
Gerda: a cylinder, a lock, sometimes the whole door
Gerda is a Polish manufacturer. It makes cylinders, mortise and multi-point locks, and security doors. That decides how big the job is. In an ordinary door only the cylinder is changed, which is quick. In a security door the lock may be matched to that particular leaf, and the replacement is chosen by its markings.
The markings are stamped on the lock’s faceplate, the metal strip in the edge of the door you see when it is open. A photo of that strip and the escutcheon tells a tradesperson far more than “the lock sticks”.
Some Gerda cylinders come with a code card, and new keys can’t be cut without it. If you have one, keep it at home, not in your wallet next to the keys.
Price ranges and offers from tradespeople: front door lock replacement in Warsaw.
Repair or replace
Not every sticking lock needs to go. If the key is stiff only with the door closed and turns freely with it open, the leaf or strike plate is out of line and an adjustment will do. If it is stiff all the time, the cylinder is worn, and a new one is simpler than taking the old one apart. After a break-in attempt or lost keys there is nothing to repair: the cylinder gets replaced. The whole mortise lock is changed only when the bolts won’t throw fully or something inside has cracked.
What to have ready
- Photos: the door from both sides, the escutcheon and the faceplate on the door edge.
- The cylinder size if you can measure it: length on each side from the fixing screw.
- The code card, if one came with the set.
- The landlord’s consent, if you rent.
Where it usually goes wrong
- Replacing the lock when the door needs adjusting. The leaf has dropped, the bolts rub on the strike plate, and any lock will feel stiff.
- Fitting a cylinder below the door’s security grade. A security door only works as one with matching protection.
- Leaving the cylinder sticking out of the escutcheon. It can be snapped off from outside.
- Oil instead of graphite or lock spray. In a few months the mechanism is clogged with dust.
- Forcing a key that won’t turn. A key snapped in the cylinder means extra work.
Finding someone for the job
Describe what the lock is doing in the app and attach the photos listed above. The order goes to tradespeople who take this work in Warsaw, and they reply with a price and a date.
You compare prices, ratings and reviews and choose one; only then are contact details shared. You pay the tradesperson directly, and he issues the invoice. The cylinder or lock is a separate cost, small fixings are usually included in the labour. Whoever did the fitting answers for it. A warped leaf or damaged frame is not on him, so describe their condition up front.
Order in the app
Describe the job, add photos and the address. Tradespeople send their own prices and dates, and you pick one of the offers.
Open the app


