Yale University, Sterling Memorial Library

SGH investigated water leakage, evaluated interior humidity/temperature conditions for archival storage, and assessed moisture/vapor drive through the building enclosure. We developed a remedial design that included:

• Repairing stone facing and installing concealed wall and window flashings
• Restoring the original leaded glass windows in the Main Reading Room and prominent base buildings that became bowed and distorted due to age and frequent use
• Rehabilitating stained glass windows and the limestone window traceries, restoring natural brightness to the spectacular space
• Replacing existing windows in the stack tower with custom-made, high-performance windows, permitting better climate control
• Replacing deteriorated slate and copper roofs

Years later, Yale retained SGH to develop a restoration program for the large skylight and help them mitigate ongoing leakage and breakage resulting from an inadequately performing shock-absorbing protection screen over the skylight. We designed waterproofing details and a new shock-absorbing support system to prevent damage to the new glazing. Our design provided Yale with a safe and watertight skylight that maintains the aesthetics and lighting as viewed from the interior.

SGH is currently preparing the enclosure portions of a new master plan for the library.