HardiePlank® Lap Siding
EFFECTIVE SEPTEMBER 2019
IMPORTANT: FAILURE TO FOLLOW JAMES HARDIE WRITTEN INSTALLATION INSTRUCTIONS AND COMPLY WITH APPLICABLE BUILDING CODES MAY VIOLATE LOCAL LAWS, AFFECT
BUILDING ENVELOPE PERFORMANCE AND MAY AFFECT WARRANTY COVERAGE. FAILURE TO COMPLY WITH ALL HEALTH AND SAFETY REGULATIONS WHEN CUTTING AND INSTALLING
THIS PRODUCT MAY RESULT IN PERSONAL INJURY. BEFORE INSTALLATION, CONFIRM YOU ARE USING THE CORRECT HARDIEZONE® PRODUCT INSTRUCTIONS BY VISITING
HARDIEZONE.COM OR CALL 1-866-942-7343 (866-9-HARDIE)
CUTTING INSTRUCTIONS
STORAGE & HANDLING:
Store flat and keep dry and covered prior to
installation. Installing siding wet or saturated may
result in shrinkage at butt joints. Carry planks on
edge. Protect edges and corners from breakage.
James Hardie is not responsible for damage caused
by improper storage and
handling of the
OUTDOORS
1. Position cutting station so that airflow blows dust away from the
user and others near the cutting area.
2. Cut using one of the following methods:
a. Best: Circular saw equipped with a HardieBlade
and attached vacuum dust collection system. Shears
(manual, pneumatic or electric) may also be used, not
recommended for products thicker than 7/16 in.
b. Better: Circular saw equipped with a dust collection feature
(e.g. Roan
c. Good: Circular saw equipped with a HardieBlade saw blade.
®
saw) and a HardieBlade saw blade.
®
saw blade
product.
IMPORTANT: The Occupational Safety and Health Administration (OSHA) regulates workplace exposure to silica dust. For construction sites, OSHA has deemed
that cutting fiber cement with a circular saw having a blade diameter less than 8 inches and connected to a commercially available dust collection system per
manufacturer’s instructions results in exposures below the OSHA Permissible Exposure Limit (PEL) for respirable crystalline silica, without the need for additional
respiratory protection.
If you are unsure about how to comply with OSHA silica dust regulations, consult a qualified industrial hygienist or safety professional, or contact your James
Hardie technical sales representative for assistance. James Hardie makes no representation or warranty that adopting a particular cutting practice will assure
your compliance with OSHA rules or other applicable laws and safety requirements.
IMPORTANT: To prevent damage to the drip edge, extra care should be taken when removing planks from the pallet, while handling, and when installing with a lap gauge. Please see
additional handling requirements on page 4.
INDOORS
DO NOT grind or cut with a power saw indoors. Cut using shears (manual, pneumatic or
electric) or the score and snap method, not recommended for products thicker than 7/16 in.
- DO NOT dry sweep dust; use wet dust suppression or vacuum to collect dust.
- For maximum dust reduction, James Hardie recommends using the “Best” cutting
practices. Always follow the equipment manufacturer’s instructions for proper operation.
- For best performance when cutting with a circular saw, James Hardie recommends
using HardieBlade
- Go to jameshardiepros.com for additional cutting and dust control recommendations.
®
saw blades.
GENERAL REQUIREMENTS:
• HardiePlank® lap siding can be installed over braced wood or steel studs, 20 gauge (33 mils) minimum to 16 gauge (54 mils) maximum, spaced a maximum of 24 in o.c. or directly to
minimum 7/16 in thick OSB sheathing. See General Fastening Requirements. Irregularities in framing and sheathing can mirror through the finished application. Correct irregularities
before installing siding.
• Information on installing James Hardie products over non-nailable substrates (ex: gypsum, foam,etc.) can be located in JH Tech Bulletin 19 at www.jamehardie.com
• A water-resistive barrier is required in accordance with local building code requirements. The water-resistive barrier must be appropriately installed with penetration and junction flashing
in accordance with local building code requirements. James Hardie will assume no responsibility for water infiltration. James Hardie does manufacture HardieWrap® Weather Barrier, a
non-woven non-perforated housewrap¹, which complies with building code requirements.
• Adjacent finished grade must slope away from the building in accordance with local building codes - typically a minimum of 6 in. in
the first 10 ft..
• Do not use HardiePlank lap siding in Fascia or Trim applications.
• Do not install James Hardie products, such that they may remain in contact with standing water.
• HardiePlank lap siding may be installed on flat vertical wall applications only.
• For larger projects, including commercial and multi-family projects, where the span of the wall is
significant in length, the designer and/or architect should take into consideration the coefficient of thermal expansion and
moisture movement of the product in their design. These values can be found in the Technical Bulletin “Expansion Characteristics
of James Hardie® Siding Products” at www.jameshardie.com.
• James Hardie Building Products provides installation /wind load information for buildings with a maximum mean roof height of 85
feet. For information on installations above 60 feet, please contact JH technical support.
INSTALLATION:
JOINT TREATMENT
One or more of the following joint treatment options are
required by code (as referenced 2009 IRC R703.10.2)
A. Joint Flashing (James Hardie recommended)
B. Caulking* (Caulking is not recommended
for ColorPlus for aesthetic reasons as the
Caulking and ColorPlus will weather differently.
For the same reason, do not caulk nail heads on
ColorPlus products.)
joint
flashing
water-
resistive
barrier
stud
Figure 2
Nail line (If nail line is not
present, place fastener
between 3/4 in. & 1 in.
from top of plank)
Nail 3/8 in. from
edge of plank
Install planks in
moderate contact
at butt joints
Leave appropriate gap between
planks and trim, then caulk.*
C. “H” jointer cover
Double Wall
Construction
water-resistive
barrier
plywood or
OSB sheathing
Figure 1
Single Wall
Construction
24 in. o.c. max.
fastener
Install a 1 1/4 in. starter strip to
ensure a consistent plank angle
let-in bracing
water-resistive
barrier
Note: Field painting over caulking may produce a sheen difference when compared to the field painted PrimePlus. *Refer to Caulking section in these instructions.
¹For additional information on HardieWrap® Weather Barrier, consult James Hardie at 1-866-4Hardie or www.hardiewrap.com
SELECT CEDARMILL© | SMOOTH | BEADED CEDARMILL© | BEADED SMOOTH
Visit jameshardiepros.com for the most recent version.
HS11117 P1/4 09/19
CLEARANCE AND FLASHING REQUIREMENTS
HardiePlank® Lap Siding
Figure 3
Roof to Wall
Figure 7
Deck to Wall
Z-Flashing
Figure 12
Drip Edge
Min. 2 in.
Min.
2 in.
Figure 4
Horizontal Flashing
Z-Flashing
Figure 8
Ground to Siding
Figure 13
Block Penetration
6 in.
Min. ¼ in.
Do not caulk
Figure 9
Gutter to Siding
Figure 5
Kickout Flashing
1in.
Figure 14
Valley/Shingle Extension
As required
by IRC code
min 4 in. x 4 in.
Figure 10
Sheltered Areas
Z-Flashing
Min. ½ in.
Figure 6
Slabs, Path, Steps to Siding
Min. 2 in.
Figure 11
Mortar/Masonry
L-Flashing
Z-Flashing
Min. ¼ in.
Min. ¼ in.
Z-Flashing
Min. ¼ in.
Do not caulk
FASTENER REQUIREMENTS*
Refer to the applicable ESR report online to determine which fastener meets your wind load design criteria.
Blind Nailing is the preferred method of installation for HardiePlank
be used in conjunction with Blind nailing (Please see JH Tech bulletin 17 for exemption when doing a repair).
BLIND NAILING
Nails - Wood Framing
• Siding nail (0.09 in. shank x 0.221 in. HD x 2 in. long)
• 11ga. roofing nail (0.121 in. shank x 0.371 in. HD x 1.25 in. long)
Screws - Steel Framing
• Ribbed Wafer-head or equivalent (No. 8 x 1 1/4 in. long
x 0.375 in. HD) Screws must penetrate 3 threads into metal framing.
Nails - Steel Framing
• ET & F Panelfast
Nails must penetrate minimum 1/4 in. into metal framing.
OSB minimum 7/16 in.
• Siding nail (0.09 in. shank x 0.215 in. HD x 1-1/2 in. long
• Ribbed Wafer-head or equivalent (No. 8 x 1 5/8 in. long x 0.375 in. HD).
®
nails or equivalent (0.10 in. shank x 0.313 in. HD x 1-1/2 in. long)
®
lap siding products. Face nailing should only be used where required by code for high wind areas and must not
FACE NAILING
Nails - Wood Framing
• 6d (0.113 in. shank x 0.267 in. HD x 2 in. long)
• Siding nail (0.09” shank x 0.221” HD x 2” long)
Screws - Steel Framing
• Ribbed Bugle-head or equivalent (No. 8-18 x 1-5/8 in. long x
0.323 in. HD) Screws must penetrate 3 threads into metal framing.
Nails - Steel Framing
• ET & F pin or equivalent (0.10 in. shank x 0.25 in. HD x 1-1/2 in. long)
Nails must penetrate minimum 1/4 in. into metal framing.
OSB minimum 7/16 in.
• Siding nail (0.09 in. shank x 0.221 in. HD x 1-1/2 in. long)
Extend shingles
at least 1 in.
out from the
fascia when
gutters are
present
*Also see General Fastening Requirements; and when considering alternative fastening options refer to James Hardie's Technical Bulletin USTB 5 - Fastening Tips for HardiePlank Lap Siding.
HS11117 P2/4 09/19
HardiePlank® Lap Siding
FASTENER REQUIREMENTS continued
24”
O.C. max
Nail Line
Water Resistive
Barrier
1 1/4” min.
Overlap
Stud
Blind Nail
Figure 14
min. 1 1/4 in.
overlap
Figure 15
Minimum overlap
for Both Face
and Blind Nailing
Joint
Flashing
Stud
3/4”-1”
24”
O.C. max
Face Nail
Water Resistive
Barrier
1 1/4” min.
Overlap
Laminate sheet to be removed immediately after installation of each course for ColorPlus® products.
Pin-backed corners may be done for aesthetic purposes only. Finish nails are recommended for pin-backs. Headed siding nails are allowed. Place pin-backs
no closer than 1 in. from plank ends and 3/4 in. from plank edge into min. 3/8 in. wood structural panel. Pin-backs are not a substitute for blind or face nailing.
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
humid climates.
®
products near the ocean, large bodies of water, or in very
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
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
SNUG FLUSH
DO NOT DO NOT
smooth faced hammer - Does not apply for
installation to steel framing).
DO NOT USE
• 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.
UNDER
DRIVE
IF, THEN IF, THEN ADDITIONAL NAIL
WOOD
FRAME
STEEL
FRAME
OVER
DRIVE
FACE
NAIL
SLANT
AL
ALUMINUM
FASTENERS
CLIPPED
HEAD NAILS
CUT EDGE TREATMENT
Caulk, paint or prime all field cut edges. James Hardie touch-up kits are required to
touch-up ColorPlus products.
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
HAMMER
FLUSH
REMOVE &
REPLACE
COUNTERSINK
& FILL
STAPLES
must be applied in accordance with the caulking/sealant manufacturer’s written instructions.
Note: some caulking manufacturers do not allow "tooling".
PAINTING
DO NOT use stain, oil/alkyd base paint, or powder coating on James Hardie® products. Factory-primed James Hardie products must be painted within 180 days of installation.
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.
HS11117 P3/4 09/19
HardiePlank® Lap Siding
COLORPLUS® TECHNOLOGY CAULKING, TOUCH-UP & LAMINATE
• Care should be taken when handling and cutting James Hardie ColorPlus® products. During installation use a wet soft cloth or soft brush to gently wipe off any
residue or construction dust left on the product, then rinse with a garden hose.
• Touch up nicks, scrapes and nail heads using the ColorPlus
If large areas require touch-up, replace the damaged area with new HardiePlank
• Laminate sheet must be removed immediately after installation of each course.
• Terminate non-factory cut edges into trim where possible, and caulk. Color matched caulks are available from your ColorPlus
®
Technology touch-up applicator. Touch-up should be used sparingly.
®
lap siding with ColorPlus® Technology.
®
product dealer.
• Treat all other non-factory cut edges using the ColorPlus Technology edge coaters, available from your ColorPlus product dealer.
Note: James Hardie does not warrant the usage of third party touch-up or paints used as touch-up on James Hardie ColorPlus products.
Problems with appearance or performance arising from use of third party touch-up paints or paints used as touch-up that are not James Hardie touch-up will not be covered
under the James Hardie ColorPlus Limited Finish Warranty.
PAINTING JAMES HARDIE® SIDING
COVERAGE CHART/ESTIMATING GUIDE
Number of 12 ft. planks, does not include waste
7 1/4
100
117
133
150
167
183
200
217
233
250
267
283
300
317
333
®
LAP SIDING WIDTH
7 1/2
6
6 1/4
17
33
50
67
83
112
128
144
160
176
192
208
224
240
256
272
288
304
320
8
104
119
133
148
163
178
193
207
222
237
252
267
281
296
8 1/4
15
30
44
59
74
89
6 3/4
16
32
48
64
80
96
100
114
129
143
157
171
186
200
214
229
243
257
271
286
9 1/4
9 1/2
7
14
29
43
57
71
86
100
113
125
138
150
163
175
188
200
213
225
238
250
8
13
25
38
50
63
75
88
8 1/4
100
113
125
138
150
163
175
188
200
213
225
238
250
12
10 3/4
13
25
38
50
63
75
88
HARDIEPLANK
SQ
(1 SQ = 100 sq.ft.)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
5 1/4
100
125
150
175
200
225
250
275
300
325
350
375
400
425
450
475
500
6 1/4
4
25
50
75
100
120
140
160
180
200
220
240
260
280
300
320
340
360
380
400
5
20
40
60
80
This coverage chart is meant as a guide. Actual usage is subject to variables such as building design.
James Hardie does not assume responsibility for over or under ordering of product.
102
112
121
130
140
149
158
167
177
186
9
19
28
37
47
56
65
74
84
93
AND TRIM PRODUCTS WITH
COLORPLUS
When repainting ColorPlus products, James
Hardie recommends the following regarding
surface preparation and topcoat application:
• Ensure the surface is clean, dry, and free of any
dust, dirt, or mildew
• Repriming is normally not necessary
• 100% acrylic topcoats are recommended
• DO NOT use stain, oil/alkyd base paint, or
powder coating on James Hardie
• Apply finish coat in accordance with paint
manufacturers written instructions regarding
coverage, application methods, and application
temperature
• DO NOT caulk nail heads when using ColorPlus
products, refer to the ColorPlus touch-up
section
®
TECHNOLOGY
®
Products.
ADDITIONAL HANDLING REQUIREMENTS
Pull from across the stack
Do not go down the stack
IMPORTANT: To prevent damage to the drip edge, extra care should be
taken when removing planks from the pallet, while handling, and
when installing with a lap gauge. Planks are interlocked together on
the pallet, therefore they should be removed from the pallet
horizontally (side to side) to allow planks to unlock themselves from
one another.
HS11117 P4/4 09/19
DANGER: May cause cancer if dust from product is inhaled. Causes damage to lungs and respiratory system through prolonged or repeated inhalation of dust from product. Refer to the current product Safety Data Sheet before use.
The hazard associated with fiber cement arises from crystalline silica present in the dust generated by activities such as cutting, machining, drilling, routing, sawing, crushing, or otherwise abrading fiber cement, and when cleaning
up, disposing of or moving the dust. When doing any of these activities in a manner that generates dust you must (1) comply with the OSHA standard for silica dust and/or other applicable law, (2) follow James Hardie cutting
instructions to reduce or limit the release of dust; (3) warn others in the area to avoid breathing the dust; (4) when using mechanical saw or high speed cutting tools, work outdoors and use dust collection equipment; and (5) if no
other dust controls are available, wear a dust mask or respirator that meets NIOSH requirements (e.g. N-95 dust mask). During clean-up, use a well maintained vacuum and filter appropriate for capturing fine (respirable) dust or use
wet clean-up methods - never dry sweep.
SILICA WARNING
WARNING: This product can expose you to chemicals including respirable crystalline silica, which is known to the State of California to cause cancer. For more information go to P65Warnings.ca.gov.
RECOGNITION: In accordance with ICC-ES Evaluation Report ESR-2290, HardiePlank® lap siding is recognized as a suitable alternate to that specified in the 2006, 2009, 2012 & 2015 International Residential Code for One and Two-Family
Dwellings, and the 2006, 2009, 2012 & 2015 International Building Code. HardiePlank lap siding is also recognized for application in the following: City of Los Angeles Research Report No. 24862, State of Florida Product Approval FL#13192,
Miami-Dade County Florida NOA No. 17-0406.06, U.S. Dept. of HUD Materials Release 1263f, Texas Department of Insurance Product Evaluation EC-23, City of New York MEA 223-93-M, and California DSA PA-019. These documents should
also be consulted for additional information concerning the suitability of this product for specific applications.
© 2019 James Hardie Building Products, Inc. All rights reserved TM, SM and ®
denote trademarks or registered trademarks of James Hardie Technology Limited.
Product warranties, safety information and additional installation
information are available at jameshardiepros.com
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