With more than four decades of proven success in quality roofing services, Shelder Roofing and Retro Fit group is a family-owned & operated business serving the greater San Fransisco area state. Our expert team has been dedicated to providing the best service and quality available in the area With more than four decades of proven success in quality roofing services, Shelder Roofing and Retro Fit group is a family owned and operated business serving the greater San Fransisco.Shelder Roofing and Retro Fit group is a family owned and operated business serving the greater San Fransisco. With more than four decades of proven success in quality roofing services, Shelder Roofing and Retro-Fit group is a family-owned & operated business serving the greater.