How to Maintain Door Hardware
Written by Cornwall Composite DoorsReviewed by Cornwall Composite Doors installersLast updated July 20264 minute read
Short answer
Door hardware such as hinges, locks and multi-point mechanisms should be lubricated roughly once a year with a light machine oil applied sparingly to moving parts. Wipe handles and letterplates with mild soapy water. Never use grease, WD-40 or silicone spray, and if a lock or handle feels stiff or misaligned, book a professional visit.
The door slab itself needs very little attention, but the moving parts — hinges, handles and the locking mechanism — work hardest and benefit from a small amount of routine care to keep everything operating smoothly for years.
Annual lubrication
Once a year, apply a few drops of light machine oil to hinges and the visible moving parts of the multi-point locking mechanism where the keeps engage. Work the door through a few open-and-close cycles afterwards to distribute the oil evenly. This simple step prevents the stiffness that often develops in cold, damp winters.
What not to use
Avoid WD-40, grease or thick oils on locks and hinges — these attract dust and grit, which can build up and cause the very stiffness you're trying to prevent. Silicone sprays should also be avoided near hardware finishes, as they can affect the surface coating on handles.
- Use: light machine oil, sparingly
- Avoid: WD-40, grease, silicone spray
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Cleaning handles and letterplates
Wipe handles, letterplates and knockers with a cloth dampened in mild soapy water, then dry thoroughly. This removes everyday grime without dulling plated or coated finishes. Avoid abrasive cloths or metal polish, which can scratch or strip decorative coatings on chrome, gold or black hardware.
Checking hinge and keep alignment
Occasionally check that hinges are firmly fixed and that the door closes squarely into the frame without needing to be lifted or slammed. Minor seasonal movement is normal, but a door that's become noticeably harder to lock or that catches on the frame should be assessed by a professional rather than forced.
When to call in a professional
If a handle feels loose, a key sticks, or the multi-point lock doesn't engage smoothly after lubrication, don't try to strip or adjust the mechanism yourself — this can cause further damage or void your guarantee. Our full guide to common problems and fixes explains what to look out for.
Frequently asked questions
How often should I oil my door hardware?
Roughly once a year is enough for most homes, though doors in exposed coastal locations or with heavy daily use may benefit from a light lubrication every six months to keep everything moving freely.
Can I lubricate the lock cylinder myself?
A small amount of light machine oil applied to the key before inserting it can help, but if the cylinder itself is sticking or difficult to turn, that's a sign for a professional to inspect rather than a DIY fix.
Why has my handle become loose?
Fixing screws can work loose slightly over time with regular use. Rather than tightening blind, it's best to have a professional check the assembly, since over-tightening or incorrect adjustment can damage the mechanism.
Does hardware maintenance affect my guarantee?
Routine care like annual lubrication helps keep hardware within normal working condition and supports your guarantee. Damage caused by incorrect products, forcing a stiff mechanism, or neglect generally falls outside manufacturing defect cover.
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More maintenance advice
- Fixing Common Composite Door ProblemsMost composite door issues are mechanical rather than structural, and are best diagnosed and fixed by an experienced professional.
- How Often Should You Service Your Door?A little routine care once or twice a year is all a composite door needs to keep working smoothly for decades.
- Can Composite Doors Be Repaired?Most composite door issues are fixable without needing a full replacement, provided the right diagnosis is made early.
