The most effective method for applying cellulose insulation in an attic is by using a

• A. hand broom
• B. blowing machine
• C. spray gun
• D. spray foam kit

Answer: (B)

Applying loose-fill cellulose insulation in an attic works best with a blowing machine because it can feed the material through a hose and distribute it evenly throughout the space. This method lets you reach tight corners, fill around obstacles, and control the depth and density so the insulation layers smoothly without gaps or voids. Achieving the right density is crucial to prevent settling and to maintain the intended R-value, which is hard to guarantee with manual methods. A hand broom can’t spread the material evenly over large, irregular attic areas and is far too slow. A spray gun isn’t suited for loose-fill cellulose and won’t provide the uniform coverage or the density needed. A spray foam kit is designed for foam insulation, not loose-fill cellulose, so it wouldn’t deliver proper distribution or performance.