A window sill, also known as a window ledge or window bottom, is the shelf-like, flat piece of window trim found at the base of the window. Window sills are important to the design and functionality of the window.
Sills serve a variety of purposes and functionality:
Structural Integrity. The rigid sill on the bottom helps eliminate flexing to support the structure
Improved Energy Efficiency. Provides a barrier for thermal insulation to be installed
Water Protection. Protects the wall and leads water away from the building when it rains and not into your home
Decorative Space. Showcase plants, pictures, candles, etc.
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