Rough opening preparation – Pella 81470102 User Manual

Page 2

A. Remove all packaging from the window.

B. REPLACEMENT APPLICATIONS: Remove the

existing, window, trim, insulation and sealant from the
opening.

ROUGH OPENING PREPARATION

C. NEW CONSTRUCTION APPLICATIONS: Cut the

water resistive barrier. Fold the side flaps into the opening
and staple to inside wall.

YOU WILL NEED TO SUPPLY:

TOOLS REQUIRED:

• Impervious Shims/Spacers (12 to 20)
• Finish nails, 1" brads
• 3/16" x 2-1/2" concrete screws (for masonry installation)
• Closed cell foam backer rod/sealant backer (12 to 30 ft.)
• Pella

SmartFlash

™

foil backed butyl window and

door flashing tape or equivalent

• 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.

• OSI Quad Multi-Polymer sealant or equivalent high

quality exterior grade polyurethane or silicone sealant.
(1 tube per window)

• Tape measure
• Level
• Square
• Hammer or Finish Nailer
• Stapler
• Scissors or utility knife
• Drill with a #2 Phillips (at least

4" long) and #3 square drive bit
(provided in cable clamp kit)

• 1/2" open end wrench
• 3/16" wrench or socket
• Sealant Gun

Installation will require two or more persons for safety reasons.

4&"-"/5

REMEMBER TO USE APPROPRIATE PERSONAL PROTECTIVE EQUIPMENT.

Interior

1st cut

2nd

cut

3rd cut

Water Resistive Barrier

D. Confirm the window will fit the opening. Measure all

four sides of the opening to make sure it is 3/4" larger
than the window in both width and height. Measure the
width and height in several places to ensure the header
and 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 opening before proceeding. If installing new
blocking, install the blocking so it’s flush with the
exterior sheathing of the house. DO NOT attempt to
install a window in an under size opening.

E. Confirm the opening is plumb and level.

Note: It is critical the bottom is level.

LEGEND - STEPS REQUIRED OF:

NEW

CONST

REPL

APPS

ALL

= All applications

REPL

APPS

= Replacement applications

NEW

CONST

= New Construction applications