Insulation, Radiant and Vapor Barriers - Insulation during (re)siding job

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mtujohn
01-29-06, 09:03 PM
I am preparing to side my masonite sided 1970's house in the Northeast.

Assuming it makes total sense to add insulation, what do I get the most bang for my buck - cheaper styrofoam or more expensive foam sheets?

Is Tyvek and Tyvek joint tape or some other wrap worth the cost and effort?

I also am assuming exterior walls have signficant insulation but can blow in more if that makes sense.