Lena Hoffmann
Lena installs and services master-key systems in apartment blocks. She knows every way a cylinder jams before it fails completely.
From the trade to the guide
Lena installs and services master-key systems in apartment blocks. She knows every way a cylinder jams before it fails completely.
Articles by Lena
All articles
Burglary protection in Mannheim: securing Jugendstil and post-war buildings
The Jugendstil old building of the Oststadt and the post-war block in the Waldhof have very different weak spots. How to secure both properly without ruining the character, with real prices.
The master-key system in an apartment block: how it works and what happens if you lose a key
A master-key system is convenient, but a lost key is expensive. How the system works, why it costs so much and who ends up paying.
From List to Suedstadt: securing Hannover's period and post-war buildings
Why so many doors in Hannover come from two worlds, and how to secure the period building and the 1950s post-war building sensibly and affordably.
Night, weekend and holiday surcharges: what the law really says
Nights cost more, that is normal. But how much surcharge is allowed, when must it be announced and when is it legally void?
Securing old wooden doors in Mainz old town without ruining the original fabric
An old wooden or half-timbered door in Mainz can be made secure without wrecking the heritage fabric. You do not replace it, you upgrade it. Here is how.
How to maintain a lock so it lasts
A well-kept cylinder lasts decades; a neglected one gives up after five years. What you can do yourself and the common mistake that ruins a lock.
Securing Nuremberg's old town: timber, sandstone and modern door tech
In Nuremberg's old town you secure a door differently than in a new build. How modern tech fits into timber and sandstone without destroying the fabric.
Burglary protection in Düsseldorf: old build in Pempelfort or new build at the Medienhafen
In an old build the door is the problem, in a new build it is how you use it. Which burglary protection really fits in Pempelfort and at the Medienhafen, sorted honestly.
Burglary protection in Dresden: Neustadt period building or the panel block, what actually fits
In Dresden the right burglary protection is decided by the age of your door, not your budget. A period building and a WBS 70 panel block need completely different things.
Bumping: this break-in technique and how to protect yourself
Bumping opens a cheap cylinder with a single tap. How the technique works and which cylinder reliably secures your door against it.
Key snapped in the lock: real fixes and the mistakes that cost you
A key snapped in the lock does not automatically mean a new cylinder. How the broken piece comes out cleanly and which home remedies make the damage worse.
Reading can wait –
help comes first.
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