Installation Instructions

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 ush
with the rough opening.
2. At the head, cut building
wrap at 45° and tape up as
shown.
3. Trim the sides sufciently
to allow the nailing n to
be mounted against the
sheathing.
PREPARE/SHIM THE SILL
1. Use self adhesive ashing to
waterproof the sill.
2. Flashing must have at least
2" of visible material below
nail n. 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 n (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 ashing will sit.
4. Cut a piece of ashing 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 n position
2" min.
4
5. Place ashing on rough
opening sill, wrapping the
ashing up 6" on each jamb
as shown.
6. Pull release tape and set
ashing into place.
7. Fold the ashing 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 ush 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.