Clogged gutters are a big problem many homeowners face every year. It doesn't take much to cause clogging of gutters. It typically starts with a few pine needles or leaves covering the downspout. This will cause other debris to build up, and before you know it, you have overflowing gutters. They can cause water damage to the roof, walls and house foundation. Overflowing gutters promote dampness and mold growth. Gutter Cups is a unique product designed to protect gutters from clogging and overflowing.