Like many other building composings...

Like many other building composings curtain walls do not last forever. "These installations have a finite service life," says Thomas Schwartz, president of the Waltham, Mass., engineering firm of Simpson, Gumpertz & Heger (SGH) which has a major curtain wall consulting practice.
Schwartz says many building holders are shocked to learn that a major composing of the exterior wall, insulated and laminated glass units, may require replacement well before the remainder of the curtain wall. He finds that the durability of major exterior wall constituents is often ...