The two kinds, and why it matters
There are two broad types of metal roof. Standing seam has raised interlocking seams and hides its fasteners underneath, which is the version you want on the coast because there are no exposed screws to work loose or rust in the salt air. Exposed-fastener metal, the kind with visible screws in rows, is cheaper and common on barns and outbuildings, but those screws and their rubber washers are the weak point and need attention over the years. For a house near the water, standing seam is usually worth the difference.
Why metal suits this coast
The three things that punish roofs here, salt, sun, and wind, are the three things metal handles best. A properly installed standing seam roof sheds hurricane-force wind, does not lose granules to UV the way asphalt does, and does not corrode the way you might expect when the coating is right. It also reflects heat, which shows up on summer cooling bills. The catch is that it lives or dies on the install, because a metal roof leaks at the seams and the flashings if the crew cuts corners, not in the middle.
Metal versus shingle, honestly
A good architectural shingle roof is cheaper up front, looks traditional, and does the job for a normal stretch of years, and there is nothing wrong with choosing it. Metal costs noticeably more to install and asks for a crew that knows metal specifically, but it commonly lasts two to three times as long, which can make it cheaper per year even though the first check is bigger. If you plan to keep the house a long time or you are tired of replacing roofs after storms, metal starts to make sense. If you are selling in a few years, shingle is often the practical call.
- Standing seam hides its fasteners, which is what you want against salt and wind
- A metal roof commonly outlasts two or three shingle roofs, so compare lifetime, not sticker
- It sheds wind and rain well, but the install has to be right or it leaks at the seams
Questions people ask about metal roofing
Is a metal roof loud when it rains?
On a house, no. That reputation comes from barns, where metal spans open framing with nothing underneath. A residential metal roof sits over solid decking and underlayment, and the rain sound is close to what a shingle roof gives you. Some people are honestly disappointed.
Does a metal roof attract lightning?
No, that is myth. Lightning strikes the tallest path to ground regardless of material, and a metal roof does not change your odds. If anything, when a strike does happen, metal is noncombustible and spreads the energy, which is a better story than most materials tell.
Can metal be installed over my existing shingle roof?
Sometimes, with the right underlayment or furring, and it skips the tear-off cost, which is why people ask. The tradeoffs are added weight, hidden decking staying hidden, and manufacturer requirements that have to be followed for the warranty to hold. Get the honest version for your specific roof, not a blanket yes.