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While there are many benefits to installing a metal roof on your home, there are some downsides, too. Zinc roofs, in particular, are susceptible to corrosion from overly salty air directly near coastal areas. Another potential downside of zinc roofing is that it must be allowed to expand and contract with the weather. This means special attention is necessary to how it's fastened to the home to avoid issues. 

The costs of sheet metal repair vary, generally between $200 and $600, depending on the extent of damage, material type, and complexity of the repair.

A metal roof will last for an average of around 50 years—usually between 40 and 75 years—which is about double the lifespan of an asphalt roof—between 15 and 30 years or 25 years on average. Installing a metal roof is usually more expensive than an asphalt roof, with an average cost of $11,400 compared to the $9,200 for an asphalt roof. However, given that a metal roof costs about 20% more and lasts twice as long, it’s typically well worth the investment and should save you money in the long run.

24-gauge metal is thicker and will stand up better to impact, so it’s a better option for roofs that will see heavy snow and ice accumulation, hail storms, fallen tree debris, and blown debris. It’s a more expensive option, but it’s worth the added cost for roof longevity in extreme climates. If you live in a more moderate climate and don’t have trees overhanging your roof, 26-gauge metal is suitable and is a more affordable option.