Pitched roof insulation between rafters involves installing insulation materials to enhance thermal performance. Batt insulation is installed snugly between rafters, while loose-fill insulation is poured into the attic space. Spray foam insulation is applied using specialized equipment. A vapor barrier is crucial to prevent moisture penetration and condensation. Proper insulation thickness and density are essential. Furthermore, sealing air leaks is vital for optimal insulation effectiveness. Essential components include an insulation stapler, knife, and vapor barrier tape. Rafter joists support insulation, roofing underlayment protects it from moisture, and shingles complete the roofing system.