What joint should be used for outside corners when installing molding?

Using a mitered joint for outside corners when installing molding is a preferred choice because it provides a seamless and visually appealing finish. Mitered joints are created by cutting two pieces of molding at a 45-degree angle to form a perfect right angle when joined together. This technique allows the two pieces to fit together snugly, minimizing visible gaps and creating a smooth aesthetic transition at the corner.

The mitered joint is particularly effective for outside corners because it directs the eye along the length of the molding, resulting in a sharper and neater appearance compared to other joint types. It is also more effective at hiding the end grain of the cut, which can look less refined if exposed.

In contrast, while other joints can be useful in different contexts, they may not provide the same clean look or structural integrity. For instance, a coped joint is often used for inside corners where one piece of molding fits tightly against the profile of another but does not offer the same aesthetic benefit at outside corners. Scarf joints are used for lengthening pieces of molding rather than creating corners, and half-lap joints, while strong, can be bulkier and less visually appealing for corner finishes.

Choosing the right joint type is crucial for achieving both the desired