Roeslers Roofing and Remodeling - Flat Roofing Contractor Schertz TX. QRG Roofing and Remodeling is a locally owned & operated flat roofing contractor near Schertz TX. With years of experience, our flat roofing contractors provide services of the finest quality! That is why they strive to not only achieve your goals but also exceed your expectations. Our experienced and professional roofing services make us one of the best in the industry. Customer satisfaction begins at the top of your house.