
How do I recognize RC2 windows?
Video: RC2 windows in a practical test
RC2 windows: the distinguishing features in detail
Resistance class RC2 is one of the most popular options that many builders and renovators consider. But how do you actually recognize RC2 windows? In this article, we highlight the features and signs that will help you identify RC2 class security windows.
To recognize RC2 windows, you should look for a number of specific features that characterize the security standard. The most important features include:
Sturdy frame and robust fittings
RC2 windows are usually equipped with a sturdy frame made of high-quality materials such as wood, aluminum or reinforced plastic. The fittings are specially designed to prevent the window from being easily pried open or torn off. RC2 windows contain special locking mechanisms, in particular so-called mushroom head locks: these are metal bolts that have the shape of a mushroom head - i.e. a round, flattened top - and are integrated into the window or door frame.
When the window or door is closed, the mushroom head bolts press into special openings in the frame and make it considerably more difficult to pry open the window or door, as the bolts "jam" with the openings when closed. Several of these mushroom-shaped bolts are often fitted at different points along the frame, which provides additional protection.

Reinforced glazing
A typical feature of RC2 windows is the use of security glass. This glass is either multi-glazed or consists of laminated safety glass, which does not shatter into dangerous fragments in the event of an attempted break-in. The glass surfaces should be appropriately marked to indicate the security class.
Experience shows, however, that "safety glass" (P4A) installed only in accordance with the standard offers hardly any security: it is usually quickly smashed. The glass should therefore be at least as secure as the RC2 window, such as SILATEC P6B security glass.
Certification of RC2 windows
Window models that are certified as RC2 should bear a corresponding test mark. This test mark can usually be found on a sticker or sticker on the window frame or on the technical documentation. Make sure that the test mark comes from a recognized test centre.
Locking systems
A common and striking feature of RC2 windows are the special locking systems. These should have several points to anchor the window firmly in the frame when closed. Locks or locking elements visible from the inside are a further indication of the security requirements of class RC2.
However, experience shows that lockable window or door handles hardly prove themselves in practice: This is because every time you leave the house, you have to lock all the doors and windows in the house and open them again when you return. This is hardly realistic in everyday life. It makes more sense to have appropriately secure glass that prevents the window from being smashed and thus pried open from the outset.
Security accessories for RC2 windows
RC2 windows are often equipped with additional security accessories, such as lockable window locks or so-called "window alarm systems". These features can further increase the security standard and have a preventative effect by deterring potential burglars.
Questionnaire on RC2 windows
If you are considering making a purchase for an RC2 window or want to check existing windows, it makes sense to ask a few questions:
- Are the windows and glass from a recognized manufacturer?
- Are the relevant certificates available?
- Do the windows have clear security class labeling?
- How are the fittings and glazing designed?
- Are additional security mechanisms integrated into the window?
Expert advice on RC2 windows
Identifying RC2 windows can be complicated if you do not have the necessary specialist knowledge. It is advisable to seek advice from experts who specialize in security technology. They can provide you with valuable information and help you choose the right windows for your specific needs.
RC2 Windows: Conclusion
Choosing the right window security is a crucial step in protecting your home. RC2 windows offer a good level of security and can be integrated into a stylish design. By using the above features and seeking expert advice, you can ensure that you are investing in high quality, secure windows. After all, security should not only be guaranteed in one of the most beautiful forms, but also in one of the most secure rooms in the world - your home.
Christoph Hahn
Experte für SicherheitsglasAs a civil engineer, I was fascinated by the world of fire-resistant glass and car windows long before my studies. During my academic career, I began to focus intensively on bullet-resistant and burglar-resistant glazing. Instead of going to the gym, I preferred to break a pane or two - a passion that I still practice today. I have dealt with around 3,000 real burglary attempts, most of which I have personally inspected. In addition, I have carried out and tested around 1,000 shot tests on glass. Together with renowned universities, I am active in various research groups, with glass always at the center.
Does that make me an expert? Maybe there is always someone who knows more, but I always strive to expand my knowledge and gain new insights.

















