Certainteed Corporation

William C Woellner

Michael J Noone

A lightweight, preferably clay roofing tile, preferably having surface configurations to simulate the thick heavyweight of natural slate, or to simulate natural wood shakes, or other natural materials, is provided, constructed so as to be molded from materials with weight-reducing zones, and strengthening webs, integral with the tile, such that each tile is of unitary, molded, one-piece construction. The placement, type and number of webs enable the cutting of the tiles to form tile accessory pieces, at ends of laid-up courses, hips, ridges and the like, to minimize or eliminate the necessity of inventorying large numbers of special accessory pieces. The webs provide strengthening while the hollow zones reduce weight, with at least some of the webs being located to provide strength to the tiles along newly cut edges. An interlock design at tile edges facilitates reduction in weight by eliminating the need for a double coverage overlap. A series of bosses with depressions facilitate nailing when the tile is cut at an angle to form hip pieces.

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Athens, OH, United States of America

William C Woellner