Now for something completely different….after shelling out for one of these awesome microchip cat doors to be installed I thought I’d DIY the opening in my security mesh door. – As the weather warms up hopefully I’ll get more DIY stuff up here.

Mark the bars you'll need to cut to get make a square just a little bigger than the cat door opening

Cut where you marked using some hefty bolt cutters - a good excuse to buy tools, it would cost more to get a guy out to do the job, right? For now only cut the bars not the screen.

Make up 2 "picture frames" using mitre saw. The inner dimension should be about the same size as the cat door opening or just slightly bigger. I glued and tacked mine together with small nails.

Put the screws into the drilled frame and push through the mesh screen to hold it in place. Cut out the mesh, and put some dabs of glue to hold the mesh
Nice handyman job! Thanks for sharing.
BTW, where did you get that security mesh door? Thanks.
Cheers Warren, thanks for your comment. The security door was already here when we bought the place but this kind of door is very common here in New Zealand.