Installation Guide

PREPARE STUD-FRAMED WALL
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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-adhered 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" (Fig. A).
3. Measure the width of the frame from the interior to the nail n/trim
(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 (Fig. B).
4. Cut a piece of ashing the length of the sill plus 12" (Fig. B).
Measure
frame
width
A
B
Interior
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 wall. 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 a minimum of the width of the
window frame and a minimum of 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, shim under the
mull joint(s) and tack into place or secure with sealant.
Width of
rough opening
12"
Continuous
support
Depth of
window
minus 1/4"
6"
6"
Flashing
Nail n position
2" min.
45°
FIg. A FIg. B
Installation Instructions
for Wood/Clad Wood Windows with Exterior Trim or Nail Fin (JII024)
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