Step 12
Step 11:
Apply a suitable 
lathe over the sheath-
ing.
Step 9:
Install Final course 
of building paper 
over the top flashing,
overlapping the jamb
flashing.
Seal paper to
nailing fin 
with seal
Step 9
Step 10
Step 11
Step 10:
Install foam 
sheathing 
(or other 
appropriate 
substitute) over 
the building paper.
Step 12:
Trowel on stucco, mak-
ing sure it makes prop-
er bonding contact with
the lathe.
Provide an expansion
joint between the stuc-
co and the window (a
gap for backer rod and
sealant).
Air seal around entire
perimeter with sealant.
Window Fitters Guide to Window Installation 
106               ©2022 AWDI, LLC Do not reproduce without permission
Finned Window w/Stucco Finish in Wood Wall
SAMPLE MANUAL

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