Ryan,If you can fix your moisture problem with the above mentioned sealants, I think your best bet is to patch the spall in the bottom face of the slab with concrete and then provide some sort of strapping system (steel/carbon fiber) in the short direction of the porch on either side of it.  

But yes when we notified the property owner ya all communication stopped but i do have carbon copies of checks payed out to him plus materials we've bought per our contract.

I love the Back Bay area, sometimes I ride my  carbon fiber road bike through there.

With HVAC, there isn't much risk to the technician, but an improperly installed gas furnace can leak carbon monoxide, which can kill an entire family while they sleep.If there's a chance of the contractor getting hurt -- and more importantly, if there's a chance of a homeowner or tenant getting hurt -- I want to be as free as possible from the liability of hiring an unlicensed contractor and as confident as possible that if there is a lawsuit, the contractor has insurance to protect himself and me. 

Quote from @John Carbone: Does proper tend to increase premiums a lot on renewals (assuming no claims)?

We also had to do some carbon fiber strapping as our foundation was bowing inward as well.  

This is trapping carbon monoxide in the vent and potentially getting into the house.  

My @$$ left almost 3 years ago...Also, we have NO 9% plus income tax, and all the other commie taxes your legislature imposes, gas, air, carbon, plastic bag, cow farts, etc, as well as giving every dime you give to them in taxes to SJW programs, I hope you enjoy writing your actual property tax checks next year.

Looking for basic items such as smoke and carbon monoxide  detectors operable, broken windows and operable, holes in drywall or plaster, peeling paint, mold or other hazardous items. 

Hi @John Carbone - The homeowner will typically have insurance through Proper Insurance.