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Window wells are semi-circular in shape and surround the basement window. Typically these are constructed from a solid barrier made of either corrugated galvanized metal, marsonry, plastic or pressure-treated wood.
The purpose of window wells is to prevent moisture damage to the basement windows that at or below grade. It helps keep soil away from foundation opens and allowing for proper grading and drainage. The window well also allows for sunlight to enter a below-grade room as well, emergency access when serving as part of a living area.