What actually clogs a gutter around here
Fargo does not have the dense leaf canopy of a city full of mature oaks and maples, so a lot of homeowners assume gutter guards are not worth it. What they are missing is cottonwood fluff, which drifts in from every direction in early summer and packs into a downspout elbow like insulation, and box elder seed, the winged pods that fall by the thousands in autumn and jam against any screen with gaps wide enough to let them in but not wide enough to let them wash through.
A guard rated for oak leaves has openings too large to stop fluff and too small to let seed pods pass, so it ends up clogging on the surface instead of inside the gutter. We size the mesh for what actually falls on Fargo roofs, not for a national average.
The tradeoff every guard makes
Every gutter guard on the market is a tradeoff between keeping debris out and letting water in fast enough during a heavy downpour. A mesh too fine sheds water off the front edge in a real storm instead of letting it through. A mesh too coarse lets in exactly the fluff and seed we are trying to keep out.
We walk homeowners through that tradeoff honestly rather than selling whichever guard has the best margin. For most Fargo roofs a mid-density micro mesh over a solid aluminum frame handles both the summer fluff and the fall seed without choking off a hard rain.
Installing over an existing gutter versus a new one
Guards go on cleanly over an existing gutter that is still in good shape, which is the more common job for us. We clean the gutter completely first, since sealing debris under a guard just moves the clog somewhere harder to reach. On a gutter we are replacing anyway, the guard gets fitted and pitched as part of the same job so the whole system works together from day one.
Either way, the guard has to tuck under the shingle edge and sit at the right angle to shed fluff and seed off the front rather than letting it settle on top of the mesh.
What guards do not eliminate
We tell every customer this up front: guards reduce cleaning, they do not remove it entirely. A hard windstorm can still pile debris on top of a guard, and downspout elbows still need an occasional check even with a good guard on the gutter above them. What guards do reliably fix is the twice-a-year climb up a ladder to scoop wet fluff and rotting seed pods out by hand, which is the part people actually hate.
On a two-story house or a steep roof where getting on a ladder is the real risk, that reduction alone is usually worth the cost of the guard.