Installation Guide

83
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).
Figure A
Figure B
SF1205-P3/4 6/13
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.
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.”
• Consult applicable code compliance report 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.
FASTENER REQUIREMENTS
• 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.
PAINTING
DO NOT use stain, oil/alkyd base paint, or powder coating on James Hardie
®
Products.
James Hardie products must be painted within 180 days for primed product and 90 days for unprimed. 100% acrylic topcoats are recommended.
Do not paint when wet. For application rates refer to paint manufacturers specifications. Back-rolling is recommended if the siding is sprayed.
Countersink,
Fill & Add Nail
CAULKING
For best results use an Elastomeric Joint Sealant complying with ASTM C920 Grade NS, Class 25 or higher or a Latex Joint Sealant complying with
ASTM C834. Caulking/Sealant must be applied in accordance with the caulking/sealant manufacturer’s written instructions. Note: OSI Quad as well
as some other caulking manufacturers do not allow tooling.
CUT EDGE TREATMENT
Caulk, paint or prime all field cut edges. James Hardie touch-up kits are required to touch-up ColorPlus products.