How to cut cavity frame?

[hardly_handy]

Hi all, long time lurker, first time poster.

I am currently looking to replace my current externally mounted sliding door in our bathroom with an internal/cavity/pocket slider version. The door gap/opening is a standard 820x2040ish size. A friend has gifted me a 2340 cavity frame which was a left over from their renovations is it ok for me to cut down the 2340 frame so it works for my current 2040 door/cutout? any suggestions on whether top or bottom is better to cut or anything I need to be wary of when doing this? or is it a no-go and if I want to use the frame I need to keep the 2340 opening?

Appreciate any assistance. It's my first try at this type of thing!

[Akanksha]

Welcome to the Bunnings Workshop community, @hardly_handy. We're delighted to have you join our community of like-minded D.I.Y. enthusiasts who are sharing creative projects and exchanging useful advice with each other everyday. 

Thank you for your question. Kudos to you for attempting something new! I'm sure our resident Bunnings D.I.Y. expert @EricL and knowledgeable members like @Jewelleryrescue and @TedBear will be happy to provide some suggestions.

While waiting, can I please request you to upload any photos of your current door and any additional photos that can help our members get a better idea of what you're working with? This will enable them to provide more tailored advice suited to your needs.

Let me know if you need a hand in posting photos. 

Akanksha

[EricL]

Hi @hardly_handy 

My apologies for the late reply. From a building point of view, it would be easier to modify the frame rather rather than modify the entire wall to accommodate the cavity sliding frame. 

Before you begin, I strongly suggest having a look at this discussion - Installing a Hume cavity sliding flush door by @moussaqhiands. It will give you a very good idea in what is involved in installing a cavity sliding door. 

If you have the proper tools along with experience in carpentry, installing a cavity sliding door frame should be possible.  

If you have any other questions we can help with, please let us know.

Eric