When it comes time to install a new roof on your home, consider asking the roofers about metal. A metal roof is designed to last for 50 years or longer with proper maintenance. It might be the only roof you ever need to put on your house. With proper radiant barriers and insulation, it will also make your home more energy-efficient. Consider one of these five types of metal for your new roof.
Copper has been used in metal roofs for hundreds of years. Roofers often recommend it for its longevity and beauty. After a few years of exposure to the elements, the copper develops an attractive patina. In an ideal environment and with proper maintenance, a copper roof could last for up to 200 years. It is a softer metal, which means that hailstones hitting it would make dents rather than punctures. The softness makes it quiet during rainstorms.
Aluminum roofing materials are recommended by roofer for homes located near coastal areas. This is because the aluminum has a high resistance to corrosion caused by salt.
Aluminum is highly reactive with oxygen. It quickly forms a layer of aluminum oxide on the outermost part of the roof. The aluminum oxide creates a protective layer that seals the rest of the roof from moisture and other types of damage. Aluminum roofs can be painted after the material is oxidized.
Zinc roofs can last for up to 100 years. The low melting point of zinc means that it is an environmentally-friendly material, requiring only 1/4 the energy to produce roofing panels compared to copper or steel.
The softness of zinc puts it at a slightly higher risk of damage from severe weather, but this can be adjusted by having the roofers use proper fasteners, sloping the roof correctly for the location and using smaller panels or shingles.
4. Galvanized or Galvalume Steel
Galvanized steel is the most common type of metal roofing. It is steel covered with a layer of zinc for protection. It is the lowest price type of metal roofing. Galvalume steel has a coating of zinc mixed with aluminum. The aluminum adds resistance to corrosion, but it increases the risk of cosmetic scratches on the surface of the shingles or panels.
5. Weathering Steel
Weathering steel has an outer layer that is intentionally designed to rust. It is typically used for accent roofs that do not require structural protection. Weathering steel can have ceramic glazes painted onto it for enhanced protection if it is going to be used as part of a structural roof. The glaze offers resistance to rust, corrosion and UV radiation.