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Welcome to Hardie 101

Basic TrainingBest Practices Version 6.2 – October 2012

By: Gary GriffithsSenior Installation Specialist

James Hardie Installation Team

Installation Best Practices 6.2

Products & Installation

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Please Follow Along in the Best Practices:

Pages 30 – 56 in the Canada HZ5 Best Practices Version 6.2

Pages 43 – 69 in the US HZ5 Best Practices Guide Version 7.0

Pages 41 – 73 in the US HZ10 Best Practices Guide Version 7.0

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HardieTrim Product Description

HardieTrim Boards Description -HardieTrim boards come finished with either the PrimePlus factory primer and sealer or with ColorPlus Technology. The ColorPlus coating is a factory applied, oven-baked finish available on a variety of James Hardie siding & trim products. See your local dealer for details and availability of products, colors, & accessories.

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HardieTrim HZ Boards - Product DescriptionDid You Know?

5/4 & 4/4 HardieTrim HZ Boards - 5/4, 4/4 HardieTrim HZ are decorative non-load bearing trim

products. Available in commonly-used nominal widths from 4” to 12”. 5/4 HardieTrim HZ is 1” thick x 12’ in Length with a flat

back and available in Rustic or Smooth finish. 4/4 HardieTrim HZ is ¾” thick x 12’ in Length with a flat

back and available in Rustic or Smooth finish. Typically used as Frieze, Rake, Window, Door, and Corner

Trim 5/4 & 4/4 HardieTrim boards may also be used to construct

Light Blocks, Column Wraps & Decorative Scroll Work.

NOTE: All Trim is to be installed before HardiePlank or HardieShingle products to

allow for proper moisture management.

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HardieTrim NT3 Boards - Product DescriptionDid You Know?

5/4 & 4/4 HardieTrim NT3 Boards - 5/4, 4/4 HardieTrim NT3 is a decorative non-load bearing

trim product. Available in commonly-used nominal widths from 4” to 12”. 5/4 HardieTrim NT3 is 1” thick x 12’ in Length with back

grooves for added strength & reduced weight. 4/4 HardieTrim NT3 is ¾” thick x 12’ in Length with back

grooves for added strength & reduced weight. Available ONLY in a Smooth Finish Typically used as Frieze, Rake, Window, Door, and Corner

Trim 5/4 & 4/4 HardieTrim boards may also be used to construct

Light Blocks, Column Wraps & Decorative Scroll Work.

NOTE: All Trim is to be installed before HardiePlank or HardieShingle products to

allow for proper moisture management.

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HardieTrim Batten Boards - Product DescriptionDid You Know?

HardieTrim Batten Boards - HardieTrim Batten Boards are a decorative non-load bearing

trim product. HardieTrim Batten Boards are ¾” thick, 2 ½” wide, and

come in 12’ lengths. Available in Smooth & Rustic Face Finish Texture See your local dealer for details and availability of product

colors and accessories.

16 ga Finish Nails

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HardieTrim Fascia Boards - Product DescriptionDid You Know?

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HardieTrim Accessories – Flat Tabs & Corner TabsDid You Know?

HardieTrim - Concealed Fastening Tabs

For Corners, Band Boards, Windows, & Door Trim Applications: HardieTrim can be installed with Flat Tabs (JH SKU 280154) &

Corner Tabs (JH SKU 280155) which provide concealed fastening.

Reducing the need for ColorPlus touch-up, and increasing the look of the ColorPlus Technology.

Only Flat & Corner Tabs can be used with HardieTrim boards to create a concealed fastening system. Engineered, & Coated Aluminum.

Additional framing may be required to ensure the Flat & Corner Tabs are fastened properly to the structure.

Special attention should be paid to the framing when using a sheathing that does not have the fastener holding equivalent to 7/16” OSB or ½” Plywood sheathing.

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General Fastening for Hardie Trim Tabs: Flat & Corner TabsSTEP 1:Attach Flat Tabs to the back side of the Trim with 4 – 18 ga ½” L x ¼” W narrow crown corrosion resistant staples, equally spaced in one row, positioned no closer than ½” from trim edges, using a pneumatic staple gun (Figure 7.1)

STEP 2:For wood frame construction, attach the trim to the building using 2 – 6d siding nails fastened through the Flat Tabs. ET&F or equivalent fasteners may be used to attach the Flat Tabs to Steel framed construction. (Figure 7.2)

Fastener spacing will vary based on application. Refer to specific sections in these instructions for required fastener spacing by application (window, band board, etc.). (Figure 7.17)

HardieTrim

Installation of HardieTrim HZ & NT3 using Trim Tabs

Fig 7.1

Fig 7.2

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Installation of HardieTrim HZ & NT3 using Trim TabsInstalling Hardie Trim Tabs: Corner Tabs – Page 1

Fig 7.3

Fig 7.41

Step 1:Attach Corner Tabs to the backside of the trim with 8 – 18 ga ½” L x ¼” W narrow crown corrosion resistant staples using a pneumatic staple gun. *Ensure the Corner Tabs are fastened tight and straight to the trim boards. (Figures 7.3)Step 2:For wood frame construction, attach the trim to the building with 2 – 6d siding nails fastened through the Corner Tabs. (Figures 7.4) *ET&F or equivalent fasteners may be used to attach the Corner Tabs to steel framed construction.

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Installation of HardieTrim HZ & NT3 using Trim TabsInstalling Hardie Trim Tabs: Corner Tabs – Page 2

TIP: Creating a Jig for the work station is recommended to ensure the corners are fastened securely and straight. (Figure 7.6)

*Attach a Corner Tab 1” from each edge & every 20” oc.

Fig 7.63

Min. 1” from End

Spaced every 20” oc

Fig 7.5

NOTE: If Desired put 4 – 16 ga Finish Nails Spaced Evenly along the outside corner of the trim to secure it prior to installing the Corner Tabs in the Jig. (Figure 7.6)

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Installation of HardieTrim HZ & NT3 using Trim TabsInstalling Hardie Trim Tabs: Flat Tabs – Around Windows, Doors & Other Openings

1) Always trim the opening prior to the installation of the siding (Figure 7.9). 2) Place one Flat Tab at each end of the trim and one Flat Tab every 16” OC. 3) Attach the HardieTrim & Flat Tabs around the opening as shown in Figures 7.7 & 7.8.

Fig 7.7 Fig 7.8

Fig 7.9

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Installation of HardieTrim HZ & NT3 using Trim TabsInstalling Hardie Trim Tabs: Flat Tabs – Installation on Band Boards

1) A Drip Flashing is Required over the HardieTrim when being installed in a horizontal application. (Figure 7.10)2) Place Flat Tab at the end of each piece of HardieTrim and one tab a maximum of 16” o.c. (Figure 7.11)3) The Flat Tabs should be attached to the trim in an alternating pattern . 16” oc alternating Top & Bottom of the Band

Board. (Figures 7.11 & 7.12)4) Terminate the ends of the Band Board into the Vertical HardieTrim or Miter Cut the Edges of the Trim at the Corners

of the Building.

Fig 7.11

Fig 7.10

Fig 7.12

Fig 7.13

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Hardie Trim Tab Fastener Table

Wind-Borne Debris Region: “Supplemental fasteners may be necessary when installing tabs in a Wind-Borne Debris Region, please call Technical Services at 800-942-7343 with any questions.”

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Fig 7.17

Installation of HardieTrim HZ without Trim TabsInstallation of Outside Corners: Pre-Built Corner InstallationCorners made from 5/4 or 4/4 HardieTrim boards should be pre-assembled before they’re installed. A pre-assembled corner looks better and makes the installation quicker.Step 1: Pre-Build the Corner Trim To join two pieces of 5/4 or 4/4 HardieTrim boards for a corner: Drive a (2”) 16 ga Corrosion-resistant finish nail (½”) in

from the edge & spaced (16”) apart along the length of the corner trim. (9) 16 ga finish nails per 12’ piece of HardieTrim.

Step 2: Fastening the Pre-Built Corner Trim to the WallTo Fasten (4”) Corners to the Wall: Drive one finish nail into each face of the corner with the

nails spaced (16”) apart. To Fasten (6”) Corners to the Wall: Drive a pair of finish nails into each face of the corner with

the nails spaced (16”) apart.Nails should be kept (3/4”) from the edges of the HardieTrim and (1”) from the ends.

Fig 7.15

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Fig 7.16

Installation of HardieTrim HZ without Trim TabsInstallation of Outside Corners: Weather Cuts When walls are more than (12’) high, splice corner boards together using weather

cuts of at least a 22.5o angle. The angle of the weather cut must slope downward and away from the building. Nail both boards to the building with the same attachment schedule as for pre-built

corners. Paint or Prime ALL Cut EdgesDO NOT Install ANY Trim products over James Hardie Siding.

Fig 7.18

Installation of Inside Corners: Single & DoubleInside Corners can be made with either a single 5/4 or 4/4 HardieTrim board in the corner, or with one board on each wall depending on the desired look.

NOTE: 5/4 HardieTrim is to be used with all James Hardie Siding Products in a butt-too installation method.4/4 HardieTrim is to be used over HardiePanel ONLY.

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Any width of 5/4 or 4/4 HardieTrim can be used for Band Board depending on the type of detail desired. When installing the band board, pay special attention

to the flashing details and allow for water egress. Make sure that the weather resistant barrier laps over

the flashing for a continuous drainage plane. Caulk between the underside of the band board and the

siding below. (where permitted by local building codes). Install an inverted “J” Trim for the last course of the lap siding to terminate into.

Maintain a min. (1/4”) gap between the horizontal flashing and the James Hardie Siding above it.

Do not caulk between the flashing and the siding above the band board.

If running HardiePlank or HardieShingle above the band board, make sure to use a starter strip just like below, to maintain the correct plank angle.

Small periodic gaps should be left in the starter strip to provide an escape route for excess moisture that may drain down behind the siding.

HardieTrim

Fig 7.19

Installation of HardieTrim HZ without Trim TabsInstallation of the Band Board:

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Installation of HardieTrim HZ without Trim TabsInstallation of the Band Board: ContinuedTo attach the Band Board to the building: How-to: Fastening the Band Board to the Wall1) Drive (2) two (2”) 16 ga corrosion resistant finish nails

every (16”) for (4”) and (6”) band boards. 2) For (8”) band boards, use (3) three (2”) 16 ga corrosion

resistant finish nails every (16”).3) For (12”) band boards, use (4) four (2”) 16 ga corrosion

resistant finish nails every (16”).Use bevel-cut splice joints of at least 22.5o to join long lengths of 5/4 or 4/4 HardieTrim together.

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Installation of HardieTrim HZ without Trim TabsHardieTrim Fastener Specifications: Recommended Fasteners for HardieTrim

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Installation of HardieTrim HZ without Trim TabsInstallation of the Window & Door Trim: Windows & Doors must be installed per the manufacturer’s instructions. Once the HardieTrim is installed, a drip flashing must be installed above

the trim & lapped under the weather resistant barrier correctly.Install HardieTrim around doors & windows using the “cap over” method, which means that the header or horizontal top piece of trim extends and caps over the vertical jamb legs on either side of the door or window. For windows, the bottom trim piece fits between the vertical jamb legs.For Cap-Over Trim Installation:1) Start by measuring the length of the bottom edge of the window. (not

including the nailing flange). Cut a piece of trim to that length and install it.

2) Next measure from the bottom of the installed trim to the top of the window. (not including the nailing flange). Cut two pieces of trim to that length and install them on either side of the window.

3) For the Cap, measure the distance from the outside edge of both vertical jamb legs. Cut a piece of HardieTrim and Install it.

For Doors the Process is the same except that it starts with the vertical side jamb legs. (Step 2)

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Installation of HardieTrim HZ without Trim TabsInstallation of the Window & Door Trim: Continued

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Installation of HardieTrim HZ without Trim TabsInstallation of HardieTrim - Rake & Fascia:

For Fascia and Rake board applications, James Hardie requires that ALL HardieTrim products be nailed over a solid wood or steel Subfascia.

James Hardie recommends that the fascia be no more than (2”) larger than the Subfascia. (e.g. Over a nominal 2x6 Subfascia, Install an (8”) fascia board (actual size 7 ¼”).

On longer Fascia runs, join HardieTrim with weather/bevel cuts a minimum of 22.5o miter is required.

A Drip Edge Flashing is required over HardieTrim Fascia

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Installation of HardieTrim HZ without Trim TabsInstallation of Frieze Board Trim:1) Install the HardieTrim Frieze Board direct to the wall or rainscreen.2) Run the HardiePlank or HardieShingle siding up to the frieze board and caulk the junction of the frieze board and siding (where

applicable by local building code) or Install an inverted “J” Channel for the HardiePlank or HardieShingle to tuck into at the underside of the Frieze or Band Board.

3) When using HardiePanel siding, it is acceptable to install the frieze board over the HardiePanel siding.4) If joints are necessary for longer runs, join the HardieTrim with a min. of a 22.5o bevel cut.5) Fasten the HardieTrim frieze board every (16”) using (2”) long 16 ga non-corrosive finish nails.

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Installation of HardieTrim BattensGetting Started: Did you Know?

HardieTrim Battens are intended to be used with HardiePanel vertical siding to achieve a board and batten look.

HardieTrim Battens must be attached to the HardiePanel while still penetrating into wood or steel framing.

Use ONLY approved fasteners from the HardieTrim fastener specification table.

Step 1: Installing HardieTrim Battens1) Determine your desired layout (Over Framing) and mark

top & bottom of the HardiePanel where the HardieTrim Battens will be installed.

2) To ensure the HardieTrim Battens are installed vertically and parallel to each other, Snap Chalk Lines (Blue Chalk Works Best) or Use a Level to draw straight vertical, parallel lines.

3) Center the HardieTrim Battens over the lines established in Step 2. Ensure the fasteners are a minimum of (¾”) from the edges, (1”) from ends, and a maximum of (16”) apart down the length of the HardieTrim Battens.

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HardieTrim Battens Fastener Specifications

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Installation of HardieTrim BattensGetting Started: Horizontal Joint Treatment – Did you Know?

Horizontal HardieTrim Batten joints must occur at the same location as the horizontal joints in the HardiePanel Siding.

How-to: Install Horizontal HardieTrim Batten Joints

Option 1: No Horizontal Band BoardIf HardieTrim Battens are going to be installed over the horizontal HardiePanel joints without the use of a horizontal band board, follow the procedure as illustrated in fig. 7.29.1) Start Installing HardieTrim Battens

by creating a 22.5o weather-cut, making a joint at the same location as the panel joint.

2) Attach the Bottom Batten First. 3) Make sure the Top Batten has a

matching 22.5o weather-cut, then install the Top Batten.

Fig 7.29

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Installation of HardieTrim BattensGetting Started: Horizontal Joint Treatment – Did you Know?

Horizontal HardieTrim Batten joints must occur at the same location as the horizontal joints in the HardiePanel Siding.

How-to: Install Horizontal HardieTrim Batten Joints

Option 2: With a Band BoardIf HardieTrim Battens are going to be installed over the horizontal HardiePanel joints with the use of a horizontal band board, follow the procedure as illustrated in fig. 7.30.If HardieTrim Battens are to be installed horizontally, they must be installed in the same manner as in fig. 7.30.1) Attach the bottom batten tight to

the bottom edge of the band board.2) Leave a Min. (¼”) gap above the

horizontal Z-flashing,.3) Cut & Install the Top Batten.

Fig 7.30

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HardieTrim NT3 Installation Requirements

Please Reference the Installation Requirements found on:

Pages 53 – 57 in the US HZ5 Best Practices Guide Version 7.0

&

Pages 57 – 61 in the US HZ10 Best Practices Guide Version 7.0

&

Pages 40 – 44 in the Canada HZ5 Best Practices Version 6.2

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HardieTrim HZ Installation Requirements

Please Reference the Installation Requirements found on:

Pages 58 – 63 in the US HZ5 Best Practices Guide Version 7.0

&Pages 51 – 56 & 62 – 67 in the US HZ10 Best Practices Guide Version 7.0

&Pages 45 – 50 in the Canada HZ5 Best Practices Version 6.2

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HardieTrim HZ5 Battens Installation Requirements

Please Reference the Installation Requirements found on:

Pages 64 – 69 in the US HZ5 Best Practices Guide Version 7.0

&Pages 68 – 73 in the US HZ10 Best Practices Guide Version 7.0

&Pages 51 – 56 in the Canada HZ5 Best Practices Version 6.2

Installation Best Practices 6.2

Begin theHardieTrim Installation Requirements

Knowledge Test

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HardieTrim Installation Requirements:

1. When nailing trim boards, keep nails ____? 

a) ¼” from the edge and ¼” endsb) ½” from the edge and ½” endsc) ¾ “ from the edge and 1” endsd) Does not matter.

2. When installing a horizontal band board a piece of horizontal flashing must be used above the trim? 

a) Trueb) False

3. When you have corner trim extending multiple floors without a break, how should you join those vertical trim pieces?

 

a) Splice boards using a 22.5 degree angle sloped away from the wall.

b) Join using factory ends.c) Splice boards using a 45 degree angle.d) Splice boards using a 22.5 degree angle slope towards the wall.

4. What is the recommended fastener for nailing HardieTrim? 

a) 2” long, 16 gauge corrosion resistant finish nailb) 2” long, 6d corrosion resistant siding nailc) 1 ¾” long, 11gauge corrosion resistant  roofing naild) 2” long, 18 gauge corrosion resistant  finish nail

5. The “Cap Over” method (installing the longest piece of trim the head piece over the two jamb legs) is recommended for trimming around windows & doors?

 

a) Trueb) False

6. At what point in the Siding Process is the Trim Installed? 

a) All Trim gets installed BEFORE the Siding Installationb) All Trim gets installed AFTER the Siding Installationc) Corner Trim on After Siding & Window/ Door Trim Before Sidingd) Window/Door Trim on After Siding & Corner Trim Before Sidinge) Depends on the Project

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12 Critical Details to a Quality Installation Page 13 in your

Best Practices Guide.

All 12 items are Critical to the Long Term Quality, Durability and Installation Compliance.

Most Important Page in your Best Practices Guide

General Installation Requirements