NAIMA Grade 1 Installation 2 of 3 - Want to see what a high quality fiber glass, rock wool, or slag wool batt insulation job looks like? Watch award winning and professional insulation contractors demonstrate how to install fiber glass and rock wool batt insulation in all areas of an energy efficient home. Details such as job staging, batt cutting and sizing, installing insulation to meet R-values and building codes, and PPE recommendations are also addressed.