It typically represents less than half of one percent of the cost of a project. However, flashing is one of the most critical building components for the long-term health of a structure.
In recent years, an array of new flashing products have emerged. Some arise out of value engineering; some attempt to take advantage of modern technologies for easier installation; and yet others appeal to aesthetics.
In the late 1700’s, Thomas Jefferson designed and installed tin underlayment for the roof of Monticello (his home) as well as the Rotunda building at Center College (now University of Virginia). As President, he insisted on a similar design for the Capitol Building. This product is widely recognized as the first form of flashing.
See the Monticello Website for more information.