When constructing a window well, what is essential to include to prevent water build-up?

When constructing a window well, the inclusion of drainage material is crucial to prevent water build-up. Proper drainage ensures that any water that collects in the window well can effectively flow away, reducing the risk of damage from water accumulation, such as flooding or leaks into the basement.

Using materials like gravel or perforated pipes allows water to filter through and be directed away from the foundation of the house, promoting a dry and safe environment. This prevents moisture-related issues such as mold growth or deterioration of building materials, which can occur if water is allowed to stagnate around the window well.

While other options may have their roles in maintaining the integrity of the structure, they do not address the immediate issue of water build-up as effectively as an appropriate drainage system does.