Installation Instructions

1/4"
1/4"
1/4"
roof flashing
J-channelcorner post
drip edgediverternail hem of
the siding panel
step
flashing
housewra
p
fascia
drip edge
kickout flashing
self-adhering
membrane
Measuring the width of the section to cut
1/4"
Measuring the height of the section to cut
Kickout flashing
Side wall flashing
Installing the top panel
Cutting and preparing the panel
Horizontal siding installation
Fitting under windows
To mark the section to be cut, perform the following:
● Hold the panel under the window and mark the width of the window opening on the panel.
Add approximately 1/4” to both sides to allow for expansion and contraction of the siding.
These marks represent the vertical cuts.
● Lock a small piece of scrap siding into the lower panel next to the window. This will be
used as a template for the horizontal cuts. Mark it 1/4” below the sill height.
● Transfer the horizontal measurement to the panel, which will be installed under the
window. Measurement may not be the same on both sides of the window.
● Cut the panel with tin snips and a utility knife.
The cut panel is now ready for installation under the window. Perform the following:
● Using a snap lock punch, punch the vinyl siding
along the cut edge every 6” so the raised tab is
on the outside face.
● Install undersill trim under the window, as a
receiver for the cut siding. Undersill trim is used
any time the top lock has been removed from
the siding. Furring may be needed to maintain
the face of the panel at the desired angle.
● Install the siding panel, making sure the
tabs (from the snap lock punch) lock into the
undersill trim.
Sidewall flashing at roof lines
● Install the siding panel, making sure the tabs (from the snap lock punch) lock into the
undersill trim.
● Run the siding until the last full course under the roof area.
● Cut a diverter from aluminum trim sheet, making sure it sits on the nail hem of the last
full course.
● Also make sure to slip it behind all J-channels and roof flashing (similar to flashing the
bottom of window detail).
● As an alternative to the diverter, create a “kickout” from metal flashing.
● Cut the next piece of siding, making sure the vertical lap falls behind the roof flashing
and roof J-channel.
● Cut a small piece of siding that will be placed on top of the previous piece of siding and
sits in the roof J-channel.
● Install the remaining course of siding. Water running behind the panel will be directed by
the diverter into the butt of the panel, draining out in the weep holes.
Note: “Kick-out flashing” is an additional flashing strip that extends beyond the edge of the
fascia that is required in some cold-climate localities.
Horizontal Siding Installation 2