Picture this: you’re standing on the porch, the wind whistles through the gap where the old door threshold used to be, and a cold draft sneaks straight onto the floorboards. That moment of frustration is the exact spot where a simple replacement can turn a house from “meh” to “wow” in an afternoon.   First, let’s admit the truth – most of us ignore that little strip of wood or metal because it’s out of sight until the weather decides to make it the star of the show. But a com