Specification

Project Name/Project Number/26-Aug-15 07 65 00 (Masonry Accessories) Flexible Flashing
DuPont™ Thru-Wall Flashing
© 2009 DuPont. DuPont™, and all products denoted herein with ™ or ® are trademarks or registered trademarks of E.I.
du Pont de Nemours and Company. All rights reserved.
B. Cover horizontal sill by aligning DuPont
™
FlexWrap
™
or DuPont
™
FlexWrap
™
NF edge with inside edge
of sill. Adhere to rough opening across sill and up jambs a minimum of 6 inches. Secure flashing tightly
into corners by working in along the sill before adhering up the jambs.
C. Fan DuPont
™
FlexWrap
™
or DuPont
™
FlexWrap
™
NF at bottom corners onto face of wall. Firmly press
in place. Mechanically fasten fanned edges. Mechanical fastening is not required for DuPont
™
FlexWrap
™
NF.
D. On exterior, apply continuous bead of sealant to wall or backside of window mounting flange across
jambs and head. Do not apply sealant across sill.
E. Install window according to manufacturer’s instructions.
F. Apply 4-inch wide strips of DuPont
™
StraightFlash
™
at jambs overlapping entire mounting flange.
Extend jamb flashing 1-inch above top of rough opening and below bottom edge of sill flashing.
G. Apply 4-inch wide strip of DuPont
™
StraightFlash
™
as head flashing overlapping the mounting flange.
Head flashing should extend beyond outside edges of both jamb flashings.
H. Position weather barrier head flap across head flashing. Adhere using 4-inch wide DuPont
™
StraightFlash
™
over the 45-degree seams.
I. Tape head flap in accordance with manufacturer recommendations
J. On interior, install backer rod in joint between frame of window and flashed rough framing. Apply
sealant around entire window to create air seal. Apply sealant in accordance with sealant
manufacturer’s instructions and ASTM C 1193.
(Specifier Note: When project conditions dictate that weather barrier will be installed after the windows and
doors have been installed, USE the following Flashing Article.)
3.6 FLASHING (for use with flanged windows installed before weather barrier)
A. Attach weather barrier membrane apron under sill. Extend apron a minimum of 10 inches beyond sides
of rough opening, and below the rough opening to overlap the sill plate or the weather barrier below.
Securely attach sides of apron to wall, leaving bottom free to overlap later weather barrier installation.
B. Cut DuPont
™
FlexWrap
™
or DuPont
™
FlexWrap
™
NF a minimum of 12 inches longer than width of sill
rough opening.
C. Cover horizontal sill by aligning DuPont
™
FlexWrap
™
or DuPont
™
FlexWrap
™
NF edge with inside edge
of sill. Adhere to rough opening across sill and up jambs a minimum of 6 inches.
D. Fan DuPont
™
FlexWrap
™
or DuPont
™
FlexWrap
™
NF at bottom corners onto face of wall. Firmly press
in place. Mechanically fasten fanned edges. Mechanical fastening is not required for DuPont
™
FlexWrap
™
NF.
E. On exterior, apply continuous bead of sealant to wall or backside of window mounting flange across
jambs and head. Do not apply sealant across sill.
F. Coordinate with window installation.
G. Complete flashing after installation of window/door
1. Apply 4-inch wide strips of DuPont
™
StraightFlash
™
at jambs overlapping entire mounting flange.
Extend jamb flashing 1-inch above top of rough opening and below bottom edge of sill flashing.
2. Apply 4-inch wide strip of DuPont
™
StraightFlash
™
as head flashing overlapping the mounting flange.
Head flashing should extend beyond outside edges of both jamb flashings.
3. Position weather barrier head flap across head flashing. Adhere using 4-inch wide DuPont
™
StraightFlash
™
over the 45-degree seams.
4. Tape head flap in accordance with manufacturer recommendations.