A wooden strip placed under the last bottom course of roofing tile to raise it to conform to the same slope as the rest of the courses on the roof.
Illustrated Dictionary of Architecture Copyright © 2012, 2002, 1998 by The McGraw-Hill Companies, Inc. All rights reserved
A strip of wood beneath the lowest course of shingles on a roof (i.e., at the eaves) that raises the lower edges of the shingles so they are nailed at the same slope as the shingles above them.
McGraw-Hill Dictionary of Architecture and Construction. Copyright © 2003 by McGraw-Hill Companies, Inc.