Can you fit a smart lock to a composite door?
Usually, yes — a composite door locks the same way as a uPVC one. What makes it different is everything around the lock: a thin skin, a solid core and a door that is often thicker than you expect.
SmartLocksUK editorial · 17 Oct 2026 · 4 min read
Guides and assessments of the smart locks sold in the UK, written by people who fit them for a living. No sponsored posts, no invented test scores — just what these things are actually like once they are on a door.
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Fitting a smart lock to a door whose multipoint lock is faulty
On most uPVC and composite doors a smart lock does not replace the locking mechanism — it drives the one already in the door. If that mechanism is worn or broken, the fault comes with it.
17 Oct 2026 · 6 min
Yale Conexis L1 or L2: the same lock with a different brain
The Conexis L2 is not a new lock. It is the L1's hardware with a new connectivity module, a new app and a Wi-Fi bridge. Whether that is worth having depends on one question: do you need to open the door when you are not standing at it?
16 Oct 2026 · 6 min
Tuya: the platform behind the badge
Tuya gets called a Chinese lock brand. It is not a lock brand at all, and almost every complaint and every bargain in this corner of the market follows from that one fact.
25 Sep 2026 · 8 minAsk an installer
The questions we get on nearly every job, answered properly.
The names on the box
All assessments →Yale
Fits: Conexis replaces the handle set; Linus sits inside and keeps your key
Flat battery: Conexis L2 has 12V contacts outside; Linus, your key
Weak spot: The app
Assessment →Nuki
Fits: On the inside, turning the cylinder you already have
Flat battery: Your existing key
Weak spot: Needs a cylinder that suits it
Assessment →TTLock
Fits: Depends on the lock you buy
Remote access: Needs a gateway near the lock
Weak spot: Build quality varies by maker
Assessment →Tuya
Fits: Depends on the lock you buy
Connects: Wi-Fi directly, or through a hub
Weak spot: Two locks on one app can be nothing alike
Assessment →More to read
Nuki: the one that leaves your door alone
Yale: the safe answer, and what it costs you
Are smart locks more secure than a normal lock?
Digital, electronic, keyless, smart: do the names mean anything?
TTLock: what it actually is, and who it suits
PIN, fingerprint, card, app or key: which to actually use
Smart locks and tenancies: what each side needs to check
