Easy fixes for a saggy door

One solution involves using stouter fasteners, the other shims

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Q: Our front door faces the southwest and has a short overhang such that it takes a beating from the afternoon sun. We replaced our 36-by-80-inch wood-panel front door with a new fiberglass one.

It has settled over the past 15 months. Also, it’s sagging a bit. The old wood door sagged because of the many separate pieces that sagged. The new fiberglass door has a solid one-piece face, but the top corner is sagging just a bit so that it rubs against the jamb.