Installation Guide
49
vertical siding installation
1"
Remove
1/4˝ 
Fig.1
Fig. 2
Preparation
Step 1
Install a solid, nailable sheathing prior 
to applying vertical siding, if needed, 
to level the surface or provide suf-
ficient material for proper fastener 
penetration. Use minimum 7/16˝ 
plywood, OSB or equivalent.
Step 2
Snap a level chalkline around the 
base of the sidewalls. Typically, the 
chalkline is positioned so that the bot-
tom of the J-Channel is 1/4˝ below 
the lowest point on the wall that 
will be sided. (See the “Installing 
Accessories” section for tips on snap-
ping a chalkline.) Install a J-Channel 
along the chalkline as a receiver for 
the vertical siding.
Installation
Step 1
Install vinyl outside corner posts, 
inside corner posts, and door/window 
trim, and/or J-Channel as needed. 
See previous sections for corner post 
installation techniques.
Step 2
Install top and bottom J-Channel: 
Apply J-Channel along the top and 
bottom of the walls to receive the  
siding panels (Fig. 1).
A Install the bottom J-Channel. 
Overlap J-Channels 3/4˝. To do this, 
cut out a 1˝ section of the nailing 
flange and face return (see Fig. 2).
B Install inverted J-Channel along  
the top of the wall, under the eave and 
the gable. Overlap J-Channels 3/4˝ to 
allow for expansion.
NOTE: If you’re going to install soffit, you 
may want to install the receiving channels for 
the soffit prior to this point.
When installing vertical siding, follow these steps:










