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Composite building material

  • US 6,941,720 B2
  • Filed: 10/09/2001
  • Issued: 09/13/2005
  • Est. Priority Date: 10/10/2000
  • Status: Expired due to Term
First Claim
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1. A building material, comprising:

  • a first component, wherein the first component comprises a pre-formed fiber cement layer having a density of between about 53 to 115 lb/ft3 and a fiber content between about 5-12 wt. %;

    a second component positioned adjacent the first component, wherein at least a portion of the components forms interpenetrating mechanical and chemical bonding with the other components; and

    wherein the fibers of the first component extend in a substantially planar orientation substantially parallel to a surface of the pre-formed fiber cement layer.

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