Understanding Cellulose Insulation
Cellulose insulation offers eco-friendly thermal protection with specific installation requirements.
- R-Value Performance R-3.6 to 3.8 per inch. Settled density: 2.2-3.0 lbs/ft³. Loose fill: 1.5-2.0 lbs/ft³. Higher density increases R-value by 10-15%.
- Coverage Calculations 30 lb bag covers 40 ft² at R-38. Settlement reduces thickness 20%. Add 15% for irregular spaces. Account for framing factor (15% reduction).
- Installation Methods Dense-pack: 3.5 lbs/ft³ for walls. Loose-fill: 1.5 lbs/ft³ for attics. Wet-spray: add 40% moisture content. Stabilized: 20% adhesive mix.
- Material Properties Fire rating: Class 1. Sound reduction: STC 44-68. Moisture content: 8-12% optimal. Vapor permeability: 5-10 perms at 3.5" thickness.
Installation Guide
Equipment Needs
Blowing machine: 2.5-3.0 HP minimum. 150ft hose maximum. Vacuum for cleanup. Coverage charts required. Depth markers every 100 sq.ft.
Safety Measures
Respirator rated for cellulose dust. Cover electrical fixtures. Maintain 3" clearance from heat sources. Verify attic ventilation (1:300 ratio).
Cost Factors
Material: $0.60-1.20/sq.ft at R-38. Labor: $0.80-1.50/sq.ft. Equipment rental: $80-120/day. Air sealing adds $0.50-1.00/sq.ft.
Energy Benefits
30-40% heating/cooling savings. Payback period: 2-4 years. Reduces air infiltration by 30%. Carbon footprint: 0.07 kg CO2/sq.ft installed.