashing Tape (double stud) 3" 4" 2"