Our investigation included visual surveys, condition assessments of the original waterproofing below the walkway topping slab, and water testing to diagnose leakage. We developed repair options for the university’s consideration and designed walkway repairs. Highlights of our design include the following:

• Installing a new modified bitumen waterproofing membrane and exposed aggregate concrete topping slab
• Providing copper sheet metal counterflashing where walkways intersect the original sandstone walls to meet aesthetic and technical requirements
• Installing new copper liners in the built-in gutters, which are visible from the walkway and courtyard
• Detailing the gutter liners with expansion joints, an accelerated patina finish, and a secondary membrane gutter liner to maintain the gutter’s appearance
• Replacing balcony walkway railings with ones meeting current codes
• Repairing corroded steel deck and framing and applying a new rust-inhibiting paint and fireproofing coating
• Adding a textured acrylic finish system at the soffit that matches the existing cement plaster walls

We facilitated mockup reviews for Stanford architectural officials and also provided construction administration services.