Low slope roofing, commonly called interlocking seam roofing, is a term usually applied to roofing systems with a measured pitch of between .25:12 and 3:12, according to Metalconstruction.org. Such roofs are generally favored for commercial and industrial applications as they tend to cost less than traditional roofing and they last considerably longer than wood or other organics.
Low slope roofs have a number of advantages over wood, ceramics and composite materials. Metal interlocking seam roof designs require very little attention once they are installed, as the metal used in their construction is not vulnerable to the elements in quite the same way as other roofing materials. Low slope roofs allow water to drain away without absorbing it the way an aging wood shingle roof can. They also weigh very little compared with some of the thicker ceramic options, and are less prone to collapse over time. The low profile these roofs present makes them highly resistant to wind, which is one reason for their popularity in areas with periodic tropical storms and other violent weather. Low slope roofs have another advantage, according to Metalconstruction.org, in that they are typically covered by warranties of up to 30 or 40 years. This has the effect of lowering their maintenance cost still further.