What is a 'Sill' in construction?

In construction, a 'sill' refers specifically to a horizontal piece situated at the bottom of a window frame. It serves multiple important functions, including providing a surface for the window to rest on, helping to shed water away from the window to prevent moisture damage, and contributing to the overall structural integrity of the window installation. The sill also acts as an essential support component that ties together the window frame and the surrounding wall.

Understanding the role of the sill is crucial for anyone involved in construction, as it plays a significant part in ensuring that windows are effectively installed and function properly within a structure. Moreover, the design and material of the sill can influence both the aesthetics and energy efficiency of the building.