Originally Posted by QCCowboy
Thought I would post another one here. The slam latches are pretty easy to bypass, and while I'm not as worried about protecting what is in there, I did have a problem where I could darn near open a basement door because of the gap between the door and the latch catch. Simple solution, put an o-ring underneath (both seals and rises the catch). Problem solved. Not sure if anyone else will have this issue, but it cost me somewhere in the neighborhood of $.50/latch).
I know this is a really old post but I had this same problem with one of my basement doors being able to be pulled open even when locked. I tried the o-ring fix and it didn't help.
What I finally did was take a square latch plate from a regular door, drilled some holes in it so I could line it up with the existing screws, and put it right on top the existing latch catches. It works perfect.
I didn't take any pics, but the latch plate looks something like this:
The one I used was a little longer and had more room past the existing holes.