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When you’re responsible for housing the data center operations for the Southeast’s largest concentration of telecommunications companies, the words “leaky roof” are likely to cause you more than just a little anxiety. So when a renovation contractor requested that Terracon provide a roofing evaluation and specification to reroof the 10-story, 103-year-old 56 Marietta Street building in downtown Atlanta, it was clear that this project would require special attention. The historic brick hotel built in 1912 is now home to a 160,000-square-foot data center. The U-shaped building has four different levels of roofing which cover approximately 13,000 square feet. The third floor was Terracon’s particular focus and proved to be an unique opportunity for roof consultation.
The project’s challenges began to mount early in the discovery phase. Terracon began by conducting destructive testing which identified that the building actually had two roofing systems – one of which was coal-tar pitch that dated back to the original construction. Coring roof samples then revealed that water had been running under the most recent roof system – a 15-year-old modified bitumen system. A subsequent moisture scan showed the third floor roof to be 100 percent wet. Full Story.