What is Window Sill?
A window sill is the flat surface found at the bottom of a window. It can be located on the inside, outside, or both sides of a window opening.
Definition
Purpose
A window sill completes the bottom edge of a window and helps protect the surrounding wall from moisture.
Exterior sills are designed to direct rainwater away from the building, while interior sills often provide a finished surface inside the room. Depending on the design, window sills can be made from materials such as stone, vinyl, or wood.
In many homes, wood sills and window designs are chosen to match interior trim and create a more traditional look. If additional depth is needed, a window sill extender can be installed to increase the usable surface area.
Examples of Use
- Interior finishing: A window sill creates a clean, finished look around a window opening.
- Water management: Exterior window sills help channel water away from the wall below the window.
- Decorative display: Homeowners often place plants, photographs, or small decorative items on a window sill.
Related Terms
Notes
- Window sills can be installed on both new construction and renovation projects.
- Damaged or poorly sealed sills can allow moisture to enter the wall assembly.
- The material used for a window sill often depends on the window type, location, and design style.
SHARE TO
Get a Step-by-Step Beam AI Walkthrough
Fill out this form and see how easy it is to set up takeoffs, export reports, and get ready-to-use quantities.
.webp)
