Retrofitting Window Fittings (RC2) – Why Existing Windows Can Be a Security Risk

Many existing windows in office buildings, workshops, or public facilities no longer meet today's security standards. Especially windows without RC2 fittings make it easy for burglars – a huge risk for commercial properties with high-quality equipment or sensitive data.

In this guide, we show you how to effectively retrofit your existing windows with RC2 window fittings, what requirements DIN EN 1627 sets, and what B2B customers need to consider when selecting products and installation.

Security starts at the window – and can be specifically retrofitted. Read on to find out how to effectively protect your commercial properties.

What does RC2 actually mean?

RC2 stands for "Resistance Class 2" according to DIN EN 1627. Windows and doors of this class offer at least three minutes of resistance against burglary attempts with simple tools such as screwdrivers, pliers, or wedges. For many commercial areas, RC2 is a standard requirement today, especially with insurance companies or security-relevant industries.

Risks of outdated window fittings in stock

Burglaries often occur through inadequately secured windows. Old window fittings offer no protection against levering. Especially in existing buildings without regular modernizations, outdated locking mechanisms are a security leak.

The following weaknesses occur particularly frequently:

• Windows without mushroom head locking
• No continuous closure monitoring
• Outdated materials (aluminum, soft plastic instead of steel)

Advantages of retrofitting with RC2 window fittings

Retrofitting is in most cases more cost-effective than a complete window replacement. With certified RC2 window fittings, you create:

• Increased burglary protection for existing windows
• Higher insurance security through DIN-compliant retrofitting
• Longer lifespan of existing windows through upgrading

Especially in industrial halls, schools, or office buildings, retrofitting is economically and security-wise sensible.

Which products are suitable for retrofitting?

In our online shop tooler.eu/en, you will find numerous solutions for window security. Particularly popular in the B2B sector are retrofit kits with:

• Mushroom head pins and security locking pieces
• RC2-compliant handles with locking function
• Burglar-resistant locking strips

You can go directly to the category with tested multi-point locks here.

Recommended brands for RC2 window fittings

When selecting your products, you should pay attention to quality and certification. Our top recommendations:

• Gretsch-Unitas – Specialist in window technology and RC2 systems
• KFV – Strong security solutions for the window and door sector

Both brands stand for tested quality, durability, and easy retrofitting.

Tips for installation and implementation

When retrofitting, you should pay attention to these points:

• Professional installation by specialist companies or trained janitorial services
• Installation of certified RC2 fittings only
• Don't forget documentation for insurance purposes

Another tip: Combine mechanical retrofitting with digital window monitoring (e.g., opening sensors).

Frequently asked questions about RC2 retrofitting

Can I also install RC2 fittings myself?

Technically skilled individuals can install some systems themselves. However, for full certification, professional installation is recommended.

How do I recognize RC2-compliant products?

Look for the DIN EN 1627 marking and tested brands like Gretsch-Unitas or KFV.

Are there funding opportunities?

For privately used buildings, there are sometimes KfW funding programs. In the commercial sector, it is worth consulting with the building insurance.

Window security doesn't have to be a major project – with RC2 fittings, retrofitting becomes a practical solution.

Visit our shop now and discover tested window fittings for your project: Multi-point locks at Tooler.de