Wolverine Siding and Vinyl Carpentry Soffit and Decorative Trim - Manual (Page 41)

Measure the side casing and add 7". Use a triangle to create a
45˚ angle or measure 3-1/2" in from the edge of the part. Use
snips or a miter saw to remove this portion.
Flip the part over and remove the locking leg as shown. This
should be done to both ends.
Snap the lineal over the J-channel as shown. Use the same
measurements for both sides.
Corner blocks
Install J-channel around the perimeter of the window opening.
J-channel should be the same length as the casing.
Install corner blocks on all 4 corners as shown. Leave blocks
loose until the lineals are installed.
Cut the lineals the same length as the window casing.
Start with one end and angle a lineal into the corner block and
snap it over the J-channel.
Continue installing lineals around the window.
Crown molding
Crown molding will fit over the top of the lineal system.
Install J-channel and lineals around window casing.
Measure the top lineal and add 2-1/2". This will be the crown
molding length.
Insert crown molding cap into the crown molding and trace
the shape. Trim off the marked line.
The crown molding requires a tab 2" long – cut from the
pocket receiver as shown.
Cut the crown molding cap in half and apply the halves with a
bead of caulk.
Insert the crown molding into the top of the lineal as shown.
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Wolverine Fit and Finish Installation Guide