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The placing of a waterproof material under an existing pavement, or the like, to prevent the flow of water through the pavement and to fill the voids under the pavement.
McGraw-Hill Dictionary of Architecture and Construction. Copyright © 2003 by McGraw-Hill Companies, Inc.
References in periodicals archive ?
Roy Mathis, URETEK engineer, explains, "We call the void filling stage, 'undersealing.' This important stage allows us to trust the adjacent existing panels to handle-the new load received from the stitches connecting the precast panels."