Pella 80AT0102 Rough Opening Preparation, Cut the water resistive barrier. Fold side flaps into

YOU WILL NEED TO SUPPLY:

•Cedar or Impervious shims/spacers (12 to 20)

•10d galvanized finish nails or #8 x 2 1/2" flat 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) SEALANT

•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)

TOOLS REQUIRED:

•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

1

REMEMBER TO USE APPROPRIATE PERSONAL PROTECTIVE EQUIPMENT.

ROUGH OPENING PREPARATION Interio r

A. Verify the opening is plumb and level.

Note: It is critical that the bottom is level.

1A

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.

	Interio	r
C. Cut the water resistive barrier. Fold side flaps into the
opening and staple to inside wall.
Water Resistive Barrier	1B
	1C
1st cut

3rd cut

2nd

cut

D. 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 (1D) 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.

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 firmly to adhere it to the water resistive barrier.

1"

1D

6"

1/2"

1/2"

1E