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CertainTeed Vinyl Siding Installation Guide
10
Nail flange
Flat area along top of panel with slots for nailing; slots
allow for expansion and contraction.
Lock
Molded area just under nailing flange into which butt
leg/locking leg of next panel above is secured.
Panel projection
Common to products with multiple faces (i.e. Double 4 or Triple 3).
It is the dimension required for the proper selection of receiving
channels (e.g., J-channels and corner pieces).
Butt leg/locking leg
The bottom part of a siding profile that connects or locks
into the panel below.
Panel Thickness
An important element of siding quality. Thicker panels are
more durable, stand up to impacts and high winds, and
look straighter on the wall.
Exposure
The width of the exposed face of each panel of siding;
also referred to as reveal.
Texture
Visual and tactile characteristics of the siding panel;
designed to recreate the authentic look of natural wood
grain, stucco, smooth painted clapboard, etc.
5"
5"
3"
3"
3"
7"
3/4"
7/16"
Profile
The contour or outline of a siding panel as viewed from the side.
Traditional Vinyl Siding Terms