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Architectural Specifications

Hardiplank® Lap Siding
Hardipanel® Vertical Siding
HardishingleTM Cladding
Harditrim® Fascia and Moulding

Architectural Specification
Section 07460/HAR

NOTE TO SPECIFIER: This is a proprietary specification of James Hardie Building Products written in the Construction Specifiers Institute format. It is important to recognize that these recommendations are neither warranties, explicit or implicit, nor representative of the only method by which siding can be installed. Rather they try to summarize for the designer, installer or developer good building practice and some of the industry standards for the installation of siding which have been developed over a period of time from actual trade practice and the requirements of various building code agencies.

The following specification was developed for use within the jurisdiction of the Local Building Codes. Different or additional standards may be required in other jurisdictions and should be investigated accordingly.

Check with Local Building Code for installation requirements.

1. GENERAL

  1. Work under this section is subject to the provisions of the contract documents which in any way affect the work specified herein.

1.1 Scope

  1. Furnish and install Hardiplank, Hardipanel and Hardishingle fiber-cement siding, Harditrim fascia and moulding and accessories where shown on drawings or as specified herein.
  2. Coordinate this section with interfacing and adjoining work for proper sequence of installation.
  3. Work in other sections affecting this work.
    1. Steel framing and bracing 13122
    2. Wood framing and bracing 06100
    3. Sheathing 06100
    4. Insulation 07210

1.2 Quality Assurance

  1. Submittals: within sixty (60) days of owner's notice
    1. Submit three 6 inch x 6 inch pieces of Hardiplank / Hardipanel / Hardishingle claddings in texture and widths shown and specified herein.
    2. Submit three copies of specifications, installation data and other pertinent manufacturer's literature.

1.3 Product Handling

  1. Stack Hardiplank / Hardipanel / Hardishingle claddings on edge or lay flat on a smooth, level surface. Protect edges and corners from chipping. Store sheets under cover and keep dry prior to installing.

1.4 Job Conditions

****NOTE TO SPECIFIER**** SELECT ONE, DELETE ALL THAT DO NOT APPLY:
  1. Nominal 2 inch x 4 inch wood framing selected for minimal shrinkage and complying with local building codes, including the use of weather-resistive barriers and/or vapor barriers where required. Minimum 1½ inch face and straight, true, of uniform dimensions and properly aligned.
  2. Install weather-resistive barriers and claddings to dry surfaces.
  3. Repair any punctures or tears in the weather-resistive barrier prior to the installation of the siding.
  4. Protect siding from other trades.
****OR****
  1. Minimum 20 gauge 35/8 inch C-Stud 16 inch maximum on center or 16 gauge 35/8 inch C-Stud 24 inch maximum on center metal framing complying with local building codes, including the use of weather-resistive barriers and/or vapor barriers where required. Minimum 1½ inch face and straight, true, of uniform dimensions and properly aligned.
  2. Install weather-resistive barriers and claddings to dry surfaces.
  3. Repair any punctures or tears in the weather-resistive barrier prior to the installation of the siding.
  4. Protect siding from other trades.

1.5 Warranty

  1. James Hardie's limited product warranty against manufacturing defects in Hardiplank lap and Hardipanel vertical siding for 50 years, Hardishingle for 30 years and HardiTrim for 10 years.
    NOTE TO SPECIFIER: Insert appropriate number of years.
  2. Workmanship: application limited warranty for ____ years.

2. PRODUCTS

2.1 Hardiplank / Hardipanel / Hardishingle Cladding / Harditrim Fascia and Moulding

  1. Non-asbestos fiber-cement siding to comply with ASTM Standard Specification C1186 Grade II, Type A.
  2. Siding to meet the following building code compliance National Evaluation Report No. NER 405 (BOCA, ICBO, SBCCI); City of Los Angeles, Research Report No. 24862; Metro Dade County, Florida Acceptance No. 94-1234.04; US Department of Housing and Urban Development Materials Release 1263a; California DSA PS-019; and City of New York MEA 223-93-M.Non-asbestos fiber-cement siding to be non-combustible when tested in accordance with ASTM test method E136.
  3. Type: ______________________________
    NOTE TO SPECIFIER: SELECT TYPES, DELETE ALL THAT DO NOT APPLY: (Smooth 5¼" W / 4" EXP), (Smooth 6¼" W / 5" EXP), (Smooth 8¼" W / 7" EXP), (Smooth 9½" W / 8¼" EXP), (Smooth 12" W / 10¾" EXP), (Cedarmill5 ¼" W / 4" EXP), (Cedarmill 6¼" W / 5" EXP), (Cedarmill 8¼" W / 7" EXP), (Cedarmill 9½" W / 8¼" EXP), (Cedarmill 12" W / 10¾" EXP), (Cedarmill Select 5¼" W / 4" EXP), (Cedarmill Select 6¼" W / 5" EXP), (Cedarmill Select 8¼" W / 7" EXP), (Cedarmill Select 9½" W / 8¼" EXP), (Cedarmill Select 12" W / 10¾" EXP), (Smooth Beaded 8¼" W / 7" EXP), (Cedarmill Beaded 8¼" W / 7" EXP), (Colonial Smooth 8" W / 6¾" EXP), (Colonial Roughsawn 8" W / 6¾" EXP), (Hardishingle 6", 8" and 12" width with 8" Exposure), (Smooth Vertical siding panel 4' x 8'), (Smooth Vertical siding panel 4' x 9'), (Smooth Vertical siding panel 4' x 10'), (Stucco Vertical siding panel 4' x 8'), (Stucco Vertical siding panel 4' x 9'), (Stucco Vertical siding panel 4' x 10'), (Sierra 4" Vertical siding panel 4' x 8'), (Sierra 4" Vertical siding panel 4' x 9'), (Sierra 4" Vertical siding panel 4' x 10'), (Sierra 8" Vertical siding panel 4' x 8'), (Sierra 8" Vertical siding panel 4' x 9'), (Sierra 8" Vertical siding panel 4' x 10')
  4. Trim Type:______________________________
James Hardie Building Products, 1-800-9-HARDIE

2.2 Fasteners

NOTE TO SPECIFIER: REFER TO APPLICABLE BUILDING CODE COMPLIANCE REPORTS FOR MAXIMUM BASIC WIND SPEED FOR EXPOSURE CATEGORY AND/OR APPLICABLE SHEAR VALUES AND SELECT ONE FASTENER, DELETE ALL THAT DO NOT APPLY:

  1. Wood framing: 4d common corrosion resistant nails.
****OR****
  1. Wood framing: 6d common corrosion resistant nails.
****OR****
  1. Wood framing: 0.089" shank x 0.221" head x 2" corrosion resistant siding nails.
****OR****
  1. Wood framing: 0.093" shank x 0.222" head x 2" corrosion resistant siding nails.
****OR****
  1. Wood framing: 0.091" shank x 0.221" head x 1 ½" corrosion resistant siding nails.
****OR****
  1. Wood framing: 0.091" shank x 0.225" head x 1 ½" corrosion resistant siding nails.
****OR****
  1. Wood framing: 0.121" shank x 0.371" head x 1 ¼" corrosion resistant roofing nails.
****OR****
  1. Wood framing: 1 ¼" corrosion resistant roofing nails.
****OR****
  1. Wood framing: 1 ½" corrosion resistant roofing nails.
****OR****
  1. Metal framing: 1 ¼" No. 8-18 x 0.375" head self-drilling, corrosion resistant S-12 ribbed buglehead screws.
****OR****
  1. Metal framing: 15/8" No. 8-18 x 0.323" head self-drilling, corrosion resistant S-12 ribbed buglehead screws.
****OR****
  1. Metal framing: 1" No. 8-18 x 0.323" head self-drilling, corrosion resistant ribbed buglehead screws.
****OR****
  1. Metal framing: 1" No. 8-18 x 0.311" head self-drilling, corrosion resistant S-12 ribbed buglehead screws.
****OR****
  1. Concrete Walls: Erico Stud Nail, ET&F ASM No.-144-125, 0.14" shank x 0.30" head x 2" corrosion resistant nail.
NOTE TO SPECIFIER: When fastening through maximum 1 inch thick foam insulation, increase the length of the fastener by the thickness of insulation.

3. EXECUTION

3.1 Surface Conditions

  1. Correct conditions detrimental to timely and proper completion of work.

3.2 Installation - Harditrim Fascia and Moulding

  1. Install flashing around all wall openings.
  2. Fasten through trim into structural framing or code complying sheathing. Fasteners must penetrate minimum ¾ inch or full thickness of sheathing. Additional fasteners may be required to ensure adequate security.
  3. Place fasteners no closer than ¾ inch and no further than 2 inch from side edge of trim board and no closer than 1 inch from end. Fasten maximum 16 inch on center.
  4. Maintain clearance between trim and adjacent finished grade.
  5. Trim inside corner with single board.
  6. Install single board of outside corner board then align second corner board to outside edge of first corner board. Do not fasten Harditrim board to Harditrim board.
  7. Allow 1/8 inch gap between trim and siding.
  8. Seal gap with high quality, paint-able caulk.
  9. Shim frieze board as required to align with corner trim.
  10. Install Harditrim fascia over structural subfascia.
****OR****
  1. Overlay siding with Harditrim moulding at windows, doors and inside corners.
  2. Fasten through overlapping boards. Do not nail between lap joints.
  3. Overlay siding with single board of outside corner board then align second corner board to outside edge of first corner board. Do not fasten Harditrim boards to Harditrim boards.
  4. Shim frieze board as required to align with corner trim.
  5. Install Harditrim fascia over structural subfascia.

3.3 Installation - Hardiplank Siding

NOTE TO SPECIFIER: Local building code may permit the use of "water-repellent panel sheathing" instead of a "building paper type" weather-resistive barrier. However, the manufacturer recommends the use of a "building paper type" weather-resistive barrier in all siding applications. A vapor barrier may also be required.

NOTE TO SPECIFIER: Hardiplank siding may be installed either directly to the structural framing or up to 9½ inch siding may be face nailed on minimum 7/16 inch OSB or equivalent sheathing.

  1. Starting: Install a minimum ¼ inch thick lath starter strip at the bottom course of the wall. Apply planks horizontally with minimum 1¼ inch wide laps at the top. The bottom edge of the first plank overlaps the starter strip.
  2. Allow minimum 1 inch vertical clearance between roofing and bottom edge of siding.
  3. Align vertical joints of the planks over framing members.
  4. Maintain clearance between siding and adjacent finished grade.
  5. Locate splices at least one stud cavity away from window and door openings.
  6. Use off-stud metal joiner when vertical joints occur between framing members. Position metal joiner so that the bottom lip is resting on the solid course of planks. Fasten plank to the framing. Position and fasten abutting plank into place insuring that the lower edges of the two planks align. Locate metal joiner centrally behind the joint. Locate off-stud splices a minimum of two stud cavities from wall corners and stagger all subsequent course splices at minimum 24 inch intervals when located in the same wall cavity.
  7. Wind Resistance: Where a specified level of wind resistance is required Hardiplank lap siding is installed to framing members and secured with fasteners described in Table No. 2 in National Evaluation Service Report No. NER-405.
****OR****
  1. Face nail to sheathing.
  2. Locate splices at least 12 inches away from window and door openings.
  3. Wind Resistance: Where a specified level of wind resistance is required Hardiplank lap siding is installed to framing members and secured with fasteners described in Table No. 2 in National Evaluation Service Report No. NER-405.

3.4 Installation - Hardipanel Siding

NOTE TO SPECIFIER: Local building code may permit the use of "water-repellent panel sheathing" instead of a "building paper type" weather-resistive barrier. However, the manufacturer recommends the use of a "building paper type" weather-resistive barrier in all siding applications. A vapor barrier may also be required.

  1. Block framing between studs where Hardipanel siding horizontal joints occur.
  2. Place fasteners no closer than 3/8 inch from panel edges and 2 inch from panel corners.
  3. Allow minimum 1 inch vertical clearance between roofing and bottom edge of siding.
  4. Maintain clearance between siding and adjacent finished grade.
  5. Specific framing and fastener requirements refer to Tables 2 and 3 in National Evaluation Service Report No. NER-405.

3.5 Installation - Hardishingle Cladding

NOTE TO SPECIFIER: Local building code may permit the use of "water-repellent panel sheathing" instead of a "building paper type" weather-resistive barrier. However, the manufacturer recommends the use of a "building paper type" weather-resistive barrier in all siding applications. A vapor barrier may also be required.

  1. Substrate: Install Hardishingle cladding over minimum 7/16 inch thick OSB wall sheathing or equivalently braced walls complying with the applicable building code.
  2. Starting: Install a minimum ¼ inch thick lath starter strip at the bottom course of the wall.
  3. Maintain clearance between siding and adjacent finished grade.
  4. Apply starter course of 10 inch Hardishingle shingles or 9½ inch Hardiplank lap siding overlapping the starter strip.
  5. Apply subsequent courses horizontally with a minimum 10 inch overlap at the top and minimum 2 inch sidelap. The bottom edge of the first two courses overlaps the starter strip.
  6. Fasten between ½ to 1 inch in from of the shingle side edge and between 8½ to 9 inch from the shingle bottom edge.
  7. Maintain minimum 1 inch vertical clearance between roofing and bottom edge of shingle.
  8. Ensure vertical joints of overlapping shingle courses do not align.
  9. Wind Resistance: Where a specified level of wind resistance is required Hardishingle cladding is installed to substrate and secured with minimum two fasteners described in Table No. 6, 7, and 8 in National Evaluation Service Report No. NER-405.

3.6 Finishing

NOTE TO SPECIFIER: Certain geographic areas allow minimum single coat of 100% acrylic or latex exterior grade, high quality alkali-resistant paint on unprimed product. James Hardie recommends, minimum one coat primer plus one topcoat or two topcoats for best results. SELECT ONE, DELETE ALL THAT DO NOT APPLY

  1. Finish unprimed siding with minimum one coat high quality, alkali-resistant primer and one coat of either 100% acrylic or latex or oil based, exterior grade topcoat or two coats high quality, alkali-resistant, 100% acrylic or latex, exterior grade topcoat within 90 days of installation. Follow paint manufacturer's written product recommendation and written application instructions.
****OR****
  1. Finish Hardiplank/Hardipanel/Harditrim sidings coated by the PrimePlusTM system with minimum one coat high quality, either 100% acrylic or latex or oil based exterior grade paint within 180 days of installation. Follow paint manufacturer's written product recommendation and written application instructions.

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