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The green coloration that develops on copper roofs is called a “patina,” and it’s a result of mild oxidation on the surface. The oxidation process is not harmful to your roof. In fact, the surface corrosion acts as a protective layer and won’t spread to the core of your copper roof materials. The discoloration will progress much more quickly in damp or humid climates than it will in dry climates. If you don’t like the green color, you can seal your roof to preserve the shiny, rose-gold look.

Like any housing material, metal roofs have a unique list of pros and cons. On the cons side, metal roofs can suffer from expansion and contraction, which requires more attention to proper installation than for other roofing types. Also, the higher cost of metal roof installations is a barrier to some homeowners on a budget.

Most standing seam metal roofs last between 50 and 80 years. Certain high-end metals like copper or zinc can last up to 100 years if well-maintained. For the best durability, choose a low-gauge (thick) roof in a metal that works with your climate. Some are susceptible to thermal expansion and aren’t the best choice for all climates.

Yes, you can salvage grill grates with some surface rust. Simply apply a commercial rust remover or a homemade vinegar, baking soda, or lemon juice paste with a wire brush or steel wool. After removing the rust from the metal, you can then apply a thin layer of rust-preventing oil to keep the grates looking good as new for longer. However, grate replacement is often better when the rust is deep.