Installation Instructions

Last full siding panel on the top of the wall
1/4"
1"
splicing undersill trim
Splicing of the undersill trim
Measuring the height to cover
Preparing the top panel
Installing the top panel
dual undersill
trim
punched
snap lock
with a panel cut here,
insert panel
nail slot
punch
to secure
frieze plate
snap-in crown
mold
Top panel installation
using dual undersill trim
dual undersill
trim
punched
snap lock
with a panel cut here,
insert panel
nail slot
punch
to secure
frieze plate
snap-in crown
mold
Top panel installation using
frieze plate and crown mold
Horizontal siding installation
Under eave installation
● Nail undersill trim along the top of the wall, flush with the eave of the
house. Furring may be necessary to maintain the proper pitch of the
topmost siding panel. Should more than one length of undersill trim be
required, make a splice as shown by cutting away 1” from the back of
the undersill trim and lapping the sections, leaving a 1/4” space between
nailing strip sections.
● If topmost siding panel is trimmed near the butt leg, an undersill trim
alone may not be sufficient.
● Either combine an undersill trim inside a J-channel, or use an undersill
trim molding to hold the siding panel firmly.
● A dual undersill trim molding replaces the need for both a J-channel and
undersill molding. Simply place the snap-lock punched top panel in the
appropriate receiving pocket to keep the proper siding angle.
● Another alternative to finishing the top panel of a wall is to use a frieze
plate and crown molding. Secure frieze plate (either with or without a
soffit receiver), no more than 16” on center. Allow 1/4” between adjoining
frieze plates.
● Using a nail slot punch, create nail slots every 12” - 16” in the top panel
of siding and secure normally. Finish the application by cutting crown
moldings to length as needed, and snapping them into the frieze plate
receivers.
Fitting and installing top siding panel
● Measure and cut siding panel to the desired length.
● Determine how much of the top panel must be removed by measuring the
distance between the top of the undersill trim and the lock of the panel
below, and subtracting 1/4”. Be sure to measure several times across the
wall as the dimension could change slightly.
● Cut the top siding panel to proper height, removing the nailing strip.
● Using a nail slot punch, create nail slots every 12” - 16” in the top panel
of siding and secure normally.
● Finish the application by cutting crown moldings to length as needed,
and snapping them into the frieze plate receivers.
Horizontal Siding Installation 3