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Dave DeRogatis

Dave DeRogatis is director of composites for Ply Gem Industries Inc., Cary, N.C. DeRogatis is responsible for overseeing the research and development of composite roofing products.

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The installation checklist

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Slate has been a defining feature of historical architecture since it was first quarried in the U.S. during the 19th century. Used as a roofing material, slate is beautiful and reliable but must be installed properly. Roofing contractors should be aware of the five most common mistakes made while installing slate roof systems to help ensure their own installations are performed correctly.

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