Burglary-resistant windows - RC1-RC3 resistance classes and what they actually protect

Burglary Resistance Classes (RC) define how long a reasonably well-equipped burglar needs to force a window open using typical tools. This isn't a marketing label - it's a specific, standardised European norm (EN 1627) that can be verified on a product's certificate.

What separates RC1, RC2 and RC3

RC1 N - the basic level, protecting mainly against forced-entry-by-brute-force attacks (prying without tools). This is the standard on windows with no additional security features.

RC2 - the class most commonly chosen for residential buildings. The window must withstand a break-in attempt using simple tools (screwdriver, crowbar, wedge) for at least 3 minutes. That's a real threshold that discourages most opportunistic burglars - statistically, they target easier options.

RC3 - higher resistance, withstanding an attempt with additional tools (e.g. a larger crowbar) for at least 5 minutes. Used mainly on ground floors of single-family homes, commercial premises, or wherever break-in risk is higher.

What's physically different about an RC2 window

• Reinforced perimeter hardware - more locking points spaced evenly around the sash, often with mushroom-head cams that are harder to pry open than standard catches.
• Reinforced glass - usually P4A-rated glass (with a security film inside the glazing unit) that doesn't shatter into sharp shards and makes punching a hole through it much slower.
• Reinforced hinges - with extra protection against prying from the hinge side, not just the handle side.
• Lockable handle - prevents the window being opened from outside even after a small hole is punched in the glass and someone reaches for the handle.

Does RC2 really deter burglars?

Police statistics from many EU countries show most single-family home burglaries are opportunistic - the offender looks for the weakest, fastest point of entry. A window that resists for more than 2-3 minutes tends to make most burglars give up, since the risk of being noticed grows. RC2 isn't a 100% guarantee, but it genuinely raises the difficulty at the point where break-ins are most often attempted - ground-floor windows facing a garden or backyard.

Where a higher RC class is worth investing in

• Ground-floor windows and any easily accessible from outside (balcony, terrace, garage)
• Homes that are secluded or empty for periods of time (see also our article on holiday-home windows)
• Upper-floor windows, if there's easy access nearby - garage roof, gazebo, a tree

Upper-floor windows with no easy outside access usually don't need a higher RC class - there, the priority is other parameters, like thermal insulation.

Does a higher RC class significantly raise the price?

The extra cost of RC2-rated hardware on a typical residential window is usually a few percent to just over ten percent of the window's own price - far less than the cost of damage from an actual break-in, or a rise in your insurance premium after a claim. Many insurers also offer policy discounts for confirmed anti-burglary features.

Want to check which of our systems offer RC2-class hardware, and what it costs for your dimensions? Ask for a quote - we'll advise where in your home a higher resistance class is genuinely worth it.