Exposure of this masonry terra cotta to repeated freeze thaw cycles resulted in deterioration beyond repair by normal restoration methods. Waterproof cladding in sheet lead was proposed because the extreme malleability of this material permits forming o  

Here the lead is used to protect the top of all the chimneys. Lead is commonly used to cover and protect exposed masonry, ledges, buttresses, and copings to eliminate erosion of the stone from the natural elements.  

Ledges being prepared for lead. The project included a complete dismantle and re-construction of all masonry elements incorporating sheet lead to protect all of the ledges exposed to weathering.