cover flashing

counterflashing, cover flashing, cap flashing

counterflashing
A strip of sheet metal, often built into masonry and turned down over other flashing; used to prevent water from entering the joints and the exposed upturned edges of base flashing on a roof.
McGraw-Hill Dictionary of Architecture and Construction. Copyright © 2003 by McGraw-Hill Companies, Inc.
References in periodicals archive ?
The roof and upstand were renewed and a cover flashing fitted over the joint.
Simply fold the lead back down so the cover flashing is in place.; 9 Again re-seal with lead sealant.; JOB DONE Top tip Use gloves when working with old lead and wash hands after handling.
* Vary the effect by using sheets of copper, or cover flashing with metallic paints.
The part that you can see is called the cover flashing because beneath it are L-shaped lead plates, called soakers, set under each slate separately but overlapping each other down the slope.