A metal roof can last anywhere from 15 to over 100 years, with an average of 50 years, depending on the material, installation, and environment. The specific metal is a key factor: aluminum roofs may last 20 to 45 years, while steel can last 30 to 60 years. Tin can last for up to 75 years, and more durable options like zinc, stainless steel, and copper can last from 80 to over 100 years. Factors that can shorten a metal roof's lifespan include living in a coastal region with corrosive salt air, improper installation (such as laying over old shingles), and failing to inspect and replace fasteners, which may wear out before the panels.

The warranty for algae-resistant shingles varies by manufacturer, but the industry standard is 25 years for overall shingle durability and lifespan and between 10 and 15 years for algae resistance. Some products come with longer warranties for discoloration of up to 30 years. Check warranty coverage for the shingle and algae protection before deciding on a roofing product.

Using an ice and water shield underlayment under a metal roof is a good way to protect the roof and your home from damage in colder climates that see a lot of winter weather. Traditional underlayment isn’t effective underneath a metal roof, though, so be sure to install one specifically made for metal roofs to get the best protection.

Yes, a new roof will add value to your home, often providing a return on investment (ROI) of between 60% and 70%. Not only will a new roof boost curb appeal, but savvy homebuyers will also know that a new roof means they won’t have to worry about roof leaks and related damage for years after closing. They’ll also know that they’ll save money by potentially having decades before they need to worry about paying for repairs or replacement.