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Sheathings
In new construction, apply sheathing first, then nail
accessories over it.
In home improvement projects, you can apply sheathing first,
as described above, or you can apply accessories first, then fit
sheathing and siding into accessory recesses.
The application method you choose determines the width of
the recess opening required. Use:
• 1/2" opening when applying accessories over sheathing
and installing siding with a panel projection of 1/2" or less.
• 3/4" opening when applying accessories over sheathing
and installing siding with a panel projection of 3/4" or less.
• 1-1/4" opening when applying accessories first and using
sheathing that’s less than 3/4" thick for sidings with a
panel projection of 1/2" or less. For sidings with a panel
projection of 5/8" or 3/4", use a sheathing that is 1/2"
thick or less.
Fasteners
Use only corrosion-resistant nails (aluminum, stainless or
galvanized roofing.) Nails should have a minimum head
diameter of 3/8". Staples should be a minimum of 16 gauge.
If screws are used, use non-corrosive, self-tapping, pan head
or washer head screws or oval head with countersunk washer
screws with at least 3/8" (9.5mm) diameter head, 1/8" (3mm)
diameter shaft, and at least 1-1/8" (29mm) long.
To determine the length of nail required, measure the thickness
of the sheathing material. Then add at least 3/4" to allow the
nail to penetrate the solid wood substrate (studs or existing
wood siding). For more secure fastening, add 1" to sheathing
thickness. The minimum nail size should be 1-1/2".
Example: If you’re applying siding over 3/4" sheathing, use
a nail at least 1-1/2" long (3/4" + 3/4").
To determine the quantity of nails required, complete the
following:
Total square feet of siding required: ___________
(if using aluminum nails) x .005
(if using galvanized roofing nails) x .01
Pounds of nails required: = ___________
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Wolverine Fit and Finish Installation Guide