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CertainTeed Vinyl Siding Installation Guide
59
Crown Molding and Cap for
3/4" Pocket J-Channel
You will need:
• Crown molding
• Crown molding end caps
• 3/4" pocket J-channel header and surround
To use crown molding with 3/4" pocket J-channels, measure the
length of the completed J-channel surround and add 2-1/2" (the
crown molding overlaps the J-channels by 1-1/4" per side).
Insert the crown molding cap into the crown molding and trace the
tip shape. Trim as shown.
Insert 1/2 of the crown molding cap into each end of the crown
molding lineal. Secure the crown molding with a bead of caulk.
Miter or square cut the J-channel (mitered corner is shown).
Insert the 3/4" wide rain tab into the receiving channel of the
side J-channel.
Crown Molding with 3-1/2" Lineal Surround
In addition to J-channel, crown moldings can also be used
with lineals. The next two pages demonstrate how crown
molding can be used with various lineal configurations.
Above all, remember that before applying accessories and
siding, make certain the substrate is watertight. In order to be
properly protected from precipitation, the substrate may need
to be properly flashed to shed water to the exterior. The siding
alone is not a watertight barrier.
cut crown molding
cap in half
2" rain tab
window
or door
frame
window
flashing
insert cap (see above
for instructions on
assembling the cap)
2"
rain
tab