Opening preparation – Pella Clad Windows with Flush Flange 81CP0101 User Manual

Page 2

YOU WILL NEED TO SUPPLY:

• Composite or Impervious shims/spacers

(12 to 20)

• Pressure-treated 2x4 (4-6 ft)
• 3-1/4” finish head screws (16-20)
• Wood blocking to support new window.

(20-30 ft)

• Pella® SmartFlash™ foil backed butyl window

and door flashing tape or equivalent

• Pella Window and Door Installation Sealant or

equivalent high quality, multi-purpose sealant
(2 tubes per window)

• Low expansion, low pressure polyurethane

insulating window and door foam sealant -
DO NOT use high pressure or latex foams

TOOLS REQUIRED:

• Tape measure
• Level

• Sealant gun
• Square

• Screwdriver (Flat)
• Utility knife
• Hacksaw
• 5/32" and 3/8" drill bit
• 1/2" drill guide
• Drill
• Reciprocating saw
• Electric shears, circular

saw or table saw
(optional)

Installation will require two or more persons.

A. Prior to removing the existing window sash

and/or glass, check that the frame size of the new

window is 1/2” to 3/4” smaller that the inside of the

existing frame or 1/2” to 3/4” smaller than the inside

of the drywall return for the flush-cut method to

make sure it will fit correctly.

B. Prepare the window opening by removing the

sash and/or glass from the existing aluminum

window frame.
Note: If a divider exists between vent and fixed

glass areas it will be necessary to cut with a

reciprocating saw or hacksaw and remove.

OPTIONAL FLUSH CUT METHOD
(Skip to step F for non flush cut installation)

C. Using a reciprocating saw cut two passes 2” apart

through the exiting window stop flanges. Do not

cut into the drywall.

SEALANT

OPENING PREPARATION