Gutter guards can do a very good job of keeping gutters flowing freely. If you have big trees in your yard, gutter guards really will save you time and nasty work by helping to prevent your gutters from getting clogged. ... These systems won't prevent ice dams, because ice dams begin to form above the gutter.

Why gutter guards are bad?

Although these cheaper versions are known to stop debris from entering the system, they do also stop water from flowing into the system; building up a layer of mildew and algae which will in turn lead to water pooling on your roof and causing significant structural damage.

Do gutter guards cause problems?

Having a gutter guard installed can also cause problems with the appearance of your home. These systems might stop leaves from getting into your gutters, but this debris can end up accumulating on top of the guard. When this happens, your home can take on a worn-down appearance.