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E. 

Apply sill flashing tape #1

. Cut a piece of flashing tape 12" 

longer than the opening width. Apply at the bottom of the 

opening as shown (1E) so it overhangs 1" to the exterior.

Note: The tape is cut 12" longer than the width so that it 

will extend 6" up each side of the opening.

F. 

Tab the sill flashing tape and fold

. Cut 1" wide tabs at each 

corner (1/2" from each side of corner) (1F). Fold tape to the 

exterior and press firmly to adhere it to the water resistive 

barrier.

G. 

Apply sill flashing tape #2

. Cut a piece of flashing tape 

12" longer than the opening width. Apply at the bottom, 

overlapping tape #1 by at least 1". Do not allow the tape to 

extend past the interior face of the framing (1G).

Note: The flashing tape may not fully cover the framing 

members.

1F

1" 

1/2" 

1/2" 

6" 

1E

1" 

1G

A. 

Install and level sill spacers

. Place 1" wide by 3/8" thick spacers 

on the bottom of the window opening 1/2" from each side. 

Spacers are also required at points where windows are joined in 

multiple window applications. Add shims as necessary to ensure 

the spacers are level. Once level, attach spacers and shims to 

prevent movement.

Note: Improper placement of shims or spacers may result in 

bowing the bottom of the window.

2A

2C

B. 

Remove plastic wrap and cardboard packaging

 from window. DO NOT remove plastic 

shipping spacers located between the window sash and frame. The shipping spacers will help 

keep the window square during installation. DO NOT unlock or open the window until it 

is fully fastened.

Note: If screens, grilles or hardware are removed from the window at this time, label 

them and store them in a protected area.

C. 

Fold out installation fin to 90°

. Be careful not to remove or 

tear the fin corners.

Note: If the fin is not at 90

°

, the window will not line up 

correctly on the interior.

Fixed  

Extruded Fin 

D. 

Curved Units with Fins:

 

Curved Units with frame radius > 12" will be provided with fixed fin.

  On windows with fixed extruded fin, drill 1/8" diameter holes in the fin every 12".

1

ROUGH OPENING PREPARATION (continued)

2

SETTING AND FASTENING THE WINDOW

Summary of Contents for 812W0100

Page 1: ... 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 Framing Corner Flashing Tape Top Flashing Tape Corner Flashing Tape Fin Corner Window Top Nailing Fin Window Bottom Side Flashi...

Page 2: ...ing to make sure it is 3 4 larger than the window in both width and height On larger openings measure the width and height in several places to ensure the header or studs are not bowed Note 1 1 2 or more of solid wood blocking is required around the perimeter of the opening Fix any problems with the rough opening before proceeding Interior 1A Interior 1B C Cut the water resistive barrier 1C 1D Ext...

Page 3: ...quired at points where windows are joined in multiple window applications Add shims as necessary to ensure the spacers are level Once level attach spacers and shims to prevent movement Note Improper placement of shims or spacers may result in bowing the bottom of the window 2A 2C B Remove plastic wrap and cardboard packaging from window DO NOT remove plastic shipping spacers located between the wi...

Page 4: ...clip placement Clips provided should be evenly spaced across the curved frame member and no more than 16 on center Place the clips so the lip is facing up and against the instillation fin Secure each clip by driving a 6 x 5 8 corrosion resistant screws through the outer two holes of the three holes shown 2E E Insert the window from the exterior of the building Place the bottom of the window on the...

Page 5: ...hed hole in the nailing fin Note Make sure the fin corner is lying as flat as possible 2 SETTING AND FASTENING THE WINDOW continued J For units with flexible non structural curved fin on which clips were added Fasten the clips to the opening by driving two 6 x 1 1 2 or longer corrosion resistant into the pre punched holes in the clips If clips are bent and fastened to the interior stud install the...

Page 6: ...re folding the tape at 1 2 before removing the paper backing will make it easier to apply the tape correctly If the siding is less than 1 2 thick adjust the dimension of the fold so the exterior sealant line will cover the exterior edge of the tape 3 INTEGRATING THE WINDOW TO THE WATER RESISTIVE BARRIER Flashing Tape Rectangular Units Only A Apply side flashing tape Cut two pieces of flashing tape...

Page 7: ... of flashing tape will be needed to cover the top fin Start taping from the sides of the window working toward the peak To determine the length of cuts hold the tape along the radius and cut the tape just past where it leaves the top fixed extruded fin or for the flexible fin just past the flexible weather strip The top tape must overlap the one beneath it in order to divert water properly The sha...

Page 8: ...ustments are required remove the foam with a serrated knife Adjust the shims and reapply the insulating foam sealant Interior 4A 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 f...

Page 9: ...ty exterior grade sealant 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 5A 5B 5 SEALING THE WINDOW TO THE EXTERIOR WALL CLADDING continued Additional cutting patterns Circle Head Full Circle Trapezoid Octagon Arch Hea...

Page 10: ... NOT scrape or use tools that might damage the surface Use of inappropriate finishes 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 in the Pella Owner s Manual You can obtain an owner s manual by contacting your local Pella retailer This informatio...

Page 11: ...final installation fold the crank over and snap the knob into the pocket Note Even with the window open the crank can be folded to avoid interfering with the window treatments Crank Handle C D Operator Stud Set Screw A B Pocket End Operator Stud Knob E Pocket LOCK LEVER REMOVAL AND INSERTION Note You may want to remove the lock lever prior to finishing the window or if it needs to be replaced with...

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