Mueller steel building panels give you the best of both worlds: lasting color and extra strength. All of the coated panels used on Mueller's #1 steel grade buildings come with a 30-year limited paint warranty. This guarantees that the painted panels will stay fresh and vibrant for years to come. We offer many colors to fit your home and landscape. Each panel is made of 26-gauge, commercial-grade steel, and is resistant to fire and hail. Custom lengths are available, too.