The following pictures represent a brief overview of the problem areas. The copper cladding on the main roof and the low roof is in an advanced state of disrepair, allowing the seepage of water and the corrosion of the metal deck that supports the roof.
Small tremors can open cracks in the masonry, which are then vulnerable to water in cold weather.
This water freezes, opening the cracks wider and making the problem worse as time goes on. The damage is so bad that there are gaps between the railing and some of the pillars. Airborne pollutants that mix with rainwater react chemically with the mortar between the stones. As we can see, this can eat away at the stone, leaving a crusty deposit, known as efflorescence, on the surface. In some cases, repairs done in the past used inappropriate materials.