Domakihub Install a Door Security Chain That Actually Holds
The fastest, cheapest secondary lock upgrade most Greek apartments overlook — and how to fit it so it does not pull out under force.
Reviewed by Domakihub home & decor pros · 2026-06-23 · 4 min read
A door security chain costs under ten euros and takes less than half an hour to fit, yet most Greek apartments, holiday rentals, and hotel rooms skip it entirely. The video above walks through the fitting process visually; this article adds the detail that actually matters — correct screw length, frame anchoring, and door-leaf placement — so the chain holds under real force rather than popping out of soft plaster at the first shoulder barge. Whether you manage a single flat in Athens or a portfolio of holiday villas on the islands, this is the one security upgrade you can complete before lunch.
Why a Chain Beats a Second Deadbolt for Most Greek Doors
Most apartment doors in Greece already carry a multi-point lock or a Cisa-style cylinder. Adding a second cylinder means drilling the door slab and the frame, coordinating a locksmith, and spending several hundred euros. A security chain requires only four screw holes and a screwdriver, which puts it within reach of any renter or property manager.
The chain serves a different purpose from the primary lock: it lets you open the door a few centimetres to check a caller without fully releasing the latch. For holiday rental guests arriving at night, or hotel rooms where occupants change every few days, that ability to verify before opening is genuinely valuable — and no cylinder lock provides it.
What Greek Construction Details You Need to Account For
Greek apartment door frames are frequently hollow-core aluminium profiles or lightweight composite wood over a metal sub-frame. Standard 25 mm screws supplied in budget chain kits bite only into the outer skin and will pull free under a single firm kick. The fix is to use 50–60 mm screws that reach the solid steel or hardwood sub-frame beneath, or to fit a reinforcing backing plate across the full width of the frame receiver.
Door slabs in older Greek buildings are sometimes thinner than northern European norms, so measure your door thickness before buying. The slide receiver (the piece that mounts on the door itself) needs at least 30 mm of solid material behind it; if your door is hollow at the edge, add a short length of timber blocking inside the void before fitting.
How to Fit a Door Security Chain in 5 Steps
- 1
Choose the right chain and hardware
Buy a chain rated to at least 200 kg tensile load — look for solid brass or hardened steel, not the chrome-plated zinc alloy found in cheap packs. The fixing screws should be No. 10 (5 mm) gauge and at least 50 mm long. If your frame is hollow aluminium, also pick up a steel backing plate (roughly 150 mm x 40 mm) to spread the load.
- 2
Mark the correct height on door and frame
Position the chain at roughly chest height — around 150–160 cm from the floor. This keeps it out of reach of a child pushing fingers through a gap, and at a height where an adult can comfortably slide the chain while keeping the door controlled. Hold the door open just 5–6 cm (the width you want to allow) and mark the receiver position on the frame at that gap, then mark the slide-rail position on the door face.
- 3
Pre-drill pilot holes and fit the frame receiver first
Drill pilot holes slightly narrower than your screw shank so the screw threads cut into solid material rather than spinning. If you are mounting into an aluminium profile, hold the backing plate on the inside of the frame and get a helper to hold it while you drive the screws through from outside — the plate prevents the profile from crushing. Fit the frame receiver (the piece the chain clips into) before touching the door, because the door position must be calibrated against the receiver.
- 4
Fit the slide rail to the door
Close the door to its normal latched position, then open it exactly the 5–6 cm you allowed when marking. Offer up the slide rail so the chain, when clipped into the receiver, has just a centimetre or two of slack — enough to move freely but not enough to let the door open wide enough for a hand to reach the interior handle. Mark, pre-drill, and screw the rail. Drive all screws to a firm stop but avoid over-torquing into composite door edges.
- 5
Test under realistic force before trusting it
With the chain engaged, push the door outward with your shoulder — not a gentle test, but a firm sustained push as if you were trying to force entry. Watch the screw heads: any movement means the fixing has not reached solid material and must be redone with longer screws or a backing plate. A correctly fitted chain on a solid frame should show zero movement. If your rental guests or hotel reception staff will be relying on this, this test step is non-negotiable.
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FAQ
- Can a tenant fit a security chain without the landlord's permission in Greece?
- Greek tenancy law does not prohibit minor reversible fixings that do not damage the structure, but best practice is to ask the landlord in writing first. A chain leaves only four small screw holes that are easily filled, so most landlords agree readily — especially once they see it also protects the property when unoccupied.
- Will a door chain work on a door that swings outward?
- Standard chains are designed for inward-opening doors. If your door swings outward (common on some older Greek exterior doors and balcony-access doors), you need either a surface-mounted outward-opening bar latch or a door limiter bar, which works on the same principle but mounts differently. Check the swing direction before buying.
- How long does a door security chain last before needing replacement?
- A good-quality solid-brass or stainless-steel chain will last a decade or more with no maintenance. The weak point is usually the screw fixings — check them once a year by applying firm hand pressure to the chain. If any screw feels loose, remove it, fill the hole with a wooden toothpick and wood glue, let it cure, then re-drive the screw for a tighter bite.