Leaves, dirt, and debris build up in gutters and downpipes, causing them to become clogged. This may lead rainwater to overflow the gutters and cause added weight on the gutter joints, which leads to leakage, damage, and other issues to the walls and even the fascia board. Overflowing water is unhealthy for your roofing system and leads to dampness, rot, mold growth, and water damage. It is also expensive to repair this kind of damage, so make sure to maintain your gutters regularly.