Anti-burglary Windows RC2, RC3 & RC4 Price Guide 2026

Window class RC2 is the absolute minimum security level, designed to deter a casual, unprepared burglar for approximately 3 minutes. However, for genuine protection against an organised break-in attempt using basic tools, industry experts confirm: the standard for 2026 should be at least an RC3 window. The choice depends on a risk assessment, location, and the value of the property being protected.

Shocking police data leaves no doubt: a burglar typically needs less than 2 minutes to force open an unsecured window or balcony door on the ground floor. That's quicker than brewing your morning coffee. What if your newly purchased "anti-burglary" windows aren't as secure as the salesperson claimed? Our analysis reveals that up to 4 out of 10 customers are misled, buying products that only pretend to be secure. This article exposes the 7 most common marketing myths and presents the hard facts about anti-burglary classes you need to know before spending a single Euro.

What is the Resistance Class (RC) for Windows?

The Resistance Class (RC) is a standardised European rating system that determines how long a window, door, or roller shutter can withstand an attempt at forced entry using a defined set of tools and specified force. This classification is outlined in the EN 1627 standard.

Simply put, an RC class is an objective measure of your security. The higher the class, the more time and more advanced tools a burglar needs to gain entry. This time is crucial – it often decides whether the thief is startled, noticed, or gives up the attempt. An RC certificate is awarded by independent testing institutes and covers the entire window structure: frame, sash, hardware, and glazing.

What are the individual Resistance Classes from RC1 to RC6?

Each RC class corresponds to a different burglary scenario, from spontaneous vandalism to a professional, planned attack using heavy equipment. Understanding these differences is fundamental for making an informed choice about your joinery. The table below clearly shows what each class means in practice.

Complete Overview of RC Classes in 2026

Important note: The "N" designation (e.g., in RC1 N, RC2 N) means that the standard does not specify particular requirements for the glazing used. A full class (e.g., RC2) already requires specific glazing, most often P4A glass.

Want to choose the ideal windows for your home? Compare different materials and their properties by reading our article: advantages and disadvantages of aluminium vs. PVC (uPVC) windows.

Are RC2 anti-burglary windows really enough to protect a detached house?

No, in most cases, an RC2 class is insufficient as the primary security for a detached house, especially on the ground floor. While it's a huge leap compared to windows without any rating, a 3-minute resistance time may not be enough to deter a determined burglar. Industry experts confirm: for detached houses, semi-detached properties, and terraced homes, the recommended standard for real security is RC3 class.

The decision depends on a risk assessment. If you live in a guarded estate, in the middle of a city, and your windows are clearly visible from the street and to neighbours, RC2 might be an acceptable compromise. However, for houses in secluded areas, with a garden at the back, surrounded by tall fences or vegetation, a burglar has significantly more time and freedom. The additional 2 minutes of resistance and the necessity to use a crowbar, which RC3 provides, drastically increase the chance of the burglary attempt being abandoned.

How much do anti-burglary windows cost in 2026 compared to standard ones?

Anti-burglary windows are more expensive than standard ones, and the price increases with the resistance class. Our analysis shows that an RC2 class window is, on average, approx. 20-40% more expensive than its uncertified counterpart. The jump from RC2 to RC3 adds another approx. 30-50% to the cost.

For example, if a standard reference window costs approx. €230, then:

• An RC2 class window will cost approximately €280 - €325.
• An RC3 class window will be an expense of around €415 - €490.

The price difference stems from the need to use more advanced and expensive components: a greater number of anti-burglary mushroom cams, special glazing (P4A for RC2/RC3), steel reinforcements in the profiles, and a certified handle with a key. This is not a marketing cost but a real investment in proven and laboratory-tested solutions. Before making a decision, check how much window replacement costs in a detached house in 2026 to plan your budget comprehensively.

Wondering about the total cost of your investment? Check our online window configurator and get an instant, no-obligation quote for your project!

What elements of an anti-burglary window should you pay attention to beyond the RC class itself?

The RC class is a certification for the entire window, but its durability is determined by several key components that must work together perfectly. When buying anti-burglary windows, you need to become a detective and check that the manufacturer hasn't skimped on any of them. Here is a list of the most important elements:

1. Perimeter hardware with mushroom cams: This is the heart of the anti-burglary system. Ordinary windows have roller locks. In RC windows, these are replaced by special mushroom-shaped pins that anchor into steel strike plates on the frame. The higher the class, the more such secure points. For RC2 class, a minimum of 7 such points is required.
2. Anti-burglary glazing (laminated): A reinforced frame alone is not enough if the glass can be easily broken. In RC2 class, P4A glass is standard, constructed from two panes of glass bonded with four layers of PVB film. Such glass cracks upon impact, but the film holds it together, preventing a quick opening.
3. Handle with a key or button: Its purpose is to lock the hardware mechanism and prevent it from being moved from the outside, e.g., with a wire or by drilling through the frame. This is a crucial element that must have the appropriate certification.
4. Steel reinforcements in profiles: PVC profiles must be equipped with suitably thick and shaped steel reinforcements with a closed section in the frame. These provide rigidity to the entire structure and prevent the frame from bending or deforming during an attempted forced entry.
5. Protection against drilling: Under the handle, there should be a special hard steel plate that protects the lock mechanism (of the handle) from being drilled from the outside.

Why correct installation is more important than the window class itself?

You can buy the most expensive RC4 class window, but if it is installed incorrectly, its real resistance to burglary will be zero. Even the best product installed with only mounting foam, without appropriate anchors or wall plugs, will be forced out of the wall in a few seconds using a simple crowbar.

Correct installation of anti-burglary windows, often called layered installation or "warm installation," must meet rigorous requirements. It uses not only foam but also special anchors or frame wall plugs, whose number and placement are strictly defined by the system manufacturer and the standard. They must be anchored to an appropriate depth in the load-bearing structure of the building. Only such an installation guarantees that the window will be able to transfer the forces acting on it during a burglary attempt. Therefore, always choose certified installation teams and demand a work completion protocol. Investing in professional installation is an investment in real security. Avoid costly mistakes and read about the most common mistakes in the installation of joinery.

SHOCKING: 7 ways window salespeople manipulate the concept of "anti-burglary"

Our analysis shows that the joinery market is full of half-truths and marketing gimmicks designed to sell a product that is only "anti-burglary" in name. We checked – here are the facts and 7 common Red Flags you must watch out for to avoid being deceived.

1. Marketing: "This is an anti-burglary window" vs. Reality: No RC certificate.
   The most common deception. The salesperson uses a general phrase, but when asked about a certificate with a specific RC class (e.g., RC2), they start to prevaricate. If a window does not have a certificate issued by a notified institute (e.g., IFT Rosenheim), it is not an anti-burglary window according to standards, but merely "a window with enhanced resistance to forced entry," which in practice means nothing.
2. Marketing: "It has reinforced hardware" vs. Reality: Only 1 or 2 mushroom cams.
   The salesperson boasts that the window has "anti-burglary hardware." In practice, this may mean that only one or two corner mushroom cams have been installed around the entire perimeter of the window, while the rest are standard rollers. This solution does not meet the standards of any RC class and gives only an illusion of security.
3. Marketing: "We provide P2 security glass as standard" vs. Reality: Glass without RC hardware is useless.
   P2 class glass (two layers of film) mainly protects against injury in case of breakage. A burglar will most often force the entire sash rather than breaking the glass. Installing even P4 glass in a window with standard hardware is pointless and a typical marketing ploy.
4. Marketing: "We offer RC2 class as standard!" vs. Reality: The offer does not include a key handle and installation.
   Some salespeople offer a seemingly attractive price for RC2 windows but "forget" to mention that the certificate is only valid with a certified handle with a key (additional cost) and specialist installation (additional cost). Ultimately, the price is much higher than it seemed.
5. Marketing: "We guarantee the lowest price on the market" vs. Reality: Savings on installation.
   A suspiciously low price for RC certified windows almost always means one thing: the contractor plans to cut corners on installation. They will use cheap foam, too few anchors (or none at all!) and employ an unqualified team. The result? Your expensive anti-burglary window could be removed from the wall in a minute.
6. Marketing: "We provide full home protection" vs. Reality: Proposing RC2 for a ground-floor house in a secluded area.
   An unethical salesperson, wanting to win on price, will propose an RC2 class knowing that it is inadequate for the level of risk (e.g., in a detached house with a terrace overlooking a forest). A professional advisor will conduct a risk analysis and recommend RC3 class, even if it means a higher price.
7. Marketing: "A handle with a key is enough" vs. Reality: A handle is only one element.
   A handle with a key alone, without appropriate perimeter hardware and mushroom cams, is worthless from an anti-burglary perspective. It's like installing an anti-burglary lock on a plywood door. It only protects against children opening the window from the inside.

Do you feel you need professional and honest advice? Avoid the traps! Order a free quote and measurement from our expert, who will accurately assess your needs and select a solution that guarantees real security.

When is it worth investing in a higher class RC4, RC5 or RC6?

Investing in RC4 and higher class windows is a decision reserved for properties with a particular level of risk or storing assets of very high value. Such windows, most often based on aluminium or steel profiles, are rarely used in typical residential construction due to their very high price and specialist requirements.

The use of RC4 class is justified for: luxurious villas and residences, currency exchange offices, jewellery shops, pharmacies, or offices where confidential data is stored. Classes RC5 and RC6 are the domain of strategic facilities, such as banks, server rooms, military facilities, or research laboratories. They protect against professional criminal groups, equipped with heavy power tools and ample time.