Have almost 30 yrs experience in residential construction/remodeling. And TGIF too.
Thanks. Our landlord just reroofed our house with a metal roof and the roofers were saying it was more expensive up front (around $10k in labor and materials I think the roofer said) but that it should reduce cooling costs by up to 15% and will last considerably longer than a regular asphalt shingle roof. Didn't know if that was true and something to remember for when we own a house again because I'm not against the look of a metal roof for certain styles of houses (I think Craftsman and Victorian styles look sharp with a metal roof that is installed correctly).
Not an exposed fastener I hope, UV degrades the washers on the screws and expansion/contraction with temp changes enlarges the screw holes.
Its exposed fastener but the screws are supposed to have a lifetime warranty and have better washers than the cheap ones that are normally used.
A "true" standing seam roof is a good investment but very pricey. A "snap-lock" standing seam roof is a good choice if budget is an issue. An exposed fastener metal roof IMO belongs on a shed or barn, not a home. The "lifetime" warranties on some asphalt shingles aren't worth the paper their written on. I don'r have enough experience with the stone coated steel roof systems (can look like woodshakes or terra cotta tile) to speak on longevity, but they are a giant PITA to install.