ᐅ Retrofitting a mushroom-head lock

Hello,

Our nearly 10-year-old double-glazed wooden windows with fittings from Roto have locking parts that are partly mushroom cams and partly standard cylindrical bolts. The strike plates in the frame appear to be designed for mushroom cams throughout.

Is it possible to simply replace the standard cylindrical bolts with mushroom cams, or would the entire hardware need to be replaced? I have not seen mushroom cams available as individual parts anywhere.

If this is a straightforward modification, I would consider it to improve burglary resistance. I understand that the rest of the house must be compatible, and I plan to seek advice from the police if possible.

Best regards,
Michael

Hello Michael,

You need to replace individual hardware components. Depending on the window size, this could be around 7-10 parts that are assembled together to form the complete hardware system. You can either replace all parts or only specific components (e.g., restrictor arm, corner drive, gearbox...). It is not possible to simply replace the standard locking pins with mushroom cams.

Regards,
Peter

Thank you, Peter,

that helps me a lot. Sounds like a bigger effort.

Regards,
Michael

It’s quite manageable. All parts can be unscrewed without much effort and the new ones screwed on. What’s really important here is to buy the right fittings for the window. Having more mushroom cams doesn’t really matter from an insurance perspective, so floor-to-ceiling windows (such as patio doors) and windows where entry is well protected definitely make the most sense. No one is going to break in through a small bathroom window that is clearly visible from the street.