Setting and fastening the window (continued) – Pella 812W0100 User Manual

Page 6

C. Fold down top flap of water resistive barrier (3C).

D. Apply flashing tape to diagonal cuts. Cut pieces of

flashing tape at least 1" longer than the diagonal cuts in

the water resistive barrier. Apply the tape covering the

entire diagonal cut in the water resistive barrier at both

upper corners of the window.

Note: Be sure to overlap the top corners (3D).

SETTING AND FASTENING THE WINDOW (continued)

M. Drill 1/8” x 1” deep pilot holes

into the rough framing through the

clearance holes in the unit frame.

N. Install #10 x 3-1/2” corrosion

resistant wood screws

into each of

the clearance holes.
Note: Drive the screws snug but DO

NOT over-tighten the screws. DO

NOT bend or bow the unit frame.

#10 x 3-1/2"

corrosion resistant

wood screw

Drill 1/8" diameter pilot

hole through the clearance

hole in the frame

Note: The flashing tape must be applied

approximately 1/2" onto the frame cladding at the

jambs and head. Pre-folding the tape at 1/2" before

removing the paper backing will make it easier to

apply the tape correctly. If the siding is less than 1/2"

thick, adjust the dimension of the fold so the exterior

sealant line will cover the exterior edge of the tape.

INTEGRATING THE WINDOW TO THE

WATER RESISTIVE BARRIER

Flashing

Tape

Rectangular Units Only:

A. Apply side flashing tape. Cut two pieces of flashing

tape 4" longer than the frame height of the window.

Apply one piece to each side 1/2" onto the frame

cladding, over the nailing fin and onto the water

resistive barrier. The tape should extend 2" above the

top of the window and 2" below the bottom of the

window. Press the tape down firmly while folding

down the excess tape at the top and bottom of the

window.

B. Apply top flashing tape. Cut a piece of flashing

tape long enough to go across the top of the window

and extend at least 1" past the side flashing tape

on both sides. Apply the tape 1/2" onto the frame

cladding, over the top nailing fin as shown. Fold

the overlapping tape down, and press all tape down

firmly.

Note: DO NOT tape or seal the bottom nailing fin.