treated plywood foundation perimter & parging

[Tim Lee]

I have a house that I'm working on that has an addition on a pier foundation. I'm trying to come up with a way to seal in the foundation perimeter, similar to manufactured housing skirting. I'm trying to find out if you can frame in between the piers with treated lumber, covered with treated plywood, add lathing, and then parge the addition and the rest of the house to blend in. I'm trying to find a quality solution to avoid having to pour a footer and install concrete block to seal the perimeter. Ideas? Will the wood and parging solution meet code? Thanks