Process for roofing with an 18 inch shingle

• US 5,501,056 A
• Filed: 11/02/1994
• Issued: 03/26/1996
• Est. Priority Date: 04/27/1990
• Status: Expired due to Term

• Current Assignee: CertainTeed Corp. (Compagnie De Saint-Gobain)
• Original Assignee: CertainTeed Corp. (Compagnie De Saint-Gobain)
• Inventors: Quaranta, Joseph, Stahl, Kermit E., Noone, Michael J., Mehrer, George W., Hannah, Marcia G.
• Primary Examiner(s): Friedman, Carl D.
• Assistant Examiner(s): KENT, CHRISTOPHER T
• Application Number:
  US08/333,278
• Time in Patent Office: 510 Days
• Field of Search: 52/748, 52/747, 52/518, 52/557, 52/555, 52/553, 52/554
• US Class Current: 52/748.1
• CPC Class Codes: E04D 1/20 of plastics; of asphalt; of fibrous materials
• CPC Class Codes: E04D 1/26 Strip-shaped roofing elements simulating a repetitive pattern, e.g. appearing as a row of shingles
• CPC Class Codes: Y10S 83/92 Shingle making
• CPC Class Codes: Y10T 83/04 Processes

Abstract

A roofing shingle is provided for shingling a roof with overlapped shingles, wherein the exposed portion of the shingle is selected to be of a height in the installed condition relative to the overall height of the shingle that enhances material utilization, to be at least approximately 44.4% efficient. This is accomplished by using an exposure height of 8 inches relative to an overall shingle height of 18 inches. The shingles are preferably constructed to have either 3 or 4 tabs, thereby having a ratio of exposure height to tab width of either 0.667 or 0.889, respectively. A larger exposure allows one to obtain 200 shingles for each 300 lineal feet of sheet shingle material, when the shingles have 18 inch overall height, and further allows an overall saving in the number of nails required to install a roof. The invention also contemplates variations in tab width within a given shingle and variations in number of tabs from about one to nine tabs in a given shingle.

Claims

1. A process for roofing with shingles comprising applying successive courses of shingles over next previous courses of shingles by using shingles having overall heights of 18 inches, covering the upper 10 inches of the next previously laid course of shingles, and leaving exposed the lower 8 inches of the next previously laid course of shingles, whereby the material utilization efficiency is at least approximately 44.4 percent when the efficiency is defined as the ratio of shingle exposure height to overall shingle height.