Insulated roof board

  • US 5,069,950 A
  • Filed: 04/11/1990
  • Issued: 12/03/1991
  • Est. Priority Date: 04/11/1990
  • Status: Expired due to Term
First Claim
Patent Images

1. A composite insulated roof board structure comprising:

  • (a) an insulated roof board member comprising (1) a main portion of rigid coherent solid insulating material, and (2) a top portion comprising a plurality of spaced blocks above said main portion and integral therewith, said blocks defining therebetween a network of interconnected channels at the same level for horizontal venting of water vapor; and

    (b) a relatively hard, dense protective top layer which is adhered to the tops of the blocks of said insulated roof board member.

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