Mine could use a good pressure washing (exterior) but have never accumulated debris - not even the usual shingle wear stuff. It'll be ten years in November since they were installed. Mine have performed well.
Here's one thing to consider about the LeafGuards - if they get damaged (dented or deformed) they probably won't work. Potential sources of damage include falling tree limbs, wayward recreational items like arrows and baseballs, and roofing contractors. Just a thought.
20 bucks a foot, seamless copper, soldered joints, add total footage with downspaouts included. The only waay to go.
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Seamless Polyurea Roofing Membranes for Metal Roofing, Roof Leak Repair, Seamless Commercial Spray Foam Insulation, Seamless Commercial Roofing, SPF Roofing, Industrial Insulation, Our trucks are red but our roofing is GREEN!