VELUX security lock (ZOZ 012K1): Enhance safety on centre-pivot roof windows

Introduction

Roof windows are excellent for natural light and ventilation, but they also represent a potential entry point if left unsecured. The VELUX ZOZ 012K1 security lock is a simple, key-operated accessory designed to make your centre-pivot roof windows more secure without affecting ventilation.

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What is the VELUX ZOZ 012K1 security lock?

The VELUX ZOZ 012K1 is a key-operated internal window lock made specifically for VELUX centre-pivot roof windows such as GGL and GGU models. When locked, it stops the window opening from the inside unless the key is used — helping protect your home from opportunistic entry.

Why consider adding a security lock?

Here are the main reasons homeowners and builders fit a security lock:

• Extra protection where standard locks fall short – enhances security over the built-in “click shut” mechanism.

• Keeps ventilation functional – you can still ventilate even when the lock is engaged.

• Ideal for high-risk or accessible windows – especially ground-floor loft conversions or properties where windows might be reached via balconies or neighbouring buildings.

Is it compatible with all VELUX windows?

Not all roof windows will accept this accessory. The ZOZ 012K1 is only compatible with centre-pivot roof windows (GGL & GGU). It does not fit top-hung models such as GPL, GPU, GHL, or GHU.

When it makes sense to use this lock

Consider installing a security lock if:

• You are installing a new roof window and want added peace of mind

• The window is easily accessible from outside

• The property is rented or regularly unattended

• There are children or vulnerable occupants at home

Conclusion

A VELUX security lock like the ZOZ 012K1 is a small upgrade with a big impact, especially for roof windows that don’t include advanced anti-burglary features. It’s easy to fit, compatible with key centre-pivot models, and keeps your home safer without compromising airflow

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