Installation Instructions

9”
9” min
9” min
8 1/2” min
8 1/2” min
8 1/2” min
8 1/2” min
8 1/2” min
8 1/2” min
Approx 10”
Approx 10”
figure A
figure B
figure D figure E figure F
figure
C
Installing accessories
Windows, doors and roof lines flashing
The following instructions should be followed when applying window flashing
to an existing window:
● Apply a continuous bead of sealant adjacent to the sill of the existing window.
For windows with nailing flanges, the sealant should be applied to the nailing
flange in a manner that covers the nails and nail slots (figure A).
● Apply a minimum of 9” wide horizontal sill flashing level with the bottom edge of
the existing window by pressing the flashing into the sealant bead at its top edge.
● Cut the sill flashing long enough to extend a minimum of 9” beyond each jamb.
● Fasten the sill flashing at the bottom and side edges (figure B).
● Apply a continuous bead of sealant adjacent to the side jambs of the window.
For windows with nailing flanges, the sealant should be applied to the nailing
flange in a manner that covers the nails and nail slots.
● Continue the bead of sealant at the jambs vertically a minimum of 8 1/2” above the
head of the window to allow for bedding the top portion of the jamb flashing into
sealant in the next step (figure C).
● Install the jamb flashing by pressing the flashing into the sealant beads at the win-
dow jambs. Extend the bottom edge of the jamb flashing approximately 1/2” short
of the sill flashing edge, and extend the top edge approximately 8 1/2” beyond the
head of the window, where the head flashing will be placed next (figure D).
● Fasten the jamb flashing along the edges further most from the window.
● Apply a continuous bead of sealant adjacent to the head of the installed window.
For windows with nailing flanges, the sealant should be applied to the nailing
flange in a manner that covers the nails and nail slots (figure E).
● Install the head flashing by pressing the bottom edge of the flashing into the seal-
ant bead previously applied across the mounting flange.
● Extend the ends of the head flashing approximately 10” beyond the jamb flashing
at each end. Fasten the head flashing into place along the top edge (figure F).
Note:
Sealant should be compatible with window, flashing, and weather resistant barrier
materials. Contact sealant manufacturer for job-specific recommendations.
Flashing new window installations
Refer to window manufacturer’s instructions and ASTM E2112, Standard Practice
for Installation of Exterior Windows, Doors and Skylights for the proper flashing
installation method for the window type and wall configuration on the project.
Installing Accessories 2