Rough opening preparation (continued) – Pella 818T0101 User Manual

Page 3

D. Cut the weather resistive barrier, if applicable (1D).

4th cut:
Make a 6" cut up from
each top corner at a 45°
angle to allow the weather
barrier to be lapped over
the ﬁn at the head of
the door.

1st cut

2nd cut

3rd cut

Water Resistive Barrier

E. Fold the weather resistive barrier (1E). Fold side

ﬂaps into the opening and staple to inside wall. Fold
top ﬂap up and temporarily fasten with ﬂashing tape.

ROUGH OPENING PREPARATION
(CONTINUED)

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 (1F)
so it overhangs 1" to the exterior.

Note: The tape is cut 12" longer than the width
so it will extend 6" up each side
of the opening.

G. Tab the sill ﬂashing tape and fold. Cut 1" wide

tabs at each corner (1/2" from each side of corner)
(1G). Fold tape to the exterior and press ﬁrmly to
adhere it to the weather resistive barrier.

H. Apply sill ﬂashing tape #2. Cut a piece of

ﬂashing tape 12" longer than the opening width.
Apply at the bottom further towards the interior,
overlapping tape #1 by at least 1". Do not allow the
tape to extend past the interior face of the framing
(1H). If the wall depth is greater than 5", add a
third piece of ﬂashing tape. The ﬂashing tape
should come to within 1" of the interior face of the
framing.

Note: The ﬂashing tape does not need to extend
all the way to the interior of the framing.

I. When required for adequate sill support,

attach the optional aluminum sill support or wood
blocking to the exterior of the box plate to support
the exterior edge of the door sill (1I). Place the sill
support ﬂush with the sill rough opening.

1/2"