Wiss, Janney, Elstner Associates (WJE) is an interdisciplinary firm of engineers, architects, and materials scientists committed to helping solve, repair, and avoid problems in the built world. Since 1956, our experience from more than 125,000 projects and our state-of-the-art laboratory and testing facilities have made WJE a leader in providing innovative yet practical solutions to the clients we serve.

WJE’s roofing and waterproofing services include repair and replacement design, condition surveys and failure analysis, field and laboratory testing, nondestructive testing, and field observations during construction. Our work requires an intimate knowledge of a wide range of roofing systems—from historic clay tile to the latest in green roofs and sustainable design, to plaza decks, and below-grade waterproofing systems.

Building owners and contractors know the importance of a water-tight structure, which is why they call on WJE’s roofing and waterproofing professionals.