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Interior
1A
Interior
1B
C. Cut the water resistive barrier. Fold side flaps into the
opening and staple to inside wall.
YOU WILL NEED TO SUPPLY: TOOLS REQUIRED:
• Cedar or Impervious shims/spacers (12 to 20)
• 10d galvanized nish nails or #8 x 2 1/2" at head corrosion-
resistant screws (4 to 6)
• Closed cell foam backer rod/sealant backer (20 to 35 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 (25 to 40 ft.)
• Knee braces (2)
• Tape measure
• Level
• Square
• Hammer
• Stapler
• Scissors or utility knife
• Sealant gun
• Drill with a #2 Phillips
and a #3 square drive bit
• 3/16" wrench or socket
• 1/2" open end wrench
SEALANT
SEALANT
REMEMBER TO USE APPROPRIATE PERSONAL PROTECTIVE EQUIPMENT.
A. Verify the opening is plumb and level.
Note: It is critical that the bottom is level.
1st cut
2nd
cut
3rd cut
Water Resistive Barrier
1C
B. Verify 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. 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.
1E
1"
1/2"
1/2"
6"
1D
1
ROUGH OPENING PREPARATION
D. Apply sill flashing tape #1. Cut a piece of ashing tape 12" longer
than the opening width. Apply at the bottom of the opening as
shown (1D) so it overhangs 1" to the exterior.
Note: e tape is cut 12" longer than the width so that it will
extend 6" up each side of the opening.
E. Tab the sill flashing tape and fold. Cut 1" wide tabs at each
corner (1/2" from each side of corner) (1E). Fold tape to the
exterior and press rmly to adhere it to the water resistive barrier.