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A. Verify the opening is plumb and level.
Note: It is critical that the bottom is level.
1
ROUGH OPENING PREPARATION
REMEMBER TO USE APPROPRIATE PERSONAL PROTECTIVE EQUIPMENT.
B. Verify the window will fit the opening. Measure all four sides
of the opening to make sure it is 1/2" larger than the window in
both width and height. On larger openings measure the width and
height in the center to check for bowed header and studs.
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.
C. Cut the water resistive barrier (1C).
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YOU WILL NEED TO SUPPLY:
• Cedar or Impervious shims/spacers (12 to 20)
• 2" galvanized roofing nails (1/4 lb.)
• #10 x 3-1/2" corrosion resistant wood screws (12 to 20)
• Closed cell foam backer rod/sealant backer (12 to 30 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
• Interior trim and/or jamb extensions (15 to 40 ft.)
Installation Clip Option:
• 6" or 8" Installation clips
• #6 x 5/8" corrosion resistant flat head wood screws
• #8 x 1-1/4" corrosion resistant flat head wood screws or
3/16" x 1-1/2" masonry screw for concrete
block applications
4&"-"/5
4&"-"/5
TOOLS REQUIRED:
• Tape measure
• Level
• Square
• Hammer
• Stapler
• Sealant gun
• Scissors or utility knife
• Small flat-blade screwdriver
• Drill
• Drill bits 13/64" and 1/8"
• Power screwdriver
with #2 Phillips bit