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Because Yahoo seems to think so on just about every answer I type...

I have a heavy (solid) wood door between my house and garage. I took it off the hinges to install a door sweep to the bottom to block a 3/8" gap at the bottom where cold air was coming in, and when I put it back, it swings freely for the first foot or so and then the handle side begins to hang up on the concrete floor, getting worse as you open it. When I close it, I notice that along the top edge there is a bigger gap (though still hits the stop) between the top of the door and the jamb on the handle side than the hinge side. In other words, it looks like the door is sagging a little towards the handle side; I don't believe that the floor rises. How do I pull the handle side up a little? Do I mortise the top (and other?) hinge a little deeper, and if so, do I do it on the door or the frame? My instinct is on the door, since that will pull it up regardless of whether the door is open or closed, and a deeper mortise on the frame would on do so when the door is closed, if that makes sense. Thanks.