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Lightweight roof tiles and method of production

  • US 5,795,380 A
  • Filed: 05/02/1997
  • Issued: 08/18/1998
  • Est. Priority Date: 05/02/1997
  • Status: Expired due to Fees
First Claim
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1. A lightweight roof tile constructed of a composition comprising cement present in the amount of approximately 154-214 parts by weight, gypsum present in the amount of approximately 147-203 parts by weight, perlite aggregate present in the amount of approximately 35-50 parts by weight, lava stone present in the amount of approximately 59-82 parts by weight, water present in the amount of approximately 92-138 parts by weight, a catalyst comprising styrene acrylic present in the amount approximately 49-68 parts by weight, and a powder selected from the group consisting of perlite powder and volcanic ash present in the amount of approximately 10-14 parts by weight.

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