Aluminum window sills are horizontal surfaces located at the bottom of a window frame that project outwards from the exterior wall of a building. They are made of aluminum, a lightweight and durable metal that is resistant to corrosion and weathering.

Aluminum window sills can come in various shapes and sizes, depending on the design of the window and the architecture of the building. They can be flat, angled or curved, and can be fitted with a drip edge to prevent water from seeping into the building.

Aluminum window sills are popular for several reasons. They are relatively low-maintenance and can withstand exposure to harsh weather conditions, such as rain, snow, and sunlight. They are also fire-resistant and can be easily shaped and cut to fit any window size.

In addition to their practical benefits, aluminum window sills can also provide a sleek and modern look to a building's exterior. They can be powder-coated in a variety of colors and finishes to complement the overall aesthetic of the building.

Overall, aluminum window sills are a durable, low-maintenance, and aesthetically pleasing option for any building's exterior.