Locksmithing and Security

I spent 20 minutes yesterday trying to figure out why on earth a sliding patio door wouldn’t lock in the closed position yet operated perfectly well in the open position. Well of course, we go through this half-a-dozen times a week at spring time and winter time: the door heats up or cools down and the bolts, etc. no longer want to enter their keeps.

However, I’d tried every keep and they were all in the perfect position. So I tried it one more time and this time I stood outside. The handle had been fitted 90 degrees out and was fouling the frame. Doh!