Window Sill

Definition

A Window Sill is the horizontal member at the bottom of a window.

Purpose

The purpose of a window sill is to provide structural support for the window frame and to help direct water away from the window to prevent damage to the wall and interior.

Examples of Use

• Residential Homes: Window sills in living rooms, bedrooms, and kitchens.
• Commercial Buildings: Providing support for larger window installations.
• Historic Renovations: Replacing or restoring window sills in older buildings.

Related Terms

• Sub-Sill: A component located below the window sill to support it.
• Stool: The interior horizontal surface of the window sill.
• Flashing: A material used to prevent water penetration around window sills.

Notes

Window sills can be made from various materials, including wood, stone, metal, and composite materials. Proper installation and sealing are crucial to prevent water infiltration.