Direct answer
Properly installed foam improves humidity control by sealing air leaks. Improper application (especially mixing closed-cell and open-cell incorrectly, or sealing without ventilation) can cause issues. Partner-network installers design every project with the home’s ventilation strategy in mind.
Authoritative sources
DOE Energy Saver guide to insulation types, R-values, and recommended applications.
Energy Efficient Home Improvement Credit, up to $1,200/yr for qualifying insulation work.
Energy Star recommendations for attic and wall insulation R-values by climate zone.
Related questions
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