Do You Want Ants? Because That’s How You Get Ants
For those that don’t know what’s going on here, that gap between the concrete foundation and the window frame isn’t supposed to be there. They were originally fastened together because, well, nobody wants holes in their home. There’s no quicker way to get ants than to provide them with a gaping hole to enter through.
So, what happened here? According to the OP, natural disasters may have caused the foundation to sink. It got so bad that the adhesive between the window frame and concrete foundation completely separated. How do you fix such a problem? Either hit the roof with a hammer so that it sinks to the ground or raise the Earth by a few centimeters.