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3F 

F. 

Place shims approximately 5"

 up from the bottom of 

window to plumb and square the window. Check for 

squareness by making sure the diagonal measurement 

from corner to corner is within 1/16" in both directions. Also 

place shims in line with the jamb hole near the center of the 

unit. Trim shims back so they recessed back 1/4” - 1/2” from 

the interior face of the window frame.

 

For windows over 53" tall:

 Place two additional shims along 

each side of the window, evenly spacing them between the 

top and bottom shims and the midpoint shim.

G. 

Check the new sill to confirm it is flat and level

 using a level 

or straight edge along the exterior edge of the new sill. If 

the sill is bowed (humped) screen fit issues may result.  

3I

EXTERIOR

3G

Note: To Resolve Sill Bow (hump):

•  Push Down on the center of the sill to seat the adjustable 

sill adapter.

•  Check the shims at the sill for proper location. (See Step 

2B).

•  If the sill adapter is touching the existing (old) sill, remove 

the sill adapter to relieve pressure on the new sill. 

H. 

Cut the checkrail band at each jamb and remove.

 Check 

jambs for straightness by measuring the top, middle and 

bottom of the frame. Widths should be within 1/16".

 

Designer Series only:

 After cutting the checkrail band, push 

the remaining tails of the band into the jambliner hole.

I. 

Adjust the screw jacks if required.

 With a flat blade 

screwdriver turn clockwise to move the frame toward the 

sash.

 A

rchitect Series Units:

 The jamb jack holes are located in the 

interior balance channel near the checkrail; the lower sash 

must be tilted in to adjust the jamb jack.

Note: If the frame and sash are too tight and are  

not adjustable using the jamb jacks, the window is  

over-shimmed.

J. 

Finish driving the top installation screws through the wood 

frame jamb,

 ensuring the head of the screw is flush with the 

surface of the wood frame to avoid interference with the 

balance assembly.

K. 

Raise the bottom sash to install the lower two installation 

screws.

 Drive the installation screws below the surface of the 

wood frame.

 

Architect Series Units: 

The lower installation holes are located in the interior balance 

channel near the sill.  These holes are not pre-drilled through the wood frame.  Drive 

the installation screws through the wood frame jamb, ensuring the head of the screw is 

below the surface of the wood frame to avoid interference with the balance assembly.

L. 

Check window operation.

 Open and close the window a few times to check for proper 

operation. Make sure the window will tilt correctly. 

 

Designer Series Only: 

After adjustments are completed, install plastic plugs in the jamb 

liner holes.

Note: If there are any problems with the operation of the window, recheck the shim 

locations and adjust for plumb and square.

3

SEALING AND FASTENING THE WINDOW (CONTINUED)

Summary of Contents for 808F0105

Page 1: ...0 ft Pella SmartFlash foil backed butyl window and door flashing tape or equivalent High quality exterior grade polyurethane or silicone 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 Tape measure Level Hammer Utility knife Pry bar Sealant ...

Page 2: ...opening and window dimensions prior to removing the existing window sash A Score paint or varnish along interior sash stops with a sharp utility knife Remove the interior sash stops at jambs sides and head top using a putty knife and pry bar B Cut the balance cords on the bottom sash and lift out the sash Allow weights to fall to the bottom of the weight pocket 1 DOUBLE HUNG SASH REMOVAL C Remove ...

Page 3: ...ote Improper placement of shims may result in bowed humped sill C Remove plastic wrap cardboard packaging and sill packaging board from window DO NOT cut the checkrail bands or remove plastic shipping spacers located between the window sash and frame The shipping spacers will help keep the window square during installation Note If screens grilles or hardware are removed from the window at this tim...

Page 4: ...of the window in first and tilt the top into place Make sure the window is centered in the opening and is pressed firmly against the exterior blind stops E Place a shim at each of the top corners in line with the pre punched holes and partially insert 2 1 2 screws provided This will hold the window in place while shimming it plumb and square Trim shims back so they recessed back 1 4 1 2 from the i...

Page 5: ... hole I Adjust the screw jacks if required With a flat blade screwdriver turn clockwise to move the frame toward the sash Architect Series Units The jamb jack holes are located in the interior balance channel near the checkrail the lower sash must be tilted in to adjust the jamb jack Note If the frame and sash are too tight and are not adjustable using the jamb jacks the window is over shimmed J F...

Page 6: ...ing and apply a 1 deep bead of foam This will allow room for expansion of the foam and will minimize squeeze out Apply sealant across the interior surface of the shims to create a continuous seal Follow foam manufacturer s instructions Note It may be necessary to squeeze the end of the tube with pliers to be able to insert into the space between the new and existing window frame DO NOT completely ...

Page 7: ...ed Warranty On casement and awnings it is optional to paint stain or finish the vertical and horizontal sash edges On single hung and double hung do not paint stain or finish the vertical sash edges any finish on the vertical sash edges may cause the sash to stick it is optional to paint stain or finish the horizontal sash edges On patio doors it is optional to paint stain or finish the vertical a...

Page 8: ...lity 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 moist...

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