Instructions / Assembly

Copyright ©2016 E. I. du Pont de Nemours and Company. All Rights Reserved. K27340 Version 4/16 8
Installation of Integral Flanged Windows in Recessed Openings
After Water-Resistive Barrier (WRB) Is Installed
DuPont
™
Self-Adhered Flashing Systems Products – Installation
Guidelines for up to 4" Recess Using Single and Double Stud
Window Framing
B-1 Prepare DuPont
™
Tyvek
®
WRB for Window Installation
A. Wrap wall as shown in DuPont™ Tyvek® Water-Resistive and Air Barriers
Installation Guidelines for Buildings Less Than 5 Stories that can be found at www.
weatherization.tyvek.com. Do not install fasteners within 6” of the sills and jambs
of the openings and within 9” of the head of the openings.
B. Make a cut in the DuPont™ Tyvek® WRB along the perimeter of the rough
opening. Ensure that the DuPont™ Tyvek® WRB is cut flush with the sheathing
and is not wrapped into the rough opening.
C. Cut two 45 degree slits extending a minimum of 8" from the corner of the window
head, up and away from the window opening. This will create a flap above the
rough opening to expose sheathing or framing members to allow head flashing
installation.
D. Flip head flap up and temporarily secure with DuPont
™
Tyvek
®
Tape.
NOTE: In lieu of temporarily taping, the DuPont
™
Tyvek
®
flap at the window head can be
tucked under the DuPont
™
Tyvek
®
WRB frame.
8”
A
B
C
D
B-2 Install DuPont
™
FlexWrap
™
NF Recessed Window Corner at Sill
A. Place FlexWrap
™
NF Recessed Window Corner into corner of recess so exposed
butyl is against face of recessed window frame and adhere.
NOTE: For double stud window frames, the FlexWrap
™
NF Recessed Window Corner
should extend a minimum of 2" onto the face of the recessed window frame and cover
the seams between the studs. For single stud window frames, the FlexWrap
™
NF
Recessed Window Corner extending slightly beyond the face of the stud can be fully
adhered into framing.
B. Remove remaining release paper.
C. Adhere exposed butyl to sill and jamb surfaces of recess.
D. Fan FlexWrap
™
NF at bottom corners onto DuPont
™
Tyvek
®
WRB on face of wall.
Coverage of FlexWrap
™
NF should be 2" to 3" onto the face of the wall.
E. Place a bead of DuPont
™
Residential Sealant or recommended sealant behind the
loose triangular flap within the FlexWrap™ NF Recessed Window Corner.
F. Press down the loose triangular flap onto the sealant.
A
D
E
F