Identify it. Measure it. Match it.
Start with the job
What are you trying to do?
How to Fix a Sagging Door: Check Hinges Before Cutting
Diagnose a sagging door, tighten hinges, repair stripped wood screw holes, and decide when longer screws, shims or replacement hinges are appropriate.
By The Door Folks Editorial Desk · October 10, 2026 · 5 min readLatest
Full Mortise Hinge: Identify and Match a Replacement
Identify full mortise mounting, measure both leaves, and check thickness, corner radius and screw preparation before choosing a replacement door hinge.
Heavy-Duty Door Closer: Match Grade, Power and Mounting
Choose a heavy-duty door closer by ANSI/BHMA grade, spring size, arm construction and opening force—not door weight or appearance alone.
Deadbolt Latch: Identify and Match a Replacement
Match a replacement deadbolt latch by model, backset and door preparation. Use open-door tests to separate bolt problems from strike or frame misalignment.
Ball Bearing Hinge: Identify, Measure and Match a Replacement
Compare standard- and heavy-weight ball bearing hinges, identify bearing housings, and check thickness, screw patterns and opening requirements before ordering.
Flush Bolt for Double Doors: Identify, Measure and Replace
Choose a replacement by operation, door preparation, rod length and strikes. Check astragal compatibility and code restrictions before changing hardware.
Standard Door Knob Height: Measure to the Center
Measure knob height from the finished floor to the lock center. Use 36 inches for a new basic layout, but match the strike on replacement doors.
More articles
Overhead Door Closer: Identify, Measure and Replace It
Identify a surface or concealed overhead closer, measure its preparation, and match its power, arm, handing and safety requirements.
Offset Door Hinges: Types, Measurements and Selection
Distinguish swing-clear, wide-throw and offset-pivot hinges, then measure the opening, door and existing preparation before ordering.
Offset Hinges: Types, Measurements and Selection
Identify swing-clear, wide-throw and offset-pivot hinges, measure the clear opening and existing prep, and verify door compatibility before ordering.
Cylinder Door Locks: Identify and Measure Before Replacing
Identify a cylindrical lockset or removable cylinder, then match its bore, backset, door thickness, function and cylinder format.
Spring-Loaded Door Hinges: How to Match and Adjust Them
Match spring-loaded hinges by size, screw pattern and door capacity, then adjust tension safely and check fire-door or accessibility requirements.
Door Hinge Placement: New vs Replacement
Use customary spacing only to start a new basic layout; for a replacement slab, copy each mortise from one clearly named reference point.
Single-Stair Apartment Self-Closing Door Requirements
See when a single-stair apartment door must self-close, why the safety data depend on working closure, and how to verify the opening and local code.
Does Schlage Sense Pro Fit Your Door? 10 Checks
Measure door thickness, bores, backset, strike, and clearance, then check whether Sense Pro’s keyless, Apple-first access suits your household.
Nest x Yale Replacement: Will Matter Fit the Same Door?
Compare bore, backset, door thickness, strike alignment, Google Home support, and Nest Connect changes before replacing the lock on the same door.
Will My Level Lock Still Work? Local vs. Cloud Features
Check which Level Lock features rely on local hardware, Apple Home, Matter, Bluetooth, or Level’s cloud, plus the backups to configure before an outage.
What Must Match for a Schlage Lock Cylinder Replacement?
A cylinder that accepts an SC1-style or Schlage C-keyway key may still have the wrong body, housing height, length, tailpiece or retaining method.
How to Measure Door Hinges for a Drop-In Replacement
Open a butt hinge flat. Measure height along the pin and width across both leaves, then match the corner radius.