Concrete foundation crumbled

I have a Queenslander - 1 story with garade underneath, built on foundational concrete pillars.
The concrete is crumbling away at base (pics attached), and I wonder what repair is needed.
Separately, there is a freestanding concrete wall that has a big crack and may fall over.

I have a quote from a handyman with concrete experience for $660 (which includes fixing both issues). His suggestion:
- For the foundation would include removing defected concrete, cleaning and treating the steel to remove and prevent rust and reapplication of concrete.
- For the wall would be to cut straight along the repair, remove the concrete and reapplication of concrete.

I think that should do it for the wall, but any advice on whether that fix is enough for the pillars? Would it require any stumping?

 

You have concrete cancer in the stumps. Requires restumping.

 

Any idea how much that would cost? A quick search on the Internet says it may cost ~10k - 25k?

 

I would go get it checked out properly (structural engineer?)and not by a handyman. Does your insurance specifically not cover it?

 

I'm not sure about insurance -- thought they typically cover natural events, while this seems like a problem with old properties. Will give them a call.

 

Your PDS is your best friend.

This is what I found on the net:
What is specifically covered differs from one insurer to another. Most policies, however, don’t cover events that were either avoidable or preventable like:

• Pre-existing damage
• Faulty construction
• Periodical wear and tear
• Shifting soil
• Damage caused by tree roots
• Damage caused by termites
• Damage caused due to negligence or illegal activities

Insurers often believe you should’ve noticed them or you could’ve prevented them from escalating during the early stages. Due to this belief that any damage caused by these events could’ve been prevented, insurers are unlikely to include them in your policy cover.

It does look like it could be from one of the above? All the best!

 

I thought that wall looked familiar....
Is this considered a safety issue and required a builder [QLD]

The wall is apparently non structural
So I'm not sure why you just wouldn't remove it

 

It must be pretty stable, it hasn't moved in 9 months.

 

Hahaha oh what, this was posted before?
What about the pillar, surely structural? Cleaning steel and re-concreting seems to be just putting a plaster on a bullet wound.

 

Yeah, that wall has always been like that as I did not want to do anything with it yet.
This post was more about the stump, thanks to everyone for your input!

 

IMO (based on the limited info available) concrete spalling of the stumps is probably fixable provided that:

• Not much thickness loss has occured to the actual steel reinforcement yet
  
• All loose concrete is removed back to the point that all rusted reinforcement is exposed so it can be treated
  
• Reinforcement is preppped to remove any lose rust product prior to coating with a corrosion inhibitor
• A specialist structural concrete repair mortar is used to replace the concrete to ensure a good bond is achieved, not just normal concrete or mortar.

If however the corroded reinforcement has lost considerable thickness, then you'd need to replace the stump entirely.

 

Insurance doesnt cover maintenance issues. A natural event may be a earthquake, a impact to the house by a meteor etc. Lightning hits a tree which falls on the house causing it to move on stumps etc. It requires a insured event. Not mere passing of time