base ply

base ply

In roofing: the layer of felt secured to the deck over which a built-up roof is applied.
McGraw-Hill Dictionary of Architecture and Construction. Copyright © 2003 by McGraw-Hill Companies, Inc.
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Multi-ply labeling is suitable for most curved or flat packaging shapes, with a variety of decorative materials and functional base ply adhesives combined to fit most applications.
pinpoints the consequences of improper sequencing of work as contamination and poor adhesion between the cap sheet and base ply: ultimately, blisters, delamination, leaks, and voids.
Inland replaced the 285" triple layer base ply wire on its No.
A built-up roof (BUR) is a system of components which includes a base ply, a vapor retarder, insulation, a membrane, and surfacing material.