Several years ago when we were having the house resided, I asked the subcontractor about gutter covers. We always had a problem with leaves in the gutters. He suggested instead of the more solid guards like Leafguard using something like this; he thought they were just as effective and far less expensive. I asked if he'd install them independently rather than as a subcontractor to the other company, he agreed, and offered a very good price. We have fewer big trees in the yard since getting rid of a couple of problems - like a huge hickory that spread nuts all over and the pines that were hit by borers, but the screens have been great and far cheaper than what the gutter company had offered when we got new wider gutters. Another thing that makes a difference is getting the wider gutters vs what most contractors put up when they build.
My parents had new name brand gutters installed here with the matching expensive covers. I noticed water running over the gutters earlier today when it rained. I think keeping trash out of the gutters with guards is probably on par with keeping squirrels out of bird feeders - nothing is going to work perfectly. The type in the picture need to be a pretty stiff metal and rounded upward.
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