The balustrades on this building sitting atop Nob Hill in San Francisco were made
of cast in
place concrete. The columns had a long history of spalling from metal ties
inserted in the
concrete. Our recommendation to the owners was to replace the existing
balustrades with
natural limestone. We contracted with Old World Stone (www.oldworldstone.com) in
Canada to fabricate new balustrade assemblies from
Indiana Limestone.
We are currently replacing all coping and balustrades with the stone. The owners are
thrilled
with the elegant new look and comforted in the knowledge that they will never
have spalling
problems again.
