Installation Guide

ManualsBrandsJames Hardie ManualsSoffit217527

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 preserva-

tive-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 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).

• NOTE: Whenever a structural member is present, HardiePlank should be fastened with

even spacing to the structural member. The tables allowing direct to OSB or plywood

should only be used when traditional framing is not available.

HardieSofﬁt

Panels

SF1204 P2/3 04/19

Figure 5

• For wood frame construction a minimum 4d common nails spaced 8 in o.c. at

panel edges and intermediate framing members spaced up to 24 in on center are

suitable in most locations*.

• For conventional 20ga - 16ga steel frame construction a minimum No. 8-18 x

0.323 in HD x 1 in long ribbed bugle screws spaced 6 in o.c. at panel edges and

intermediate framing members spaced up to 24 in 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

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 5

Maintain a minimum 1 in gap between

gutter end caps and siding & trim.

fascia

siding

1 in min.

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.”

3/8 in from edge of sofﬁt

keep fasteners

2 in away

from corners

24” o.c. max.

Figure 4

Greater than

12 in Wide Sofﬁt

Figure 3

1 in from end of sofﬁt

3/8 in from edge of sofﬁt

less than or equal to

12 in Wide Sofﬁt

ALUMINUM

CLIPPED

STAPLES

HEAD NAILS

FASTENERS

UNDER

DRIVE

OVER

DRIVE

SLANT

IF, THEN IF, THEN ADDITIONAL NAIL

WOOD

FRAME

HAMMER

FLUSH

REMOVE &

REPLACE

COUNTERSINK

& FILL

STEEL

FRAME

FACE

NAIL

DO NOT DO NOT

DO NOT USE

SNUG FLUSH