If you live in a coastal area, the humidity and salty air would rapidly cause corrosion of aluminum or galvanized steel flashing. Copper flashing however is not affected by the humidity or salt water.
UV Light Resistance
If your chimney is being repaired or replaced, copper has many benefits. One of them being its resistance to UV light. This means that the copper flashing Chicago produced, isn’t damaged by direct sunlight.
Copper flashing Chicago isn’t affected by the temperature and can be installed in any weather. It is compatible with many glues, sealants and caulking materials, so it can be used with many other materials.