How to Fix Thin Spots in Loose-Fill Attic Insulation
In attics, loose-fill insulation can settle and shift causing gaps, or holes, in the insulation seal. Fix holes in loose-fill insulation to ensure a well-sealed attic and to conserve energy. Whenever you work with any type of insulation, protect yourself by wearing long sleeves and pants, full goggles, gloves, and a respirator.
Check for thin spots.
You might notice places where the insulation is thin.
Smooth out uneven insulation by using a plastic or plywood rake.
With electrical wires present in the attic, it would not be wise to use a metal rake.
Keep attic insulation clear of light fixtures. Insulation near light boxes can overheat and catch fire. Also don’t cover the attic vents. If the attic can't breathe, trapped air can turn the best insulated home into a sweatbox on a hot summer day. (Not to mention that a build-up of humidity can occur, which will result in wood rot, mildew, mold, and fungus growth over time.)
In moderate climates, R-38 insulation is required. In extreme climates, R-60 makes is necessary. You may not have the right insulation to meet new requirements. Check with the building department in your area to determine the correct R-value for your home.