I have an older house (circa 1919) that was built without a basement (just a crawl space). About 1965 a basement was added.
Along one of the old concrete foundation walls there is a 7 foot section that has nothing under the bottom of the wall! (See image below.) In the last 10 years 2 pieces of the wall have cracked off the bottom . The pieces weigh maybe 150 lbs and 50 lbs. This concrete wall is only about 2 feet in height (the bottom is maybe 20 inches below ground level).
It seems to me that this wall is at risk of falling in completely. I realize I could call in a professional to fix it ($$$). But would like to at least consider any options I may have to fix this myself. I am an avid do-it-yourselfer and in 25 years have only ever hired a contracter one time (to replace my steep roof).
Anyone have any good ideas about how to fix this problem? Extra points if your suggestion is work I could do myself. :-)
EDIT: My diagram may give the wrong impression about one point: the old foundation wall is unsupported for a 7 foot section only. But somehow it is still hanging in place. The rest of the wall does have dirt under it holding up.