Basement Renovation - Adding Insulation - Minneapolis, MN

[Josh Cook]

What kind of rigid insulation is required when insulation the exterior walls of a basement in St. Louis Park, MN to meet building code? 

Thanks!

[John Woodrich]

It is common for people to use 1.5-2" closed cell foam insulation.  These come in rigid sheets and you have to tape the seams.  This acts as a good vapor barrier at the same time.  Spray foam is an option but more costly.

I assume you are pulling permits - I would just call the building official and either A) tell him your plans or B) ask what he recommends.  Many people don't like the inspectors/officials but they are good for free advice :)