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VELUX ZOZ 010K Opening Restrictor with Key - Only For GGL/GGU Windows

Product Code:
ZOZ 010KC S011
Est. Delivery: 5-7 Working Days
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£53.03 Incl. VAT
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When you need to restrict a roof window for safety reasons (ie for young children), then take the proper precautions and fit a VELUX opening restrictor. The special key (ZOZ 011) allows you to release the window for cleaning, and with the restrictor in place the window is still capable of being opened to provide additional ventilation.

Please note that the opening restrictor can't be used on VELUX Top-Hung windows, GPL, GPU, GHL and GHU.
To check what type of VELUX roof window you have, you need to have a look at the type sign of the window by opening the sash and have a look at the ventilation flap.


  • Opening restrictor and key for GGL/GGU Centre-Pivot Roof Windows only.
  • Regulate the extent to which your VELUX Rod Window opens with this easy-to-fit safety catch.

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Questions & Answers


Is this product a original velux product?


Yes this is a Velux product, it would even be dispatched direct from their warehouse to you if ordered.

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3 / 5 1 reviews
IoW Sue
13th September 2021
Not as easy to fit as implied, Velux should actually provide this installed if required. You need at least 2 strong people to add this lock. Fortunately we managed to get help as I really was not strong enough to lift it up to reinstall as it is very heavy. Now to hope this stops one 9 year old boy from thinking he can climb onto a chair to open the window and throw things out of it . . . Boys . . . Roofing Superstore are a brilliant organisation, Velux product is not under their control!!
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