Attic Insulation Upgrade
Cumming, GA. Upgrading the layer of blown in fiberglass insulation in an attic of an older home. Halo Restorations and Remodeling was called in to add more insulation to a house that had been built in the 1980s. While there was existing blown in insulation, it has become uneven and was insufficient by today's standards. While R19 was previously considered sufficient insulation for an attic, it should be a minimum of R30 if you have a gas furnace and R38 for an electric furnace. You can determine the R value of your attics blow in insulation by the depth: an inch of fiberglass insulation has an R-value of 3.14. If you can see the top of your wood ceiling joists, you should add more insulation.
For this house the original depth of blown in insulation was approximately 6", or an R value of approximately R21. Halo Restorations and Remodeling added an additional 10" of blown in fiberglass insulation to upgrade the attic to R40. Fiberglass was chosen above the cellulose type due to the mold resistance of fiberglass over cellulose. This is an important consideration for the humid state of Georgia.