Installation Guide

Copyright ©2016 E. I. du Pont de Nemours and Company. All Rights Reserved. K27349 Version 4/16 11
Installation of Integral Flanged Windows in Recessed Openings
Before Water-Resistive Barrier (WRB) Is Installed
B-4 Install DuPont
™
Flashing Tape at Sill
A. Cut the DuPont
™
Flashing Tape the length of the outer sill (S). Refer to Table 1
below to determine which width of DuPont™ Flashing Tape to use.
B. Fold the DuPont
™
Flashing Tape lengthwise using the measurements (X, Y and Z)
shown in Table 1, creating sharp creases to help achieve sharp corners when
release paper is removed.
C. Remove the center piece of release paper by carefully tearing along the creases.
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.
D. Adhere exposed butyl to sill.
E. Unfold unadhered flashing, remove remaining pieces of release paper and adhere
butyl adhesive onto the face of the recessed window frame and onto the DuPont
™
Tyvek
®
WRB.
S
X
X
Y
Y
Z
Z
A
E
E
Table 1: Sill/Head 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"
B-5 Install DuPont
™
FlexWrap
™
NF in Rough Opening at Sill
A. Cut FlexWrap
™
NF at least 12" LONGER than width of inner/recessed sill (S
1
).
NOTE: Use 6” wide DuPont™ FlexWrap
™
NF for 2”x 4” framing and 9” wide DuPont
™
FlexWrap
™
NF for 2” x 6” framing.
B. Remove wide piece of release paper. Cover horizontal sill by aligning inside edge
of sill, and adhere into rough opening along sill and up jambs (min. 6" on each side).
C. Remove narrow release paper.
D. Fan out FlexWrap
™
NF at bottom corners onto face of recessed window framing.
Coverage of FlexWrap
™
NF should be a minimum of 2" onto the face of the
recessed window frame, extending beyond into the recess if necessary.
FRONT VIEW CORNER DETAIL
No Gap in Corner
WRONG CORRECT
Window Jamb
DuPont
™
FlexWrap
™
NF
Sill
S
1
6” Minimum