Longevity

Can last about 3 to 7 times longer a typical asphalt roof which is usually replace every 12 to 17 years.
This means that in the long run you will actually save money because you would not need to replace or repair a metal roof again.

Weather Protection

Best protection against ice, snow and ice dams.
FEMA recommend metal roofs in areas that are prone to natural disasters such as hurricanes, floods, earthquakes, etc.
A metal roof will not increase the likelihood of your home getting struck by a lightning.
If a lightning does strike your home, a metal roof will safely dissipate the electric charge even if it is not grounded.
Metal Roofs act as a Faraday Cage for your house and they disperse the charge over a larger area as compared to a skimpy little wire coming down your chimney or wall. They also intercept 100% of the lightning that comes towards your house, unlike a lightning rod which only intercepts the lightning that happens to hit your rod.
If you are concerned about “noise” when it rains, rest assured knowing that a metal roof installed over solid sheathing (whether wood planks / boards or plywood) will be as quiet as an asphalt shingle roof. The difference in sound level (measured in decibels) produced by rain drops hitting the roof surface of an asphalt shingle roof compared to metal will be largely undetectable to human ear.

Metal roof will not rot, crack, dry out, chip, warp, leak unlike other common roofing materials.
Metal can withstand impact from falling object such as hail, sticks, etc. without damaging the roof.
Metal is non-combustible and so a metal roof will never catch on fire like cedar and asphalt roofs.
Modern metal roofs such as aluminum standing seam have a class “A” or UL Class 4 fire retardant ratings. If you happen to live in a fire-prone area, a metal roof can help protect your home from a forest fire, as well as help you save money on your home insurance premiums.

Out of all the roofing materials available for residential uses, metal provides the greatest return on your investment (ROI). The national average on cost recouped at resale is 86%. The average recouped cost on the East Coast is as high as 95.%
A metal roof can be a remarkably significant selling point in the eyes of potential home buyers. Not having to re-roof again, is as good as it gets for most homeowners. The curb appeal and beauty of a metal roof can also be a great asset when it comes to attracting prospective home buyers to your property.
Homes outfitted with metal roofs will typically have a 6% resale value gain over homes with asphalt shingle roofs.