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In many areas, chimney repair companies need to be licensed, but it depends on your state and local municipality. You can check with your local building department to see if companies need licenses, and then you can use Angi’s license lookup tool to confirm that the company you’re considering holds the proper license. It’s a good idea to confirm that the professional is fully insured, and you can ask about certification from organizations like the Chimney Safety Institute of America (CSIA). These certifications aren’t mandatory, but they help ensure a professional repair.

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.

In the right conditions, a steel roof can easily last 50 years or more. However, your environment and maintenance play a large role in the lifespan of a steel roof. For example, if you live under a large tree that frequently drops limbs, your roof will last much less time. Metal roofs near the sea degrade faster as well due to salt in the air.

Metal roofs don’t inherently leak more than shingles, and when properly installed, they can actually offer greater protection against leaks. However, poor installation, improperly sealed fasteners, or thermal expansion issues can lead to leaks over time, so professional installation and regular maintenance are crucial.