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There are advantages and disadvantages to metal roofs in cold climates. Metal roofing stands up extremely well to harsh winters as long as it is properly insulated. Snow and ice slide right off residential metal roofs, preventing the formation of ice dams; but because of this, they may require snow guards, which prevent the ice and snow that slide off a roof from causing a sort of "mini avalanche" that can damage property and people below.

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.

When properly installed and maintained, a metal roof can last 50 to 80 years. However, the fasteners used to attach the roof may have a shorter lifespan than the roof panels, so it’s a good idea to inspect your roof every few years to check for wear and replace any damaged components. Metal roofs installed over shingles don’t last as long as tear-offs since the underlying roofing components can deteriorate over time, and the added weight can stress roof supports.

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.