DoublePro is Alu-Rex's continuous hanger with a dual-layer gutter guard built in, for new 5 in. and 6 in. gutters. Micro-perforations over offset slots keep pine needles out, it drains 40.6 in. of water per hour per linear foot on a 5 in. gutter, and it carries lifetime clog-free, sturdiness and manufacturing warranties that include coniferous areas.
DoublePro is Alu-Rex's flagship, and the reason it exists is pine needles. It is a continuous hanger with a gutter guard built in, made from two sheets of aluminum instead of one. The top sheet carries rows of 7/64 inch holes; the sheet under it has long oblong slots, and the two patterns are offset so there is no straight path from the roof into the gutter. Water gets through by surface tension and the suction the two layers create between them, which Alu-Rex calls Vortex. Needles and fine debris stay on top until the wind takes them. On a 5 inch gutter it drains 40.6 inches of water per hour per linear foot, and 49.2 inches on a 6 inch gutter.
The other half of the product is the hanger. DoublePro replaces spikes and spaced brackets with one piece that runs the length of the gutter: the front hooks inside the gutter lip, the back is screwed into the fascia every 24 inches with the self-sealing screws in the box, and the curved front edge, Roll-Back+, turns any overflow back into the trough. The current specification sheet rates it at 438 lb per linear foot. In a Canadian winter that matters twice. Snow and ice stay on top of the guard rather than filling the gutter, and the full-length support stops the gutter bending under the load.
The warranty is what sets DoublePro apart on a quote. Alu-Rex covers it for life on manufacturing, on sturdiness and on clogging, and the clog-free cover is written to include coniferous areas, which the single-layer guards exclude.