Installation Guide

114
HS1237-P2/3 8/13
Figure 5
Figure 7
Figure 11
Figure 10
Figure 6
Self-adhering
membrane
Step flashing
Housewrap
Drip edge
Kickout
flashing
Self-adhering
eaves membrane
joist
2" min.
water
resistive
barrier
siding
flashing
deck material
ledger
Figure 8
2" min.
6" min.
bottom
plate
siding
stud
concrete
foundation
2" min.
Figure 9
CLEARANCES
Install siding and trim products in
compliance with local building code
requirements for clearance between
the bottom edge of the siding and
the adjacent finished grade.
Maintain a minimum 2"
clearance between
James Hardie
®
products and paths,
steps and driveways.
Maintain a minimum 2" clearance
between James Hardie products
and decking material.
At the juncture of the roof and vertical
surfaces, flashing and counterflashing
shall be installed per the roofing
manufacturer’s instructions. Provide a
minimum 2" clearance between the
roofing and the bottom edge of the
siding and trim.
Maintain a minimum 1" gap
between gutter end caps and
siding & trim.
KICKOUT FLASHING
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.
Figure 11, 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
GENERAL FASTENING REQUIREMENTS
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 applicable product evaluation or listing for correct fastener type and placement to achieve
specific 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 nail 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).
• NOTE: Whenever a structural member is present, HardiePlank should be fastened with even
spacing to the structural member. The tables allowing direct to OSB orplywood should only be
used when traditional framing is not available.
• Do not use aluminum fasteners, staples, or clipped head nails.
fascia
siding
1"
gutter and end cap
Framing
Flooring
Horizontal
Trim
Water-
Resistive
Barrier
Sheathing
R
HardiePanel
Do not bridge floors with HardiePanel
®
siding. Horizontal
joints should always be created between floors (fig. 10).
Maintain a 1/4"
clearance between
the bottom of James
Hardie products and
horizontal flashing.
Do not caulk gap.
Refer to fig. 3 on
page 1.
Figure A
Figure B
Countersunk,
ll & add nail
PNEUMATIC FASTENING
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).
BLOCKED PENETRATIONS
Penetrations such as hose bibs and holes 1 ½” or larger such as dryer vents
shall have a block of trim around point of penetration.