ᐅ How would you assess the burglary resistance of the following windows?

@Mizit
What do the locking cams look like? How many millimeters are they worn down? Older windows show cams that are only half worn, meaning they only engage halfway into the lock. The further the cam moves into the lock, the more leverage is required.

Best regards in brief

Mycraft schrieb:
And then you probably only have RC2N

If I were you, I wouldn’t install mushroom cams but additional locks. That is cheaper but possibly offers equivalent protection.

What exactly do you mean by these additional locks? A lock on the handle? But that wouldn’t change the possibility of relatively easy prying open, right?

Caspar: No, not any more quotes yet. 300 euros per sash still seems very expensive to me; we definitely need to get more quotes. But if it really is THAT expensive, in my opinion these retrofits hardly make sense and new windows would be a better investment by comparison. Although we definitely can’t replace all windows at once now, investing several thousand euros in old windows, hmm.

Yvonne: I haven’t measured these locking pins yet, I need to do that when I get the chance!

ypg schrieb:
The further the latch moves into the strike plate, the more leverage is needed

Will that really make a difference with a standard locking mechanism? Does it take 4 seconds instead of 3? Lifting over it is lifting over it, so it probably doesn’t matter much how far it slides into the strike plate.

Mizit, please use your preferred search engine and look up "bar lock."

Locks in the handles cannot and should not serve as protection against prying; rather, they are an additional security measure: securing only the closed window against prying open, but not the tilted window against full opening, would only be a partial solution. A balcony door can be quietly compromised by using a glass cutter to create an opening for reaching the handle lever. Kicking the door in is what makes noise—the noise the burglar wants to avoid. The burglar’s time starts running out as soon as they are noticed.

Replacing the locks per sash should remain within a double-digit range in cost, and I would estimate about half an hour of labor per replacement. I cannot provide exact prices, but even older aluminum frames are in demand for this. Your PVC windows are still in very good condition. In my opinion, this would be a worthwhile investment.

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11ant schrieb:
Using a glass cutter to create an opening for the handle on a balcony door is a quiet method

And it takes way too long with triple glazing.

11ant schrieb:
Replacement per sash should remain within double-digit costs

That is the price for new construction or new windows.
A simple online search shows prices starting at at least 150 € per sash.