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Single Sided Deadbolts for One-Sided Door Operation
Single sided deadbolts are operated from the interior side of the door without an exterior keyed cylinder. Depending on the model, the outside of the door may have no visible hardware, a blank exterior plate, or a solid decorative rose. This makes one-sided deadbolts useful for compatible doors where exterior key access is not required but an interior thumbturn is desired.
Coastal Hardware Store carries single sided deadbolts from Emtek, Better Home Products, Linnea, Schlage, and Baldwin Estate. The current collection includes traditional round deadbolts, modern square and rectangular designs, low-profile options, patio-function locks, U.L.-listed Better Home Products models, and Schlage configurations with or without an exterior plate. For other locking functions, browse our complete deadbolt collection.
Why Choose a Single Sided Deadbolt?
A single sided deadbolt can be a practical choice when a door needs to be locked and unlocked from the interior but does not require keyed access from outside. Because exterior appearance and door preparation differ among products, the right model depends on the application, mounting configuration, dimensions, finish, and any project-specific listing requirements.
- No exterior keyed cylinder: Single sided deadbolts operate without the exterior key cylinder found on conventional single or double cylinder deadbolts.
- Interior thumbturn operation: Current products use an interior turnpiece to extend or retract the deadbolt.
- Different exterior appearances: Depending on the model, the exterior may be blank, have no visible deadbolt hardware, or use a non-operating plate or rose.
- Multiple architectural styles: The current collection includes traditional round trim as well as rectangular, square, disc, low-profile, and other contemporary designs.
- Patio-function options: Baldwin Estate and Linnea are currently represented with one-sided patio deadbolt configurations.
- U.L.-listed options: Better Home Products offers select U.L.-listed keyless or one-sided deadbolts. Confirm the exact listing and specifications required for your project.
- Broad finish selection: Available finishes span brass, nickel, chrome, black, bronze, stainless steel, and additional manufacturer-specific options.
Types of Single Sided Deadbolts Available
Deadbolts With No Exterior Hardware
Some single sided deadbolts are designed so that the locking hardware is visible only from inside the door. Emtek describes its single-sided deadbolts as operating from an interior thumbturn with no cylinder and no hardware on the exterior. The current Emtek assortment includes Regular, Rectangular, Modern, Modern Square, Modern Disc, Wilshire, Urban Modern, and Neos designs.
Single Sided Deadbolts With an Exterior Plate
Not every one-sided deadbolt leaves the exterior completely blank. Schlage offers a one-sided model with a non-operating exterior plate that covers the outside door preparation while the thumbturn operates the bolt from inside. This can be useful when an existing or planned bore needs to be covered without providing exterior unlocking.
One-Sided Patio Deadbolts
The terms "patio function" and "single sided" are used by some manufacturers for deadbolts that operate from the interior without a keyed exterior cylinder. The current collection includes Baldwin Estate's 8231 patio-function deadbolt along with round and square modern one-sided patio deadbolts from Linnea. Exterior appearance and preparation differ by model, so review the exact specifications before ordering.
Low-Profile Single Sided Deadbolts
Better Home Products offers low-profile one-sided deadbolts with reduced-projection trim for shoppers who prefer a more streamlined appearance. The current collection includes both standard and U.L.-listed low-profile BHP options. Specifications and listings vary, so compare the exact product rather than assuming all low-profile models are interchangeable.
U.L.-Listed One-Sided Deadbolts
The current collection includes Better Home Products U.L.-listed keyless deadbolts. These products are specifically identified by the manufacturer as U.L.-listed configurations. If your project requires a fire rating, listing, or other code-related specification, verify the documentation for the exact model before purchase and installation.
Single Sided vs. Single Cylinder vs. Double Cylinder Deadbolts
The terms can sound similar, but the three functions operate differently. A single sided deadbolt has interior operation without an exterior keyed cylinder. A single cylinder deadbolt normally has an exterior keyed cylinder and an interior thumbturn. A double cylinder deadbolt uses a key on both sides.
- Single sided: Interior thumbturn operation with no exterior keyed cylinder. Exterior trim varies by model.
- Single cylinder: Keyed from the exterior and operated by a thumbturn from the interior.
- Double cylinder: Keyed from both the exterior and interior sides.
If you need exterior key access, browse our single cylinder deadbolts. If the application specifically requires keyed operation from both sides, compare our double cylinder deadbolts and confirm applicable egress requirements before ordering.
How to Choose the Right Single Sided Deadbolt
Start by confirming that exterior key access is not needed for the door. Then compare the exterior appearance, door preparation, backset, door thickness, trim dimensions, finish, and any product-specific listing or installation requirements.
- Decide what you want on the exterior: Some products leave no visible hardware outside, while others use a blank plate or decorative rose to cover the preparation.
- Review the door preparation: Check the required cross bore, edge bore, latch face preparation, and any other dimensions specified by the manufacturer.
- Confirm the backset: Many residential deadbolts support common 2-3/8" and 2-3/4" backsets, but this should be verified for the exact model.
- Check door thickness: Supported door thickness varies by product. Do not assume one range applies across Emtek, Baldwin, Schlage, Linnea, and Better Home Products.
- Compare trim dimensions: Round, square, rectangular, disc, and low-profile products have different footprints and may not cover the same existing preparation.
- Verify required listings: If the project requires a U.L. listing, fire rating, or another specific designation, select a product explicitly documented for that requirement.
- Coordinate the finish: Match the exact manufacturer finish with nearby levers, knobs, handlesets, hinges, or other visible door hardware.
Materials, Styles & Finishes
Material and construction vary across the collection. Emtek offers single-sided deadbolts across several decorative trim families, while Schlage publishes premium metal construction for its current residential one-sided models. Better Home Products, Baldwin Estate, and Linnea use their own product-specific materials and construction. Review the individual specifications when base material is an important project requirement.
The current collection includes finishes such as Aged Bronze, Antique Brass, Antique Pewter, Bright Brass, Bright Chrome, Chrome, Flat Black, French Antique, Lifetime Brass, Lifetime Polished Brass, Lifetime Polished Nickel, Matte Black, Oil Rubbed Bronze, Pewter, Polished Chrome, Polished Stainless Steel, Satin Black, Satin Brass, Satin Chrome, Satin Nickel, Satin Stainless Steel, Unlacquered Brass, and Venetian Bronze.
Finish availability varies substantially by manufacturer and model. Similar finish names from different brands should not automatically be considered identical in color, sheen, texture, or aging characteristics. Use the exact manufacturer finish designation when coordinating hardware.
Featured Single Sided Deadbolt Brands
The current collection includes nineteen products from five manufacturers, ranging from decorative architectural deadbolts to straightforward residential and U.L.-listed one-sided configurations.
- Emtek: The current collection includes eight Emtek designs: Regular, Rectangular, Modern, Modern Square, Modern Disc, Wilshire, Urban Modern, and Neos. Emtek specifies its single-sided function as thumbturn-operated from inside with no cylinder.
- Better Home Products: BHP currently contributes six one-sided products, including standard, low-profile, and U.L.-listed keyless configurations.
- Linnea: The collection includes round and square modern one-sided patio deadbolts for shoppers looking for a more contemporary architectural profile.
- Schlage: Schlage currently offers both a one-sided deadbolt with an exterior plate and a version without an exterior plate, allowing shoppers to choose the appropriate outside appearance.
- Baldwin Estate: Baldwin Estate is represented by the 8231 Traditional Deadbolt in its single-sided patio function, which Baldwin defines as interior turnpiece operation with no operating deadbolt on the exterior.
Installation & Compatibility
Installation requirements differ among one-sided deadbolts. Before ordering, compare the manufacturer's specifications with the existing door preparation, including the cross bore, edge bore, latch preparation, door thickness, backset, strike, trim footprint, and exterior-side requirements.
Exterior configuration is especially important. An Emtek single-sided deadbolt is designed with no exterior hardware, while Schlage offers both a no-exterior-plate model and a version with a plate covering the outside preparation. Baldwin, Linnea, and Better Home Products use their own one-sided configurations. Two products can therefore serve a similar function while requiring or displaying different hardware on the exterior face of the door.
For replacement installations, do not assume that a new one-sided deadbolt will cover existing holes or marks simply because the lock function is the same. Compare the dimensional drawing and installation instructions before drilling, enlarging, filling, or otherwise modifying the door.
Shipping & Warranty Information
- Shipping: Quick Ship products usually leave the warehouse within 2-3 business days. Other products average 5-7 business days unless otherwise stated on the product page. Orders of $100 or more qualify for free standard ground shipping within the contiguous United States and District of Columbia. View Shipping Policy.
- Warranty: No single warranty applies to every deadbolt in this collection. Mechanical coverage, finish coverage, listings, eligibility, exclusions, and warranty periods vary by manufacturer and product family. Review the individual product page and current manufacturer warranty information for the specific deadbolt and finish you are considering.
Frequently Asked Questions About Single Sided Deadbolts
What is a single sided deadbolt?
A single sided deadbolt is operated from the interior side of the door without an exterior keyed cylinder. Depending on the model, the exterior may have no visible hardware, a blank plate, or a non-operating decorative rose.
What is the difference between a single sided and single cylinder deadbolt?
A single sided deadbolt does not provide keyed operation from the exterior. A single cylinder deadbolt typically has an exterior keyed cylinder and an interior thumbturn. Choose based on whether exterior key access is required for the door.
Do all single sided deadbolts have a completely blank exterior?
No. Emtek offers single-sided models with no exterior hardware, while Schlage offers both a no-plate configuration and a model with an exterior plate covering the door preparation. Other manufacturers use their own solid roses or trim designs, so check the exterior view of the exact product.
What is a patio-function deadbolt?
Patio function is a manufacturer term used for certain one-sided deadbolts. Baldwin's patio function, for example, has no operating deadbolt on the exterior and uses an interior turnpiece. Linnea also identifies its round and square one-sided models as patio deadbolts. Exact construction varies by manufacturer.
What finishes are available for single sided deadbolts?
The current collection includes brass, nickel, chrome, black, bronze, stainless steel, and other manufacturer-specific finishes. Popular options include Satin Nickel, Flat Black, Matte Black, Satin Brass, Oil Rubbed Bronze, Polished Chrome, Lifetime Polished Nickel, and additional specialty finishes. Availability varies by product.
Do all single sided deadbolts fit the same door preparation?
No. Cross-bore requirements, edge preparation, backset, door thickness, exterior trim, strike configuration, and overall dimensions vary by manufacturer and model. Compare the exact installation specifications with your door before ordering.
Shop Single Sided Deadbolts at Coastal Hardware Store
Coastal Hardware Store offers single sided and one-sided deadbolts from Emtek, Better Home Products, Linnea, Schlage, and Baldwin Estate. Compare standard, modern, low-profile, patio, U.L.-listed, exterior-plate, and no-exterior-hardware configurations along with door preparation, dimensions, finish, and installation requirements to find the appropriate lock for your project.
If you need help determining whether a single sided deadbolt fits your existing door, choosing between an exterior plate and a blank exterior, or comparing finishes, dimensions, or manufacturer configurations, our team can help you review the available options. Contact us at support@coastalhardwarestore.com or call us at 561-808-2588.