© 2009 Pella Corporation
Part Number: 802Q0101
INSTALLATION INSTRUCTIONS
SLIDING, SINGLE-HUNG and FIXED WINDOW
WITH FINS
Installation Instructions for Typical Wood Frame Construction.
These instructions were developed and tested for use with typical wood frame wall construction in
a wall system designed to manage water. These instructions are not to be used with any other
construction method. Installation instructions for use with other construction methods or multiple
units may be obtained from Pella Corporation or a local Pella retailer. Building designs, construction
methods, building materials, and site conditions unique to your project may require an installation
method different from these instructions and additional care. Determining the appropriate installation
method is the responsibility of you, your architect, or construction professional.
YOU WILL NEED TO SUPPLY:
• Cedar or Impervious shims/spacers (12 to 20)
TOOLS REQUIRED:
• Tape measure
• 2" galvanized roofing nails (1/4 lb.)
• Level
• Closed cell foam backer rod/sealant backer (12 to 30 ft.)
• Square
• Pella® SmartFlash™ foil backed butyl window
• Hammer
and door flashing tape or equivalent
• Stapler
• OSI Quad or Geocel Pro-Flex Tri-polymer Sealant
• Sealant gun
• Scissors or utility knife
• Small flat blade screwdriver
• Rubber mallet
(1 tube per window)
SEALANT
• Great Stuff ™ Window and Door Insulating Foam Sealant
by the Dow Chemical Company or equivalent low pressure
polyurethane window and door foam - DO NOT use high
pressure or latex foams
Installation will require two or more persons for safety reasons.
REMEMBER TO USE APPROPRIATE
PERSONAL PROTECTIVE EQUIPMENT.
Nailing Fin
Top
Flashing
Tape
Corner
Flashing
Tape
Side
Flashing
Corner
Flashing
Tape
Tape
Weep Valves
Sill Flashing Tape #1
Side
Flashing
Tape
Sill Flashing Tape #2
Weather Resistive Barrier
Sheathing
Framing
Always read the Pella Impervia Limited Warranty before purchasing or installing
Pella Impervia products. By installing this product, you are acknowledging that this Limited
Warranty is part of the terms of the sale. Failure to comply with all Pella Impervia installation and
maintenance instructions may void your Pella Impervia product warranty. See Limited Warranty for
complete details on http://warranty.pellaimpervia.com.
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2SETTING AND FASTENING THE WINDOW
A. Install and level sill spacers. Place 1" wide by 1/4" thick spacers
on the bottom of the window opening 1/4" from each side.
Spacers are also required at transition bars in multiple sash units.
Add shims as necessary to ensure the spacers are level. Once level,
attach spacers and shims to prevent movement.
2A
Note: Improper placement of shims or spacers may result in
bowing the bottom of the window.
B. Remove plastic wrap and cardboard packaging from window.
DO NOT open the window until it is fully fastened.
Note: For best results, install the window with the sash
closed and locked with the shipping spacers in place.
TWO OR MORE PEOPLE WILL BE
REQUIRED FOR THE FOLLOWING
STEPS.
2C
Note: If fins are to be installed to no fin
units, go to the Applying Installation Fin
instructions on the back before proceeding
to step C.
C. Insert the window from the exterior of the
building. Place the bottom of the window on the spacers
at the bottom of the opening, then tilt the top into
position. Center the window between the sides of the
opening to allow clearance for shimming and insert one
roofing nail in the first hole from the corner on each end
of the top nailing fin. These are used to hold the window
in place while shimming it plumb and square.
Interior View
2D
D. Plumb and square window. Place shims 1" from the
bottom and top of the window between the window and
the sides of the opening. Adjust the shims as required
to plumb and square the window in the opening. If the
frame height exceeds 53", place shims at the quarter
points of the window sides.
2D
Note: DO NOT shim above the window or in the
space between the spacers at the bottom of the window.
DO NOT over shim.
2E
E. Check the interior reveal. Make sure the
1
INCHE
m
S
m
2
0
2
measurement from the interior face of the
window to the interior face of the wall is
equal at several points around the window.
3
0
4
0
3
5
0
6
0
7
0
F. Fasten the window to opening by driving 2”
galvanized roofing nails into each prepunched
hole in the nailing fin.
2E
G. Check the window operation. Remove the plastic
spacers located between the bottom of the vent panel and
the frame sill. Open and close the window a few times to
check for proper operation. Close and lock the window.
Note: If there are any problems with the operations
of the window, recheck shim locations and adjust for
plumb and square.
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3INTEGRATING THE WINDOW TO THE WATER RESISTIVE BARRIER
A. Apply side flashing tape. Cut two pieces of flashing
tape 4" longer than the frame height of the window.
Apply one piece to each side 1/2" onto the frame,
over the nailing fin and onto the water resistive
barrier. The tape should extend 2" above the top
3A
of the window and 2" below the bottom of the
window. Press the tape down firmly while folding
down the excess tape at the top and bottom of the
window.
B. Apply top flashing tape. Cut a piece of flashing tape
long enough to go across the top of the window and
extend at least 1" past the side flashing tape on both
3B
sides. Apply the tape 1/2" onto the frame, over the
top nailing fin as shown. Fold the overlapping tape
down, and press all tape down firmly.
3B
Note: DO NOT tape or seal the bottom nailing fin.
1"
C. Fold down top flap of the water resistive barrier.
3C
D. Apply flashing tape to diagonal cuts. Cut pieces of
flashing tape at least 1" longer than the diagonal cuts
3D
in the water resistive barrier. Apply the tape covering
the entire diagonal cut in the water resistive barrier
at both upper corners of the window.
3D
Note: Be sure to overlap the top corners.
4INTERIOR SEAL
Caution: Ensure use of low pressure polyurethane window and door insulating foams and
strictly follow the foam manufacturer’s recommendations for application. Use of high pressure
foams or improper application of the foam may cause the window frame to bow and hinder
operation.
Interior View
A. Apply insulating foam sealant. From the interior, insert
the nozzle of the applicator approximately 1" deep into the
space between the window and the rough opening and apply
a 1" deep bead of foam. This will allow room for expansion
of the foam and will minimize squeeze out. If using foam
4A
other than Great Stuff ™ Window and Door Insulation Foam
Sealant by the Dow Chemical Company, allow the foam to
dry completely (usually 8 to 24 hours) before proceeding to
the next step.
Note: DO NOT completely fill the space from the back of
the fin to the interior face of the opening.
B. Check window operation (vent units only) by opening and closing the window.
Note: If the window does not operate correctly, check to make sure it is still plumb, level,
square and that the sides are not bowed. If adjustments are required, remove the foam
with a serrated knife. Adjust the shims, and reapply the insulating foam sealant.
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5SEALING THE WINDOW TO THE EXTERIOR WALL CLADDING
When applying siding, brick veneer or other exterior finish material, leave adequate space
between the window frame and the material for sealant. Refer to the illustration that
corresponds to your finish material.
Note: The sealant details shown are standard recommendations from the sealant industry.
Contact your sealant supplier for recommendations and instructions for these and any other
applications.
VINYL/STEEL
SIDING
WOOD
SIDING
BRICK VENEER
Backer rod
and
sealant
typical
Backer rod
and
sealant
typical
Sealant
typical
Insulate
and seal
Insulate
and seal
Insulate
and seal
1/8"
1/4"
1/4"
1/4"
min.
1/4"
min.
SOUTHWESTERN WALL
WITH STUCCO
STUCCO WITH
INSULATION BOARD
1/4"
1/4"
1/4"
min.
1/4"
min.
A. Insert closed cell foam backer rod into the space around the window as deep as it will go.
This should provide at least a 1/4” clearance between the backer rod and the exterior face of
the window.
Note: Backer rod adds shape and depth for the
sealant line.
B. Apply a bead of high quality exterior grade sealant
5B
5A
to the entire perimeter of the window.
C. Shape, tool and clean excess sealant. When finished,
the sealant should be the shape of an hourglass.
Note: This method creates a more flexible sealant
line capable of expanding and contracting.
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APPLYING INSTALLATION FINS
Frame head groove
A. Slide the precut bottom fin into
the frame sill groove located on the
bottom window frame member.
B
B. Install the 2 precut side fins into
the top of the frame jamb grooves
located on the side frame members
of the window. Slide the fins into
place.
C
Note: The side fins must overlap
the exterior of the bottom fin.
B
Frame
sill groove
C. Install and slide the precut top fin
into the frame head groove located
in the top frame member.
Note: The top fin must overlap
the exterior of the side fins.
A
Frame jamb groove
D. Seal the over-lapping fin joints with sealant.
TO INSTALL THE WINDOW(S) PROCEED TO STEP 2C.
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FINISH
The interior and exterior frame and sash are protected by a powder coat baked-on factory finish that
requires no painting. Clean this surface with mild soap and water. Stubborn stains and deposits may be
removed with mineral spirts. DO NOT use abrasives. DO NOT scrape or use tools that might damage
the surface.
Use of inappropriate solvents, brickwash or cleaning chemicals will cause adverse reactions with
window and door materials and voids the Limited Warranty.
CARE AND MAINTENANCE
Care and maintenance information is available by contacting your local Pella retailer. This information
is also available at www.pellaimpervia.com.
IMPORTANT NOTICE
Because all construction must anticipate some water infiltration, it is important that the wall system be
designed and constructed to properly manage moisture. Pella Corporation is not responsible for claims
or damages caused by anticipated and unanticipated water infiltration; deficiencies in building design,
construction and maintenance; failure to install Pella® products in accordance with Pella installation
instructions; or the use of Pella products in wall systems which do not allow for proper management
of moisture within the wall systems. The determination of the suitability of all building components,
including the use of Pella products, as well as the design and installation of flashing and sealing systems
are the responsibility of the Buyer or User, the architect, contractor, installer, or other construction
professional and are not the responsibility of Pella.
Pella products should not be used in barrier wall systems which do not allow for proper management
of moisture within the wall systems, such as barrier Exterior Insulation and Finish Systems, (EIFS)
(also known as synthetic stucco) or other non-water managed systems. Except in the states of
California, New Mexico, Arizona, Nevada, Utah, and Colorado, Pella makes no warranty of
any kind and assumes no responsibility for Pella windows and doors installed in barrier wall
systems. In the states listed above, the installation of Pella products in barrier wall or similar
systems must be in accordance with Pella installation instructions.
Product modifications that are not approved by Pella Corporation will void the Limited Warranty.
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