--- title: Can holes be drilled in the 50 ft. Galvanized Steel Roll Valley Flashing? description: Yes, you can drill through galvanized steel flashing. --- [Skip to content](https://help.gibraltarbuildingproducts.com/migration/en/knowledge/can-holes-be-drilled-in-the-50-ft.-galvanized-steel-roll-valley-flashing#main-content) English Show submenu for translations ![GBAD Full Color.png\]](https://help.gibraltarbuildingproducts.com/hs-fs/hubfs/GBAD%20Full%20Color.png?height=40&name=GBAD%20Full%20Color.png) - [Default HubSpot Blog](https://semetals-1971711.hs-sites.com/blog) Open main navigation Close main navigation - [Default HubSpot Blog](https://semetals-1971711.hs-sites.com/blog) - English Show submenu for translations - Go to www.gibraltarbuildingproducts.com Go to www.gibraltarbuildingproducts.com Hello. How can we help you? - There are no suggestions because the search field is empty. 1. [Help Center](https://help.gibraltarbuildingproducts.com/migration/en/knowledge?hsLang=en) 2. 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Galvanized Steel Roll Valley Flashing? ## Yes, you can drill through galvanized steel flashing. Yes, you can drill through galvanized steel flashing. Mark the hole with a center punch, the indentation left by the center punch will prevent the drill bit from wandering. Make sure the sheet metal is clamped or secured to an expendable backer board. Drill holes in sheet metal with a twist drill. Always use safety glasses and gloves. - [Default HubSpot Blog](https://semetals-1971711.hs-sites.com/blog) [![Gibraltar Building Accessories Logo](https://help.gibraltarbuildingproducts.com/hs-fs/hubfs/GBAD.jpg?width=2500&height=777&name=GBAD.jpg "Gibraltar Building Accessories Logo")](https://www.gibraltarbuildingproducts.com/) www.gibraltarbuildingproducts.com Help Center Copyright © 2026, Gibraltar Building Accessories Division