Roof assemblies as manufactured by Kemper Systems, Siplast, GAF, Firestone and Johns Manville are just a sample of the companies we have professional relationships with. The licenses require extensive training by Gemini personnel and field approval of all applications. At Gemini, we spare no expense when it comes to provide our personnel with education in the latest technologies. Therefore, Gemini is ready to provide a first class installation of any roof system to satisfy your needs. Gemini Waterproofing and Restoration is a family owned business specializing in the restoration and maintenance of New York's treasured skyline as well as other valued structures in the tri-state area during the last three decades.