Since 1988, the Highmark building’s unique pyramidal peak has been a constant presence reigning over downtown Pittsburgh. What else has been a constant in the area for the past 27 years? The sun, wind, rain and snow. While the building’s Spanish pink granite exterior panels may be ageless, the caulk between them is not. Removing the old caulk and adding the new is the easy part. Giving the workers something to stand on up there, however,

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