premium-grade lumber

premium-grade lumber

The highest grade of lumber available both in material and workmanship; intended for the finest work; compare with custom-grade lumber and economy-grade lumber.
McGraw-Hill Dictionary of Architecture and Construction. Copyright © 2003 by McGraw-Hill Companies, Inc.
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The company also designed its own flow molding equipment to produce a premium-grade lumber using 100% post-consumer HDPE bottles.