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To maintain metal roof health, schedule regular inspections, clear debris from gutters, and check for signs of corrosion.

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. 

In the metal versus shingle roof debate, aluminum roofing has several advantages. However, aluminum roofing costs more than typical asphalt roofing, so up-front cost is a major downside. Aluminum is also somewhat susceptible to denting, and repairs can be more costly than for other roof types because your roofer will need to replace large panels rather than individual shingles. Aluminum roofs are also noisy in the rain, which some homeowners don’t like.

Whether you should repair or replace your roof boils down to the scope of the damage. If you need to replace more than 20% or 30% of your roof, then it’s probably a good idea to just replace the entire roof, as leaving older sections up can leave parts of your roof open to more issues. By replacing your roof, you can have peace of mind that no pesky leaks are sneaking into your home.