Never Clean Your Gutters AgainGutter Guard Installation in Stuart, IA

Guards on a metal roof

Metal roofing changes the calculation in two ways. First, it is slick, so runoff accelerates across it and arrives at the gutter faster than it would off asphalt, which is the same overshoot problem a steep roof creates, only more pronounced. Second, snow does not sit on it. It releases in sheets, often all at once, and a sliding snow load hitting the front edge of a guard is a genuinely destructive event that will bend an unsupported product or tear it off its fixings. Houses with metal roofs frequently have snow retention bars fitted for exactly this reason, and where they do not, the gutter and anything attached to it is what stops the slide. The practical answers are a rigid guard with close fixing centres, attention to how far it projects, and a serious look at whether snow guards belong on the roof. There is also no first course of shingles to tuck under, so under-roof attachment is off the table.