Metal roofing is the best idea on a home with a sloped roof. Metal will last longer than you will. Asphalt gets replaced in 25 years in most cases. Asphalt is made of petroleum, which is bad for the environment and the future economy and is nearly an obsolete technology. You could take a peak at â€œsolar roofingâ€ in which the roof looks like a metal roof, but actually provides electricity too. As you can see, there are a number of patterns and looks for metal roofing. If you like shingles, or the ceramic tile look, or you are okay with straight seems, its all available in metal. Check out this website.