Installation Guide

79
• For wood frame construction a minimum 4d common nails spaced
8" o.c. at panel edges and intermediate framing members spaced up
to 24" on center are suitable in most locations*.
• For conventional 20ga steel frame construction a minimum No. 8-18
x 0.323" HD x 1" long ribbed bugle screws spaced 6" o.c. at panel
edges and intermediate framing members spaced up to 24" on center
are suitable in most locations*.
*Minimum Basic Wind Speed differs by locality. Where specified levels
of wind resistance are required, refer to applicable Building Code
Compliance Reports.
FASTENER REQUIREMENTS
Figure 6
Self-adhering
membrane
Step flashing
Housewrap
Drip edge
Kickout
flashing
Self-adhering
eaves membrane
Because of the volume of water that can pour down a sloped roof, one
of the most critical flashing details occurs where a roof intersects a
sidewall. The roof must be flashed with step flashing. Where the roof
terminates, install a kickout to deflect water away from the siding. It is
best to install a self-adhering membrane on the wall before the
subfascia and trim boards are nailed in place, and then come back to
install the kickout.
KICKOUT FLASHING
Figure 6, Kickout Flashing To prevent water from dumping behind
the siding and the end of the roof intersection, install a "kickout" as
required by IRC code R905.2.8.3 : “...flashing shall be a min. of 4”
high and 4” wide.” James Hardie recommends the kickout be angled
between 100° - 110° to maximize water deflection
Fasteners must be corrosion resistant, galvanized, or stainless steel. Electro-galvanized
are acceptable but may exhibit premature corrosion. James Hardie recommends the
use of quality, hot-dipped galvanized nails. James Hardie is not responsible for the
corrosion resistance of fasteners. Stainless steel fasteners are recommended when
installing James Hardie
®
products near the ocean, large bodies of water, or in very
humid climates..
• Consult product evaluation or listing for correct fasteners type and
placement to achieve specified design wind loads.
• NOTE: Published wind loads may not be applicable to all areas where
Local Building Codes have specific jurisdiction. Consult James Hardie
Technical Services if you are unsure of applicable compliance documentation.
• Drive fasteners perpendicular to siding and framing.
• Fastener heads should fit snug against siding (no air space). (fig. A )
• Do not over-drive nail heads or drive nails at an angle.
• If nail is countersunk, fill hole and add a nail. (fig. B)
• For wood framing, under driven nails should be hit flush to the plank with a
hammer (For steel framing, remove and replace nail).
• Do not use aluminum fasteners, staples, or clipped head nails.
PNEUMATIC FASTENING
GENERAL FASTENING REQUIREMENTS
James Hardie products can be hand nailed or fastened with a pneumatic
tool. Pneumatic fastening is highly recommended. Set air pressure so that
the fastener is driven snug with the surface of the siding. A flush mount
attachment on the pneumatic tool is recommended. This will help control
the depth the nail is driven. If setting the nail depth proves difficult, choose a
setting that under drives the nail. (Drive under driven nails snug with a
smooth faced hammer - Does not apply for installation to steel framing).
Figure 5
Maintain a minimum 1" gap between
gutter end caps and siding & trim.
Figure A Figure B
fascia
siding
1"
gutter and end cap
Manufacturers of ACQ and CA preservative-treated wood
recommend spacer materials or other physical barriers to prevent
direct contact of ACQ or CA preservative-treated wood and
aluminum products. Fasteners used to attach HardieTrim Tabs to
preservative-treated wood shall be of hot dipped zinc-coated
galvanized steel or stainless steel and in accordance to 2009 IRC
R317.3 or 2009 IBC 2304.9.5.”
SF1204-P2/3 6/13
Countersink,
Fill & Add Nail