Smart Lock Compatibility Guide UK Doors¶

Which smart locks work with UK uPVC, composite, timber, and French doors - cylinder types, door thickness, and locking mechanisms explained.

Understanding UK Door Types and Cylinder Compatibility¶

Most UK smart locks are designed for Euro-profile cylinders, which are standard on uPVC, composite, and timber external doors. The three common cylinder lengths are 60 mm (30/30 split), 70 mm (35/35), and 80 mm (40/40). Measure your existing cylinder - the distance from the centre screw hole to each edge determines the size. Backup locks like the Brisant Secure Smart cylinder work with all TS 007 cylinders. Composite doors typically have a stepped or rebated profile; the Nuki 3.0 Pro includes shims to compensate. For timber doors thicker than 54 mm, the Ultion Keyturn provides an extended tailpiece kit. French doors require a single-point lock on the active leaf - the Yale Conexis L2 is a popular choice. Patio doors and sliding doors are generally not compatible with standard smart locks and require specialist systems.

Door-Specific Fitting Notes and Brand Recommendations¶

uPVC doors: Nuki 3.0 Pro (£179) fits most Euro cylinders with minimal modification - avoid overtightening the mounting screws as uPVC frames can crack. Composite doors: The Ultion Keyturn WiFi (£279) includes padded spacers to level the lock body on uneven composite surfaces. Timber doors: Yale Linus (£129) is lightweight and suits flush timber doors well. For doors with a multi-point locking system (common on uPVC), the smart lock only engages the main deadbolt - the multi-point hooks and rollers remain manually operated. Check the door's backset: 35 mm is standard for uPVC, while 45 mm is more common on composite. Always test full lock throw before final tightening.

Specifications and Comparison¶

Door Type	Compatible Smart Lock	Cylinder Type	Price Range (£)
uPVC	Nuki 3.0 Pro	Euro-profile 60/70 mm	129 - 179
Composite	Ultion Keyturn WiFi	Euro-profile 70/80 mm	199 - 279
Timber	Yale Linus	Euro-profile 60 mm	99 - 129
French	Yale Conexis L2	Euro-profile 70 mm	199 - 239

FAQ¶

Will a smart lock fit my composite door?: Yes - composite doors use standard Euro-profile cylinders. Brands like Ultion and Nuki include shims and spacers to handle the stepped profile of composite doors.
Do smart locks work on multi-point locking systems?: Smart locks only control the main deadbolt, not the multi-point hooks. You must still lift the handle to engage the multi-point locking as usual.
Can I fit a smart lock to a uPVC back door?: Yes - provided the door has a Euro-profile cylinder. The Yale Linus and Nuki are the most recommended for uPVC back doors. For more information see our Smart Lock for French Doors UK.

Last updated: 2026-05-31.

External Resources¶

For further information consult authority guidelines at the UK Government Building Regulations.