What is the term for a square strip fastened to the inside corners with siding butting to it?

The term for a square strip fastened to the inside corners with siding butting to it is known as a corner strip. This component is used primarily in siding applications to provide a clean and finished look to the intersection of two walls. The corner strip serves as a transition point that helps to neatly cover the edges where two pieces of siding meet at an angle, ensuring that there are no gaps or exposed edges that could lead to water infiltration or aesthetic issues.

Utilizing corner strips is standard practice in construction, as they help create a polished and professional appearance while also contributing to the durability and integrity of the building's exterior. They are often made of the same material as the siding and can be painted or finished to match, further enhancing the visual continuity of the structure. Understanding this component's role can help in proper siding installation and maintenance.