Ed writes from Pittsburgh, Pennsylvania: “My attic is 2×4 trusses with R30 insulation. Any suggestions on how to install 7/16 osb sheets which will serve as flooring for some needed storage?
Unfortunately, I have no suggestions on how to install OSB board over the R-30 insulation since you would end up compressing it. If you were to compress the insulation down to a 2 x 4 cavity you would end up with roughly an R-15. We tend to think attic storage space is “free,” but if it prevents us from maintaining the recommended amount of insulation there is definitely a cost for that storage in higher utility bills and CO2 emissions.