Re: Found Styrofoam on home's exterior?
Sounds like a typical vinyl siding install, a layer of foam is added, then the siding installed. I've never seen it applied directly to studs, it has always been over a previous siding material of some sort.
Vinyl siding, in and of itself, IS NOT a sealed surface, therefore, the way it is installed on your home means that you have massive air flow and heat transfer problems because of it. I would pull the siding, install T1-11 (plywood ) or similar siding, then reinstall the vinyl. I would also include house wrap.
As for code, not sure if there really are any when it comes to vinyl siding, as it is designed to cover up existing siding (and damage ), it isn't a "structural" component, and therefore, not regulated by the building authority to any degree.
I suffer from CDO ... Its like OCD, but in alphabetical order, LIKE IT SHOULD BE!!!