Attic Insulation : Terms refers to insulation put in the attic. This is usually either batt insulation or blown insulation. The thickness will vary depending on the “R” value that is specified in the plans
Complete Design, Inc. (Construction Design Specialists), Dictionary of Construction Terminology, Washington, USA 2015. http://completedesign.cc/client-resources/dictiona ry-of-construction-terminology, (Const - Amer) {836}