Underground downspout extensions are a commonly overlooked item on homes and can contribute to water-related damage to the house. Keeping the gutter system cleaned and maintained, with extensions in place, is a top priority to protect your home from water damage. Over time, water can reach areas it shouldn’t. Rainwater can damage soffit and fascia boards, causing landscape erosion, basement flooding, and even structural damage. If these problems are not solved, water also can get under your roofline and damage your entire roof. In this case, your best option is to hire a professional.