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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 87 – 97 in the Canada HZ5 Best Practices Version 6.2

Pages 106 – 113 in the US HZ5 Best Practices Guide Version 7.0

Pages 107 – 114 in the US HZ10 Best Practices Guide Version 7.0

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HardiePanel Product DescriptionWhat is HardiePanel?HardiePanel Vertical Siding is a factory-primed fiber cement siding available in a variety of sizes and textures. Textures include Smooth, Stucco, Cedarmill & Sierra 8. HardiePanel like many other James Hardie Products is also available with ColorPlus Technology. The ColorPlus coating is a factory applied, oven baked finish available in a standard 20 colors. HardiePanel vertical siding is 5/16”-in. thick and is available in 4x8, 4x9, & 4x10 sizes. Please see your local James Hardie Dealer for textures and sizes available in your area.

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HardiePanel Profiles

Stucco - HardiePanel

Cedarmill - HardiePanel

Sierra 8 - HardiePanel

Smooth - HardiePanel

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HardiePanel Vertical Siding Installation- Getting Started -

First Locate the Lowest Point of the Sheathing or Sill Plate, and Begin Installation on that Wall.1. Measure up from the sill plate the height of the panel at either end of the

wall - snap a straight, level chalk line between the marks as a reference line. That line is for guidance in positioning the top edge of the panels. Check the reference line with a min. 4’-ft level.

2. Starting on one end and working across the wall, measure and trim the first panel making sure that the edge falls in the middle of a stud.

3. Position the panels top edge on the chalk line and secure it with suitable fasteners and fastener spacing for the particular application as noted in the ESR-1844 Report.

4. As installation continues, check the vertical edge of each panel with a min. 4’-ft. level to ensure panels are plumb & level.

TIP: Install Flashing Over the Footing/Foundation & Extend the Panel Over the Flashing just below the Sill Plate. Do Not

Extend Siding Beyond the Required Grade Clearance.

TIP: For Sierra 8 Panels, Double Studs are Required at Each Vert. Joint.

TIP: Blue chalk is Recommended because it washes off. DO NOT use Red or Black chalk they are considered permanent and may bleed through lighter colored paints.

16”-in.oc

8”-in. oc

TIP: Verify Wind Load Requirements for Fastener Spacing

– ESR-1844.

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HardiePanel Vertical Siding InstallationDid You Know?

Vertical Joint Treatment –All Vertical Joints in HardiePanel Vertical Siding MUST be treated using one of the following Four Joint Treatments:

2. Leave an 1/8” inch gap between Panels and fill with caulk. Caulking MUST be a high quality paintable, permanently flexible caulking that meets ASTM C-834 or C-920 Requirements.

1. Install the Panels in Moderate Contact with Joint Flashing. Joint Flashing is typically a 6”-in. strip of weather resistant barrier (house wrap).

TIP: As an option, install the first panel and apply a bead of caulk along the vert. panel

edge. Install the next panel against the first, making sure to embed the edge in the applied

caulk creating a thorough seal between the edges of the two panels.

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HardiePanel Vertical Siding InstallationDid You Know?

Vertical Joint Treatment – ContinuedAll Vertical Joints in HardiePanel Vertical Siding MUST be treated using one of the following Four Joint Treatments:

4. Metal or PVC “H” Moldings can be used to Join Two Vertical Sections of HardiePanel Siding.

3. Vertical Joints may be Covered with Wood or Fiber Cement Batten Strips. Batten Strips MUST Span the Vertical Joint by at least ¾”-in. on each side.

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Recommended Fasteners -HardiePanel – Traditional

DesignBattened Vertical

Joint

Trimmed Vertical Joint

Moderate Contact Vertical Joint

Fastener Requirements

• Utilize fasteners and fastener spacing as prescribed in the HardiePanel installation instructions and the ESR-1844 or as governed by code.

• Do not countersink or overdrive fasteners. Fasteners shall be flush with panel surface.

• For Traditional Design HardiePanel - Fastening into wood - use the recommended Nail.

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16” oc Horizontally

8” oc Vertically

(4-ft.) 48”-in.

(8-ft.)96”-in.

TIP: Verify Project Specific Wind Load Requirements for HardiePanel

Fastener Spacing – ESR-1844.

* Unless Otherwise specified by the Engineer of Record

Recommended Fastener Spacing -HardiePanel – Traditional Design

Stucco PanelModerate Contact Vert. Joints

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Fastener Requirements

• Utilize fasteners and fastener spacing as prescribed in the HardiePanel installation instructions and the ESR-1844 or as governed by code.

• Do not countersink or overdrive fasteners. Fasteners shall be flush with panel surface.

• For ColorPlus products use an exposed stainless steel screw.

Extruded Aluminum

Horizontal Trim

Min. 3/8”Furring Strips

WRB – Weather Resistant

Barrier

HardiePanel

Extruded Aluminum Vertical “H” TrimExtruded Aluminum

Horizontal TrimExposed Fasteners

Recommended Fasteners - HardiePanel – Non-Traditional Design

HardiePanel with Expressed Joint Trim Fasteners

HardiePanel with

Expressed Joint Trim

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16” oc Horizontally

8” oc Vertically

(4-ft.) 48”-in.

(9-ft.)108”-in.

TIP: Verify Project Specific Wind Load Requirements for HardiePanel

Fastener Spacing – ESR-1844.

Master Drillers

Master One SteppersThermal Expansion Fasteners

Smooth PanelExpressed Vert. Joint Trim

TW-S 300 Series* Unless Otherwise specified by the Engineer of Record

Recommended Fastener Spacing - HardiePanel –

Non-Traditional Design

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HardiePanel Vertical Siding Installation- Horizontal Joint Treatment -

In some applications such as multi-story structures or at gable ends, it may be necessary to stack HardiePanel siding. ALL Horizontal Joints created Between Panels MUST be Flashed Properly to Minimize Water Penetration.

Treat Horizontal Panel Joints by using one of the Following Methods:

After Installing the Lower Course of Panel Siding, Install Vinyl, Coated Aluminum, or Coated Steel “Z” Flashing at the Top Edge of the Panel.

As an Alternative, if a Horizontal Band Board is used at the Horizontal Joint, Flashing MUST Extend Over the Panel Edge & Trim Attachment.

NOTE: ALL Horizontal Flashing MUST be Cut-In Behind the (WRB) Water-

Resistive Barrier.

Install the Second Course or gable panels Leaving a ¼”-in. Minimum Gap between the Bottom of the Panel and the “Z” Flashing. (This Gap Should NEVER be Caulked.)

Min. 15o

Positive Slope

NOTE: ALL Horizontal Flashing MUST be Installed with Positive Slope - Sloping Away from the Building & NOT Sitting Flat on the Top Edge of the HardiePanel

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HardiePanel Vertical Siding Installation- Layout Options -

When Laying Out your HardiePanel Installation, there are Two (2) Layout Options. These Two (2) Layout Options are:

1. For the Most Symmetrical Look, Plan the Installation so that a Full Panel is Centered on the Wall or Gable with Equal-Size Panels Cut for Each End.

TIP: These strategies might entail a center-out framing layout.

Item #1:Center Panel Out

Item #2:Center Seam Out

2. As an Alternative – Plan the Installation so that a Full Panel is located on Either Side of the Walls Center Line. leaving Equal Size Panels on Each End.

TIP: Choose the strategy that looks the best and uses material the most efficiently.

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HardiePanel Vertical Siding Installation- Windows, Doors, & Other Wall Penetrations -

In Panel Installations, Trim is Typically Overlaid on Top of the Panels. Special Attention needs to be paid to Trim Flashing at the Tops of the Openings.

Below is One Method for Properly Flashing Trim in a Panel Application:

1. After Installing the Window, Cut and Install a ¼”-in. Thick Shim above the Window. The Shim should be the Same Height as the Trim, but only as Long as the Width of the Window.

2. Over the Shim - Install Flashing (wide enough to cover the thickness of the trim & long enough to cover the window head trim.)

2 – Install Flashing Over

the Shim & Under the Water-Resistive Barrier.

Flashing

Shim

1 – Install ¼”-in. thick Shim Over the Window

Finished Installation

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HardiePanel Vertical Siding Installation- Windows, Doors, & Other Wall Penetrations -

3. Install the Panel to the Window & Around the Shim (taking care not to damage the flashing). Leave a Min. ¼”-in. Gap between the Panel & the Horizontal Part of the Flashing.

4. Install the Trim around the Windows, Slipping the Head Piece Under the Installed Flashing.

Cut & Fit HardiePanel

Installation Continued…

3 – Cut & Fit Panel around the Shim & Flashing – Leave Min. ¼”-in. Gap Between

the Flashing & the Upper Panel Edge.

4 – Install Window Trim Under the Flashing

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HardiePanel Vertical Siding Installation- Rain Screens -

Rainscreen Requirements: James Hardie REQUIRES a minimum 3/8” drained & ventilated cavity, to serve as a

capillary break, in the application of Multifamily and Commercial Construction.

Installation of HardiePanel Over Furring -

The Capillary Break shall be installed between the Cladding and Code Approved (WRB) water-resistive barrier.

Furring Fasteners MUST be designed to Support Cladding Weight.

Furring MUST be Attached Vertically and MUST be Adequately Fastened to the Structural Framing with a suitable fastener.

Furring shall be a minimum 3/8” thick and sized to provide adequate substrate to cladding connection; a nominal 1.5” in width would be the minimum.

TIP: James Hardie Does NOT

Recommend Drainage Mats or

Drainage Boards in this Application.

6” Reinforced Mesh Bug Screen

Rainscreen Strapping (Furring)Installed @ 16”-in. OC

Double Up the Strapping (Furring) @ Trim Locations

.089” x .221” x 2” Siding Nail

½” x 1.5” Pressure Treated Plywood Strapping (Furring)

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HardiePanel Vertical Siding Installation- Rain Screens -

Fastener Requirements:When installing James Hardie Siding Products over furring the question arises what thickness of furring can be used as an alternate to normal metal or wood studs specified in the ESR-1844 & 2290 Report?

General Rule of Thumb is, the specific ESR-1844 & 2290 fastener must be installed into material that has the same or better holding power than that specified in the ESR-1844 &2290 and the same penetration as the ESR-1844 & 2290 fastener.

Installation of HardiePanel Over Furring -

Double Up the Strapping (Furring) @ Trim Locations

Rainscreen Strapping (Furring)Installed @ 16”-in.

OC

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HardiePanelInstallation Requirements

Please Reference the Installation Requirements found on:

Pages 111 – 113 in the US HZ5 Best Practices Guide Version 7.0

&Pages 112 – 114 in the US HZ10 Best Practices Guide Version 7.0

&Pages 94 – 97 in the Canada HZ5 Best Practices Version 6.2

Installation Best Practices 6.2

Begin theHardiePanel Installation Requirements

Knowledge Test

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HardiePanel Installation Requirements:

1. What is the correct method for treating a horizontal joint? 

a) Stack in moderate contactb) Leave a gap and caulkc) Use an “H” Trimd) Install a vinyl or coated aluminum “Z” flashing at the top edge of 

the panel.

2. It is acceptable to bridge floors with panel siding?

a) Trueb) False

3. What are the proper methods for treating vertical joints? 

a) Butt factory ends in moderate contactb) Leave an appropriate gap and caulkc) Cover with batten stripsd) Use a metal or PVC “H” molding e) All of the Above

4. What is the appropriate gap that should be left between a panel and horizontal flashing.

 

a) ¼” gap and no caulkb) ¼” gap with caulkc) ½” inch no caulkd) No gap should be left

5. All HardiePanel edges of must break on solid framing? 

a) Trueb) False

6. The required fastening pattern for HardiePanel without a structural engineer of record prescribing a project specific fastening pattern is what?

 

a) 12” oc vertically into structural framingb) 24” oc vertically into structural framingc) 16” oc vertically into structural framingd) 8” oc vertically into structural framing

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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