A standing seam roof is among the most durable and maintenance-free type of any metal roof and has a 40-year warranty. Standing seam roofing provides additional energy reduction benefits and can be installed easily, in many instances over the existing roofing material. The standing seam metal roof is the one gaining fast in popularity. The biggest advantage to using this style of roof is its durability. These roofs are built to last, so they are resistant to rust and have extraordinarily little fade in the sun. They tend to last much longer than a standard asphalt roof - up to 50 years in comparison to the 12 to15 of an asphalt roof.
Cons: Metal Construction Association says oil canning “is an inherent part of light gauge cold formed metal products, particularly those with broad flat areas.” Because oil canning is an “inherent” property of light gauge metals. — oil canning is not cause for rejection. Flutes or striations with backer rod significantly reduce oil canning.