Installation Instructions

Install inverted J-channel along the top of the wall, under
the eave. Here again, leave a 1/4" gap between J-
channel and cornerposts. Overlap J-channels 3/4" to
allow for expansion. When positioning the upper J-
channel, be sure to allow for expansion of the siding
panel. In most cases, position the J-channel at a point
equal to the length of the panel plus 5/8" (1/4" for upper
expansion and 3/8" for lower expansion).
Soffit
If you’re going to install soffit, you may want to install the
receiving channels for the soffit at this point.
The illustrations show alternative approaches for
installing siding and soffit receiving channels.
If a wall requires more than one course of siding, you
can proceed in one of three ways:
Use two lengths of J-channel, back-to-back, at the joint
between the two courses (illlustration a).
Use a combination of one length of J-channel and one
length of drip cap (illustration b).
Use a double channel lineal and flashing where required.
If using J-Channel
Snap a chalk line parallel to the bottom J-channel, at a
height equal to the length of the lower panel plus an
allowance for expansion. For example, if the lower panel
is 144" long and you’re adding 1/2" for expansion
(because the temperature is above 40° F), you strike a
line 144-1/2" from the bottom J-channel. Nail inverted
J-channels along this line to receive panels from below.
Leave a 1/4" gap between J-channel and cornerposts.
Overlap J-channels 3/4".
Prepare for the second course by applying head flashing
above the just-installed J-channel. Then nail J-channel
over the flashing to receive the upper panel.
NOTE: Some installers prefer to use formed
aluminum flashing in place of vinyl drip cap as the
receiving channel for the lower panel. This is also an
acceptable approach.
Installing J-channel at Gable Ends
If using double channel lineal: Measure the length of
the lower panel, then add an allowance for expansion.
Snap a chalk line parallel to the bottom J-channel, at a
height equal to your measurement. Position the lineal so
the interior peak of the lower channel runs along the
chalk line. Nail.
Leave a 1/4" gap
between lineal
and cornerposts.
Where required,
overlap lineals 1".
Whenever lineals
are overlapped,
you must insert
flashing into the
upper channel, or
provide additional
means of flashing.
Nail in place.
Installing Window and Door Trim
To trim windows and doors, install J-channel along the
top and sides of the door casings and around windows.
If you are installing J-channel around replacement
windows that do not have nail flanges, flash the window
before you trim it. Also, for best results, use aviation
snips when cutting the J-channel.
Before you begin to miter cut the corners, make sure the
J-channel is cut to the proper length. Leave the proper
allowance for the width of the face of the J-channel.
Then:
1. Square cut the bottom J-channel so that its ends
extend beyond the window casing to the width
of the face of the J-channels.
2. Notch the ends for clearance.
3. Position and fasten the bottom J-channel.
Board & Batten Installation Instructions | 2 of 3
F-receiver
soffit
J-channel
vertical
siding
soffit
J-channel
vertical
siding
vertical
siding
J-channel
flashing
J-channel
vertical
siding
vertical
siding
J-channel
drip cap
vertical
siding
ab
double
channel
lineal
aluminum flashing
(required if lineals
are overlapped) or
provide additional
means of flashing
chalk
line