bald roof

smooth-surfaced roofing

A built-up roofing membrane which is surfaced with (a) hot asphalt applied with a mop; or (b) cold asphalt emulsion or a cutback roof coating; or (c) an inorganic top felt. It does not have a mineral surface aggregate.
McGraw-Hill Dictionary of Architecture and Construction. Copyright © 2003 by McGraw-Hill Companies, Inc.