Imperial Roofing Group’s ‘No-Leak Guarantee’ covers your roof for 1 to 10 years, depending on the type of roof, and the materials used. As proof of the integrity of our products and craftsmanship, we can point to one of the lowest warranty costs in the industry. Quality assurance at Imperial Roofing Group starts with quality people. Each member of our quality assurance team must have at least 10 years actual roofing installation experience, and 5 years supervisory experience. Our inspectors conduct in-progress inspections at every critical point in the installation process, as well as an exhaustive final inspection.