The problem here is one most old-building carpenters know well: a solid wood entry door around a century old, sitting in downtown Seattle, with a bottom rail gone soft and the veneer on the faces decayed past saving. Left alone, that rot only climbs, so the maker took the door down and rebuilt the lower end properly rather than patching over it.
The way it came apart and went back together is the part I find most satisfying. A chisel, a pry bar, and a circular saw run against a straight edge stripped out the rotted material. Fresh timber was milled and thicknessed for the new bottom rail, a tongue was cut into it, and a matching groove was routed into the lower edge of the door with a clamped wooden guide. Construction adhesive plus three-inch exterior screws into pre-drilled holes hold it, and the counterbored holes were plugged with dowels and sanded flush. That is a tidy joint on a door that has to take weather and foot traffic.
The surface work shows patience too. Bondo filled the decayed voids and was sanded smooth, new veneer panels went over the faces with glue and brads, and paintable caulk handled the seams, molding profiles, and nail dents. The original metal mail slot was reused with an interior blocking block behind it, which keeps the character intact. Kilz exterior primer under a dark brown topcoat matched the old finish, and the door went back into the entryway after a temporary construction door came out.
One open question remains: why the door was ever laminated in the first place. The maker suspects it followed earlier repairs, judging from sloppy joinery visible through the mail slot hole, but nobody knows for sure.
Project by timbercomb. Watch it on their YouTube channel: