Interior Door Bolt Types

Interior door bolts offer an additional layer of security and privacy within a home. While often overlooked, selecting the right type of bolt for a specific door and purpose is crucial. This article outlines common types of interior door bolts, highlighting their functionalities and applications.

Surface Bolts: Surface bolts, also known as slide bolts or barrel bolts, are among the simplest and most common types. They consist of a bolt that slides into a receiver or keeper mounted on the door frame. Installation is straightforward, requiring minimal modification to the door or frame. Surface bolts are generally suited for applications where high security isn't paramount, such as securing closet doors, pantry doors, or shed doors. They are available in various sizes and finishes to match existing hardware.

Flush Bolts: For a cleaner, more integrated look, flush bolts are an excellent choice. As the name suggests, these bolts are mortised into the edge of the door and the door frame, creating a flush surface when the bolt is retracted. Installation requires more effort, involving precise routing and chiseling. Flush bolts offer a more refined aesthetic and are often preferred for French doors, double doors, or situations where a discreet appearance is desired.

Chain Bolts/Chain Guards: Offering a balance between security and accessibility, chain bolts or chain guards consist of a chain attached to the door and a track mounted on the frame. This allows the door to be opened slightly for identification or ventilation while still providing a level of security. Chain bolts are commonly used on entry doors, allowing occupants to communicate with visitors before fully opening the door. They are not designed for high-security applications and can be easily bypassed with force.

Spring Bolts: Operating with a spring mechanism, spring bolts latch automatically when the door is closed. These bolts typically have a button or lever on one side of the door to retract the bolt and open the door. They are commonly found on bathroom or bedroom doors, offering a simple and effective privacy solution. Some spring bolts also incorporate a locking mechanism for added security.

Turn Buttons/Turnbolts: Turn buttons, often referred to as turnbolts or thumbturns, are a basic locking mechanism typically used for privacy rather than security. They consist of a rotating button or lever on one side of the door that engages a latch on the other side. These are frequently found on bathroom and bedroom doors, providing a simple method of securing the door from within. Turn buttons rarely offer key access from the outside.

Deadbolts: While generally associated with exterior doors, deadbolts can also be used on interior doors requiring higher security, such as home offices or rooms containing valuables. Deadbolts offer superior resistance to forced entry compared to other bolt types. They are operated by a key or thumbturn and extend a solid bolt into the door frame. When choosing a deadbolt for an interior door, consider whether keyed access from both sides is necessary.

Rim Locks: Rim locks are mounted on the surface of the door, rather than being mortised into it. These locks often incorporate a latch and a deadbolt or a spring bolt. They are easier to install than mortise locks but generally offer less security. Rim locks are sometimes chosen for older doors where mortising might be difficult or compromise the structural integrity of the door.

Key Considerations When Choosing an Interior Door Bolt:

Security Level: Assess the level of security required for the specific door. For basic privacy, a simple turn button or spring bolt may suffice. For higher security needs, consider a deadbolt or flush bolt.

Aesthetics: The appearance of the bolt should complement the door and surrounding hardware. Consider the finish, style, and size of the bolt in relation to the door's design.

Ease of Installation: Some bolts require more complex installation than others. Consider your DIY skills and the tools available when selecting a bolt type.

Door Type: The type of door will influence the appropriate bolt choice. For example, flush bolts are often preferred for double doors, while chain bolts are common for entry doors.

Accessibility: Consider who needs access to the room and whether keyed access is required. For bathrooms, a simple turn button or spring bolt with an emergency release mechanism is often preferred.

Budget: Door bolts are available at a wide range of price points. Set a budget before beginning your search to narrow down your options.

By carefully considering these factors, homeowners can select the most appropriate interior door bolt for their specific needs, enhancing both privacy and security within their home.