Hi dgold. Yes we looked into expanding foam but from what Dana said about the house needing to breathe, we thought the blown-in cellulose would allow better air circulation and better mold and mildew prevention. Am hoping Dana will chime in here sometime with more of his expert advice. We are now perplexed and back to square one. The project's on hold for now and thank goodness the winter's over... Cheers, Rug.