Home Improvement Questions? Ask a Handyman for Answers
Hello, the narrower the window, the less risk there is.... the older the building, and still with no cracks radiating from the corners or middle of the window opening, the less risk there is.
If you see cracks radiating from the corners of the window opening, or worse, from the middle of the window opening, its high risk.
Fitting a lentil stone is a fairly expensive project, over $1,000 and a risk in itself.
I think you ment lintel instead of lentil. The problem may come when you have to change the door or the windows. the new one may not be as sturdy. in the 70s, metal reinforcement was common already over doors and windows but is not often apparent if well done. It should not impact in anyway the structure but it can affect a little arc over the window or door area. I would say it is fine as it is but count that in surplus to add the next time you change the windows.
Thats good advice from Martin.