To guarantee a watertight joint, seal the rivets and the top-cap seam on the inside with the gutter which has a large-high-quality siliconized caulk. Photo by Mary Beth Montgomery Use a downspout outlet to mark The placement on the downspout within the reduced end of the gutter. To become truthful, http://gutter97393.tinyblogging.com/Fascination-About-rain-water-control-32775475