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Part Number: 802Q0101

© 2009 Pella Corporation

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.

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.

Top

Flashing

Tape

Nailing Fin

Sill Flashing Tape #2

Sill Flashing Tape #1

Side

Flashing

Tape

Weep Valves

Weather Resistive Barrier

Sheathing

Framing

Side

Flashing

Tape

Corner

Flashing

Tape

Corner

Flashing

Tape

YOU WILL NEED TO SUPPLY:

•  Cedar or Impervious shims/spacers (12 to 20)
•  2" galvanized roofing nails (1/4 lb.)
•  Closed cell foam backer rod/sealant backer (12 to 30 ft.)
•  Pella

®

 SmartFlash

 foil backed butyl window 

  and door flashing tape or equivalent
•  OSI Quad or Geocel Pro-Flex Tri-polymer Sealant 
  (1 tube per window)
•  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

TOOLS REQUIRED:

•  Tape measure
•  Level
•  Square
•  Hammer
•  Stapler
•  Sealant gun
•  Scissors or utility knife
•  Small flat blade screwdriver
•  Rubber mallet

Installation will require two or more persons for safety reasons.

SEALANT

SEALANT

REMEMBER TO USE APPROPRIATE 

PERSONAL PROTECTIVE EQUIPMENT.

Summary of Contents for 802Q0101

Page 1: ...d 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 c...

Page 2: ...g 12 longer than the opening width Apply at the bottom of the opening as shown so it overhangs 1 to the exterior Note The tape is cut 12 longer than the width of the opening so that it will extend up...

Page 3: ...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 D Plumb and squ...

Page 4: ...corners of the window Note Be sure to overlap the top corners 4 INTERIOR SEAL Caution Ensure use of low pressure polyurethane window and door insulating foams and strictly follow the foam manufacturer...

Page 5: ...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 exte...

Page 6: ...to the top of the frame jamb grooves located on the side frame members of the window Slide the fins into place Note The side fins must overlap the exterior of the bottom fin C Install and slide the pr...

Page 7: ...ts 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...

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