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Glazing Restoration
Window and curtain wall systems are designed to respond to different performance
requirements when controlling the passage of air and water. The glazing components
used to seal and support the glass or metal panels, however, all have anticipated
performance life cycles and will eventually need repair and/or replacement.
Restoring integrity to these systems can be extremely challenging, particularly when
buildings are occupied and disruption must be minimized. In most cases, glazing
restoration must be done on-site requiring a thorough analysis of existing conditions
and a customized solution. In addition to allowing business within the building to go
on as usual, this eliminates the time-intensive, costly expense of disassembling and
replacing the window system.
Custom designed gasket and sealant solutions developed by Tremco’s Design Engineers
in conjunction with the building owner, consultant and glazing contractor, can provide
a “like new” appearance while greatly extending the life of the system and performance
by enhancing resistance to air and moisture infiltration.
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Century I and II, two identical Washington, DC office buildings, had
deterioriating structural Lock-Strip gaskets, which were supporting
insulating glass units in pre-cast openings. A custom rubber extrusion
was developed to span the failed gasket and was sealed to the glass face
and surrounding pre-cast opening. This eliminated the need for costly
repairs or removal of the perimeter sealant bead or deteriorated gaskets
and allowed the building to remain occupied while restoration was in
progress.
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Hills Plaza in San Francisco where silicone bridge joints were used as a
system to seal the façade rather than incurring the cost of dismantling
and redoing internal seals
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Low Memorial Library at Columbia University, a historical landmark, which
was a steel window system putty glazed and reglazed using silicone sealant,
foam tape and gaskets to mimic the original painted putty appearance
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