IMPORTANT INFORMATION & GLOSSARY
INSTALLATION INSTRUCTIONS
for Wood Bay or Bow Windows with Nailing Fin
or Exterior Trim (JII032)
Thank you for selecting JELD-WEN products. Attached are JELD-WEN’s
recommended installation instructions for wood and clad wood
bay and bow windows. Read these instructions thoroughly before
beginning. They are designed to work in most existing applications,
however; existing conditions may require changes to these
instructions. If changes are needed, they are made at the installer’s
risk. For installations other than indicated in these instructions, contact
a building professional.
Newer construction methods have led to an increase in air and water
tightness in buildings. This frequently leads to negative air pressure
inside the home, which can draw water through very small openings.
Our installation method seals the window with the weather barrier
(typically building wrap).
Not all window types may be installed into every wall condition in all
areas. Consult your local building code ofcial for applicable building
codes and regulations. Local building code requirements supersede
recommended installation instructions.
Note! Installations where the sill is higher than 35 feet above ground
level, or any product installation into a wall condition not specically
addressed in these instructions, must be designed by an architect or
structural engineer.
Failure to install windows into square, level, and plumb openings could
result in denial of warranty claims for operational or performance
problems.
Note to Installer: Provide a copy of these instructions to the building
owner. By installing this product, you acknowledge the terms and
conditions of the limited warranty as part of the terms of the sale.
1 hr
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11
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10
9
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8 4
7 5
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Estimated Install
Time for New
Construction
First Time: 2 hrs
Experienced: 1.5 hrs
Professional:
ROUGH OPENINGS
This installation guide specically addresses masonry/block wall, sheathed
wall and open-stud construction. Windows without an integral head
and seat board must be placed on a structure that provides continuous
support to the sill.
MASONRY/BLOCK WALL CONSTRUCTION
This installation
assumes that a
framework of studs
(often called a buck)
has already been
properly fastened and
sealed to the concrete/
masonry wall by a
building professional.
Masonry
Wall
Buck
GLOSSARY
Backer Rod (backing material)
A material (e.g. foam rod), placed into a joint primarily to control the
depth of the sealant.
Buck
A wood framework attached to the masonry inside a window or patio
door rough opening.
Mulled Unit
Two or more window units structurally joined together.
Mull Joint
The joint where two or more window units are structurally joined
together.
Precast Sill
A pre-formed concrete block placed in the sill of a masonry/block wall
to support a window.
Shiplap
The layering method in which each layer overlaps the layer below it so
that water runs down the outside.
FULLY SHEATHED WALL CONSTRUCTION
The wall framing is
covered by sheathing.
Windows will be
Sheathed
Wall
Header
mounted ush against
the sheathing. This
installation assumes
building wrap is
properly installed
King
stud
Trimmer
studs
Sheathing
prior to installation.
OPEN-STUD CONSTRUCTION
The wall framing must be covered by backing support before the
window can be installed. The window will be mounted with the nailing
n/exterior trim ush against the applied backing support.
This backing support should be a non water-degradable, thin (max.
1/8" thick) sheet material such as vinyl sheeting. Completely surround
the rough opening with the backing support. Backing support must be
applied before building wrap.
SAFETY & HANDLING
INSTALLATION INSTRUCTIONS
for Wood Bay & Bow Windows with Nailing Fin or Exterior Trim (JII032)
SAFETY
• Read and fully understand ALL manufacturers’ instructions before
beginning.
• Do not work alone. Two or more people are required. Use safe lifting
techniques.
• Use caution when handling glass. Broken or cracked glass can cause
serious injury.
• Wear protective gear (e.g. safety glasses, gloves, ear protection, etc.).
• Operate hand/power tools safely and follow manufacturer’s operating
instructions.
• Use caution when working at elevated heights.
NEEDED MATERIALS & TOOLS
MATERIALS
Note! Follow all material manufacturers’ instructions for proper use
and compatibility.
• 3" galvanized casing nails (exterior trim windows) or 1 3/4"
galvanized roong nails (nailing n windows). Nails must penetrate at
least 1" into framing (or as required by local code)
• #10 x 2 1/2" corrosion-resistant pan head screws. Screws must
penetrate at least 1" into framing (or as required by local code)
• Non-Compressible or water degradable shims
• Sealant: We recommend OSI® QUAD® Max Sealant or equivalent. This
can be used in any application and can be painted or ordered in a
color matched product, if desired.
• Backer rod 1/8" larger than the widest portion of the gap (used in
conjunction with sealant bead).
• Polyurethane low expansion Window and Door foam: We recommend
OSI® QUAD® Foam or equivalent).
• 4", 6", or 9" (as required by local code and window conguration)
wide self-adhesive ashing: We recommend OSI® QUAD® Butyl
Flashing Tape or equivalent.
• Spray adhesive/primer for self adhesive ashing. Such as Loctite® 300
or equivalent
WINDOW & MATERIALS HANDLING
• Make sure operable windows are closed and locked prior to
installation.
• Heed material manufacturers’ handling and application instructions.
• Protect adhesive surfaces from dirt, moisture, direct sunlight and
folding over onto themselves.
• Handle in vertical position; do not carry at or drag on oor.
• Do not put stress on joints, corners, or frames.
• Store window in dry, well-ventilated area.
• Protect from exposure to direct sunlight during storage.
• Install only into vertical walls and when conditions and materials
aredry.
IF INJURY OCCURS, IMMEDIATELY SEEK MEDICAL ATTENTION!
For installations into a buck:
• Liquid applied ashing (Protecto Wrap LWM 200 or equivalent)
TOOLS
• Utility knife
• J-roller
• Hammer
• Tape measure
• Level (4' minimum
recommended)
• Caulking gun
• Drill with 1/8" tapered bit and
3/8" countersink
1
REMOVE PACKAGING
Remove shipping materials such as corner covers, shipping blocks or
pads. If there is a protective lm on the glass, do not remove it until
installation and construction are complete. Cut off any staple legs
exposed on the side of the frame.
INSPECT YOUR WINDOW
• Cosmetic damage.
• Product squareness (diagonal measurements not more than 1/8"
different).
• Correct product (size, color, grid pattern, handing, glazing, energyefciency requirements, etc.).
REMOVE PACKAGING & INSPECT WINDOW
2
• Splits, cracks, holes, missing sections or other damage to the nailing
n longer than 6" and/or within 1/2" of window frame.
• For units with integral head and seat boards, ensure the top of the
mull joints are covered and sealed with silicone.
If any of the above conditions represent a concern, or if you expect
environmental conditions to exceed the window's performance rating,
do not install the window. Contact your dealer or distributor for
recommendations.
INSTALLATION INSTRUCTIONS
for Wood Bay & Bow Windows with Nailing Fin or Exterior Trim (JII032)
2
• Verify the width
and height of the
window are each
1/2" - 5/8" smaller
than the rough
opening width and
height.
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
PREPARE BUCK
Liquid
applied
ashing
• 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
A
C
B
D
Sealant
joints
E
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.
2. Cover the buck and the surrounding concrete/masonry at the head
and jambs with liquid applied ashing 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.”
4
FOR RETROFIT INSTALLATIONS
After removing the old window, remove sufcient 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 STUD-FRAMED WALL
3
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
ush with the
rough opening.
2. At the head, cut
building wrap at
45° and tape up as
shown.
3. Trim the sides sufciently to allow the nailing n to be mounted
against the sheathing.
45°
INSTALLATION INSTRUCTIONS
for Wood Bay & Bow Windows with Nailing Fin or Exterior Trim (JII032)
4
PREPARE STUD-FRAMED WALL
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
Measure
frame
width
B
A
frame from the interior to
the nail n (measurement
1) and subtract 1/4".
Transfer this measurement
Width of
rough opening
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".
Interior
12"
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. Staple
ashing to the wall and seal
the corner edges as shown.
8. Smooth out any bubbles
or creases with a J-roller.
Remove and replace if
necessary.
9. Install the continuous shim
as follows:
Depth of
window minus
1/4"
Continuous
shim
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
Flashing
Nail n position
2" min.
sill, should level the rough
opening sill and be no more than 1/4" thick.
Align the shim 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 shim and tack into place or secure with sealant.
5
INSTALL WINDOW
Warning! To avoid injury, use at least two people to install. Adequately
support the window until fully installed.
Note! Window should be pre-drilled and countersunk before placing
inside the rough opening.
1. Pilot holes should be
spaced 1 1/2" from interior
edges, 4" from each corner
1 1/2"
and then evenly spaced no
more than 12" around the
inside perimeter. Drill 1/8"
pilot holes and countersink.
2. For units with exterior
trim: run a 3/8" continuous
bead of sealant around
4"
the interior of the window
where the trim meets the
window frame. Tool into a
Countersink
llet shape.
3. Run a continuous 3/8"
bead of sealant around
the interior side of the nail
fin on the side jambs and
head. On the sill, leave at
least a 2" gap every 12")
where it will contact the
rough opening.
4. Place window onto the
shims and tilt into the
rough opening. The
Gap
window sill must rest on
and be supported by the
shims.
5. Fasten window through
the nailing n/trim
between 3" and 7" from
one lower corner.
6. Mill a 2x piece of material
to ll the gap in the jambs
between the framing and
the window.
7. Align side jamb shims with
the pre-drilled holes so
fasteners will penetrate
shims. Shims must be set
back at least 1/4" from the
interior of the jamb. Secure
shims with sealant.
8. Inspect window for square,
level and plumb (adjust
shims or remove and
reinstall if necessary).
9. Using #10 x 3 1/2" pan
head screws, fasten the
jambs, head, and seat
board through the predrilled and countersunk
pilot holes. Screws should
penetrate the previously
installed shims.
Jamb Cutaway from Top
Framing
1/4"
sealant
gap
3"- 7"
Shim
4
INSTALLATION INSTRUCTIONS
v
e
for Wood Bay & Bow Windows with Nailing Fin or Exterior Trim (JII032)
6
FLASH WINDOW - WINDOWS WITH A NAILING FIN INSTALLED INTO STUD-FRAMING ONLY
Cut four pieces of self-adhesive ashing as follows:
• One head board piece 6" longer than the head board
• One header piece 12" longer than the header
• Two side pieces 7" longer than each side
SPRAY ADHESIVE/PRIMER
Apply spray adhesive/primer
as instructed to nailing n,
sheathing and building wrap
at the sides and head as
shown.
6"
APPLY THE SELF-ADHESIVE FLASHING
Note! Keep the edge of the self-adhesive ashing as close to the
window frame as possible and apply over the nail n.
7
COMPLETE INSTALLATION
1. Fold the head board piece
lengthwise into “L” shape.
Center and apply one leg
to head board and the
Cut
other to the wall above the
rough opening header. Cut
the corners to allow the
ashing to lay at against
Fold
down
the wall.
2. Starting 2" above the
i
s
e
h
d
A
y
a
r
p
S
header, apply the side
pieces and overlap the
drain mat on the sill as
shown.
3. Center and apply the
header piece above the
header, overlapping the
2"
2"
6"
side pieces as shown.
4. Press the ashing down
with a J-roller, being
6"
careful to remove any gaps
or bubbles beneath selfadhesive ashing (remove
and replace if necessary).
1. If the window has a preinstalled cable support
Bracing Under the Mull Joints
system, follow the
instructions provided by
the manufacturer.
2. If the cable support system
is not used, build seat
board bracing to support
at least 750 lbs. of total
weight (window plus
window contents). Primary
support should be provided
under the mull joints of the
unit.
Seal corners
3. Remove temporary support
after full support is
installed.
4. Release the building wrap
from above the header
(previously taped up)
and overlap the header
ashing. Seal the ends with
self-adhesive ashing or building wrap tape.
5. Seal all four corners of the window with a 1/4" bead of sealant. Tool
into a llet shape.
6. The head and seat boards should be protected and insulated with a
structure designed and built as required by local code.
Please visit www.jeld-wen.com for warranty and care and maintenance information.
Thank you for choosing
7. Create a continuous air seal
on the interior between
the rough opening and the
window frame with low
expansion polyurethane
foam or backer rod and
sealant. On the sill, the
Continuous
air seal
foam or sealant must
create this air seal by
integrating the back of the
drain mat with the window
frame and the rough
Back of
ashing
Framing
Shim
opening.
AFTER INSTALLATION
1. Adjust window for best operation.
2. Install exterior wall surface within 30 days of window installation.
3. Maintain gap of 3/8" between window frame and nal exterior wall
surface (siding, stucco, etc.).
4. Remove protective lm from cladding (if present) immediately after
installation; remove from glass within one year.
5. Protect recently installed units from damage from plaster, paint, etc.
by covering the unit with plastic.
6. Finish all exposed wood surfaces immediately following installation.
©2014 JELD-WEN, inc.; This publication and its contents are owned by JELD-WEN, inc. and are protected under the U.S. Copyright Act and other intellectual property laws. All trademarks, service marks,
logos and the like (whether registered or unregistered) are owned or controlled by JELD-WEN, inc. or others. Unauthorized use or duplication of JELD-WEN intellectual property is prohibited.
JELD-WEN reserves the right to change product specications without notice. Please check our website, jeld-wen.com, for current information.
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(05/14)
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