How to fix sliding screen door popping off?

snipwhip

Hi all, my sliding aluminium screen door keeps popping off the bottom rail when I slide it open too enthusiastically or when I try to lock it. I think there's two reasons for this. Firstly the glass/screen door frame setup looks to be sagging ever so slightly in the middle of the outside section and when I try to lock it, it pulls the screen door up a little to align to the frame and the roller then pops off the track. Secondly, the bottom rollers are also cracked and unadjustable with a screw driver as the door is probably 20 years old.

What can I do to fix this problem in the most cost effective way? Would getting new rollers on the bottom of the door and lowering them would stop the problem? Or does the sag necessarily need to be addressed?

Also, do you know what rollers these are and how I would replace them? They are all riveted with an adjustment hole on the side face of the door but I otherwise see no other fixing.

Thanks

Snipwhip

MitchellMc

Hi @snipwhip,

Replacing the roller carriages and adjusting the rollers correctly would be my first step. Given that the existing rollers are cracked and no longer adjustable, there's a good chance this will resolve the issue.

Once the new rollers are installed, you can adjust them to ensure the door sits squarely on the track and lines up correctly with the lock. If you run out of adjustment and the door is still being lifted off the track when locking it, then I'd look at addressing the sag in the frame.

As for identifying the rollers, you'll likely need to remove one of the existing carriages so we can get a better look at its shape and dimensions. If you can post a few photos of the cartridge once removed, we can see whether a suitable replacement cartridge or roller is available.

Please let me know if you have any questions.

Mitchell