Spray Insulation in Humid Areas

I've heard that there are concerns regarding using spray insulation in high humidity areas such as Houston. And this is for a 3 story townhouse....two units together. We heard that the house needs to 'breathe' and spray could cause problems. What concerns are there regarding this and how should such a house with spray foam be managed? Thanks

Answers:

From: terry

any info on installing cocoon insulation in verticle walls?

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