What would the R value be if I used the blown in Celbar Cellulose insulation?
The Celbar Celulose has an R value of 3.6 per inch so that would be an R value of 12.6. You may also be interested in Reflectix and Dennyfoil Both of these function as a vopor barrier and add some R Value. I used the Reflectix on a addition I just finished and feel like it was well worth the investment.