JELD-WEN JII031 Aluminum Windows without Nailing Fin - Manual (Page 4)

INSTALLATION INSTRUCTIONS
for Aluminum Windows without Nailing Fin (JII031)
4
PREPARE STUD-FRAMED WALL
4
FOR RETROFIT INSTALLATIONS
After removing the old window,
remove sufficient siding to
expose enough intact building
wrap to properly seal the
window to the opening. If
damaged, apply new building
wrap in shiplap manner. Verify
the rough opening framing is
structurally sound. Continue
with the instructions.
PREPARE BUILDING WRAP
Note! Check with the building wrap manufacturer to verify the
following steps will not void their product warranty. Follow
manufacturers' instructions.
1. Trim building wrap flush with
the rough opening.
2. At the head, cut building
wrap at 45° and tape up as
shown.
3. Trim the sides sufficiently
to allow the nailing fin to
be mounted against the
sheathing.
PREPARE SILL
1. Use self adhesive flashing to waterproof the sill.
2. Flashing must have at least 2"
of visible material below nail
fin. Flashing width must be at
least frame width + 1 3/4".
3. Measure the width of the
frame and subtract 1/4".
Transfer this measurement
from the outside edge of the
rough opening sill and draw
a line all along the rough
opening sill. This is where the
back of the flashing will sit.
4. Cut a piece of flashing the
length of the sill plus 12".
5. Place flashing on rough
opening sill, wrapping the
flashing up 6" on each jamb
as shown.
6. Pull release tape and set
flashing into place.
7. Fold the flashing down onto
the sheathing. Staple flashing
to the wall and seal the corner
edges as shown.
8. Smooth out any bubbles or
creases with a J-roller.
9. Install the continuous shim as
follows:
Note! The continuous shim
must be 1/2" shorter than the width of the window frame, be 1/4"
narrower than the depth of the window frame sill, should level the
rough opening sill and be no more than 1/4" thick.
Align the shim on the sill flush
with the exterior and centered
between the side jambs. If
installing a mulled unit, leave
gaps at the mull joint(s) so
they don't sit on the shim and
tack into place or secure with
sealant.
45°
Interior
Width of
rough opening
12"
Continuous
support
Depth of
window
minus 1/4"
Flashing
Measure
frame
width