Why Sliding Window Locks Fail on Aluminum Frames
The Lock Is Only the Last Link in the Security Chain Most sliding window locks do not fail because the lock body is too weak. On failed windows, the lock is often still intact. The real damage is usually around it: elongated screw holes, a keeper that no longer lines up, a pitted aluminum stile, a sash that can be lifted clear of the track, or a frame wall that has bowed under load. ...