If your home is in need of a facelift, try tuckpointing
What will happen is that a contractor to will come to your home
, and scrape away about 1/4 inch of the mortar that has been affected by the cracks. They will then push in new mortar into the new space. It will fill the cracks and strengthen the entire wall. Technically, lintel replacement is a little different. Lintels are the pieces on top of the window or door frame, usually made out of a flat piece of metal. They will corrode and ware over the years. And the simplest way to deal with them is to replace them. This will help keep the house sealed against cold wind and keep the inside at an even temperature. If this problem is ignored, the lintels can pull away from the wall and begin more cracking there. The lintel should be inspected and replaced a great deal more frequently than the mortar. Sometimes, a house can go for decades without needing tuckpointing. Lintels have to be maintained on a tighter schedule.
If your home is in need of a facelift, try tuckpointing