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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.

Roof repair costs about $1,100 on average. The cost to repair a roof depends on the size, type of roof, and severity of the issue. Additional cost factors include the type of repairs needed, the pitch and complexity of the roof design, any permits required, and the labor cost in your location. The time of year can influence the overall price, too, as winter repairs can be more expensive due to the slippery conditions for working on a roof. 

Generally, to install roof flashing, you shouldn't use screws. Rather, it's best to use either roofing cement or nails. For the best results, match your nail type with the flashing materials. If you have aluminum flashing, use aluminum nails, and so on. You can use the same nails for your asphalt shingles and flashing.

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.