I had considered this. Maybe a steel box frame inside for support.
Hugo Morvan wrote:You could also have a metal i beam on the sealing with studs and build pillars under it for support.
Thankfully I'll have a brother-in-law and nephew nearby who are both pretty knowledgeable.
Hugo Morvan wrote:I haven't seen it from upclose, so can't really say if it's safe. I take it it's not in danger of immediate collapse. Ask a professional.
Sounds like solid advice. Thanks! One downside of the old home place is tight clay soil with a high shrink–swell capacity. Over time it can beat up underground structures pretty viscously. This is probably a 1940s era structure. There are also two remaining underground cisterns that I need to check to see if they will hold water.
Where i to fix it i'd seal the cracks with a cement/sand mix, first from the inside, so make it thick and sticky. Wait for it to harden and fill it from above with a sloppy mix. Push it in with a small stick.Fill it completely. Wait a day for it to harden. That will keep the water from coming in and worsening the problem. Then phase 2 bang the loose render of the wall with a hammer and render the walls. Phase 3 lock on the door so kids can't come in. Phase 4 keep a close eye on the repaired bits, if cracks don't open i wouldn't worry too much about it being unstable.
If you're unfamiliar with what i'm saying call in a expert to do the job.
I'd put this as phase 1. It sort of goes with the First Aid mentality of ensuring no further hazards or danger before starting.
Phase 3 lock on the door so kids can't come in.