Free Technical Information for Building Inspectors, Contractors and Consumers. Code and Manufacturer's Information Resource
HardiPlank
What's the Code Say?
Fiber Cement Siding:
* Panel Siding: Panels shall be installed with the long dimension parallel to framing. Vertical joints shall occur over framing members and shall be sealed with caulking or covered with battens. Horizontal joints shall be flashed with Z-flashing and blocked with solid wood framing.
* Horizontal lap siding: Lap siding shall be lapped a minimum of 1-1/4-inches and shall have the ends sealed with caulking, covered with an H-section joint cover, or located over a strip of flashing. Lap siding courses may be installed with the fastener heads exposed or concealed, according to approved manufacturer's installation instructions.
Key Points:
LAP SIDING:
* First course over a 1/4-inch lath strip
*1/8-inch gap between plank and trim, then caulk
*Maximum 1.8-inch gap at joints
* Fasteneres shall be 3/8-inch from plank edge
*Weather resistive barrier required
*Maintain code required grade clearance ( 4-6-inches)
* 1 to 2 -inch clearance from roof
*Minimum1-1/4 inch overlap required
*For face nail application of 9-1/2" wide or less siding to OSB, fasteners are spaced a max. of 12"
*Fasteners must be corrosive resistant, galvanized or stainless steel. Use quality hot-dipped galvenized nails for best result.
*Caulk joints
* HardiPlank must be painted
* Minimum 7/16-inch OSB
* Product contains Silica- Use precautions
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Some History;
In the mid 1980s, James Hardie pioneered the development of fiber-cement technology, and began designing and manufacturing a wide range of fiber-cement building products that made use of the benefits that came from the product´s durability, versatility and strength.
Using the technical and manufacturing expertise it developed in Australia, James Hardie Inc. expanded its operations to become a world-leading, specialized, high-technology manufacturer of a wide range of fiber-cement building materials.
Today, James Hardie Inc. is purely a fiber-cement business. It operates in markets around the world, with manufacturing operations in the United States, Australia, New Zealand and the Philippines. The businesses employ over 2,500 people who generate revenue of more than $1.5 billion a year.
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For detailed information go to the Hardi Plank Lap Siding Installation Manual at :
http://www.jameshardie.com/pdf/install/install_plank_north.pdf
