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CertainTeed Vinyl Siding Installation Guide
80
Section 8 – Installing Vertical Siding (Including Board & Batten)
Preparing Wall Surfaces
For the most part, the wall preparation instructions given for
horizontal siding also apply to vertical applications. The key
requirement, of course, is that you start with a smooth, level and
rigid substrate (plywood, wood composite, rigid foam or fiber
sheathing).
NOTE: Never install vinyl siding over open furring strips or
studs. Always check with your local building code official.
With vertical siding, however, you may have to complete an extra
step to provide solid nailing points along the vertical edge of the
siding panel. The need for this added step depends on the type
of substrate used and the nature of the construction project.
With new construction or remodeling using plywood or wood
composite, there are no additional steps. You can nail into
plywood and wood composite substrates at any point as long
as you do not exceed 12" on center.
In new construction using rigid foam or fiber sheathing, you must
install solid wood nailer strips horizontally to studs before applying
sheathing. Use 1" x 3" wood furring positioned 12" o.c.
When remodeling over existing wood siding, you must apply
rigid foam or fiber sheathing, shimming if necessary to create
a level surface.
When remodeling over brick, block, stucco or irregular wall
surfaces, apply furring strips horizontally to create a level surface;
then apply rigid foam or fiber sheathing. See “Tips for applying
wood furring” on pages 31 to 32 and “Applying over stucco”
on page 32. When reviewing the illustrations for those sections,
remember that furring strips must be applied horizontally.
Marking a base line
The procedure is virtually the same as that described earlier.
However, instead of snapping a chalk line 2-1/4" above the low
point, snap it 1" above the low point.
NOTE: When installing vertical siding in high wind areas,
position the fasteners at the top two nail slots of the panel.
See pages 130 to 132 for installing CedarBoards Insulated
Vertical siding.
upper edge of topmost
nailing slot
nail to furring
1" x 3" furring
always position
topmost nail in
topmost full nail
slot with vertical
applications
1/2" foam sheathing
center nail in slots
12"
12"