HempWool R20 Hemp Insulation is a high-performance, eco-friendly insulation made from 90% hemp fiber and 10% polymer fiber. It delivers solid thermal performance with a smaller environmental footprint—no drama, just warm, comfortable spaces.

Key Features & Design

• Pack Size: 256 Sq Ft per pallet
• Composition: 90% natural hemp fiber and 10% polymer fiber
• Density: 2.81 lbs/ft³ (45 Kg/m³)
• Thermal Conductivity: 0.040 W/m.K
• Thermal Resistance (R-value): R-value of 3.7 per inch; Thermal Resistance: R3.69/inch
• Vapor Permeability: 0.647 Perms (37 ng/Pa.s.m²)
• Ignition Time: 6.67 seconds; treated with biobased, non-toxic fire retardants for increased safety
• Heat and Smoke Release Rates: Low
• Environmental Benefits: USDA Certified Biobased Material with 89.9% organic carbon content. Free from VOCs and Red List Chemicals. An Environmental Product Declaration is forthcoming in 2023.
• Hygrothermal Behavior: Maintains efficiency despite moisture
• Phase Shift Regulation: Provides up to 10 hours of heat retention for 7.5 inches of insulation
• Dimensional Stability: High mechanical strength prevents sagging or settling post-installation
• Applications: Exterior walls, floors, ceilings, and more, offering improved air quality and acoustic comfort. Ideal for eco-conscious construction projects seeking sustainable, high-performance materials
• Installation & Safety: Friction fit between wooden or steel frames. Safe to handle, though wearing a dust mask and eye protection is recommended during installation. Panels are shrink-wrapped with compostable plastic film for safe delivery and storage
• Certifications & Standards: ASTM C209, E96, C518, E1354. Currently under evaluation for ICC-ES International Code Compliance (2023)