Home Inspection Question

[Hector Lewis]

Hello,

I am currently conducting due diligence on a triplex I might purchase.  One of the callouts was this "14-81(2) Interior Structure.  The building system is improperly installed or missing in particular rooms or throughout the structure.  Repair the entire building system in accordance with the Michigan Building or Residential Code."

I have not heard of a building system before when going through this process previously with other properties.  I am not sure if this is a big or not.  If someone could provide some insight that would be great.

Thanks,

Hector