JELD-WEN JII001 Vinyl Windows with Integral Nailing Fin User Manual
Page 4
45°
INSTALLATION INSTRUCTIONS
for Vinyl Windows with Integral Nailing Fin (JII001)
4
PREPARE STUD-FRAMED WALL
PREPARE BUILDING WRAP
Note!
Check with the building
wrap manufacturer to verify
the following steps will not
void their product warranty.
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/SHIM THE 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 measurement
A + B + 1 3/4".
3. Measure the width of the
frame from the interior to
the nail fin (measurement A)
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".
Measure
frame
width
A
B
Interior
Width of
rough opening
12"
Continuous
support
Depth of
window
minus 1/4"
Flashing
Nail fin position
2" min.
4
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. Mechanically
fasten if necessary.
8. Smooth out any bubbles
or creases with a J-roller.
Remove and replace if
necessary.
9. Install the continuous
support as follows:
Note!
Where the window will
sit on the sill, shim to provide
continuous support to the
sill. This shimming 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.
10. Align the shimming 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 shimming and tack into place or
secure with sealant.