JELD-WEN JII032 Wood Bay or Bow Windows with Nailing Fin or Exterior Trim User Manual
Page 3
INSTALLATION INSTRUCTIONS
for Wood Bay & Bow Windows with Nailing Fin or Exterior Trim (JII032)
3
Note!
This section
applies to installations
into a masonry wall
only. For installations
into a stud-framed
wall, begin with
section 4, “PREPARE
STUD-FRAMED
WALL.”
1. Seal any joint larger
than 1/16" in the
buck and between
the buck and the
concrete/masonry
with sealant.
INSPECT ROUGH OPENING
2
• Verify the width
and height of the
window are each
1/2" - 5/8" smaller
than the rough
opening width and
height.
A
B
D
C
E
• Verify the rough opening is square. The (A) and (B) measurements
above should be the same. Maximum allowable deviation from square
for windows over 20 sq. ft. is 1/4" and for windows under 20 sq. ft.
is 1/8".
• Verify the rough opening is level and plumb (C) and (D). The
maximum allowable deviation is 1/8".
• The rough opening sill must not be crowned or sagged (D). A 5
degree
sloped sill is recommended.
• Verify the exterior face of the rough opening is a single plane (E) with
less than 1/8" twist from corner to corner.
• Verify the rough opening is structurally sound.
• Correct any deviations before installing the window.
PREPARE BUCK
3
2. Cover the buck and the surrounding concrete/masonry at the head
and jambs with liquid applied flashing as shown.
3. If installing into a four-sided buck: Seal the sill in a similar manner.
Note!
Shims must be 1/4" shorter than the depth of the window sill,
should level the rough opening sill and be no more than 1/4" thick.
4. Shim the sill 4" from each corner, at 8" intervals, and underneath
mull joints on both sides with non water-degradable or compressible
shims. Secure shims with sealant. SKIP to section 5, “PREPARE
WINDOW.”
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.
45°
Sealant
joints
Liquid
applied
flashing