Every construction project has its challenges—but with York through-wall flashings, moisture won’t be one of them. At York, we offer a full range of flashing choices for comprehensive protection from moisture and vapor in all through-wall applications. We invented the world's first copper fabric flashing in 1935, and we continue to revolutionize the industry with high performance copper flashing solutions that are flexible, clean and easy to work with. Product innovation that solves problems...keeps you up to code...and keeps you on budget.