2. Customers rave about C. Johnston Roofing & Waterproofing for their professionalism, top-quality work, and quick response time. One reviewer mentioned that after a torrential rain, they had water leakage on multiple floors and the basement, but the company was able to waterproof the roof in just two hours, with no leakage in the next rain. Another reviewer praised the company for their punctuality, responsibility, and expert approach to brownstone exterior and roofing work. Overall, customers appreciate the efficient and effective service provided by C. Johnston Roofing & Waterproofing. 6. Unique facts about C. Johnston Roofing & Waterproofing include their commitment to building a personal relationship with each customer, their goal of offering the most satisfying customer service in Manhattan, and their dedication to providing top-quality roofing services to meet the needs of their clients. 8. C. Johnston Roofing & Waterproofing specializes in offering top-quality roofing services to customers in Manhattan. With a focus on building personal relationships and providing the most satisfying customer service experience, they aim to not only meet but exceed their clients' expectations. Their commitment to professionalism, punctuality, and expert workmanship has earned them high praise from customers who appreciate their efficient and effective service.