
Deadbolt Installation Options for Columbia Homes — Single Cylinder, Double Cylinder, and Beyond
Not every deadbolt suits every door, and choosing the wrong type can create a security gap or even a safety hazard. The most common residential choice in Columbia is the single-cylinder deadbolt, which uses a keyed exterior and a thumb-turn interior — a solid upgrade over a basic door knob lock that can often be defeated with minimal force. For doors with glass panels close to the lock, a double-cylinder deadbolt (keyed on both sides) removes that vulnerability, though it requires careful consideration of fire-egress rules. Our technicians walk you through every trade-off before installation so you make an informed decision for your household.
We also install jimmy-proof deadbolts, sometimes called rim deadbolts, which are surface-mounted on the interior face of the door and interlock with a strike plate in a way that makes prying extremely difficult. These are particularly popular on older Columbia homes where the door edge is too narrow for a standard mortise pocket, and on rental properties in areas like Rosewood or North Columbia where landlords want a visible, tenant-friendly security upgrade. Whatever style you choose, our team sources quality hardware from respected manufacturers such as Schlage and Kwikset and ensures the installation meets current residential security standards.




