Introduction

HempWool R28 Hemp Insulation is a revolutionary, eco-friendly insulation material crafted from a 90% natural hemp fiber and 10% polymer fiber blend. With a standard R-value of 3.7 per inch, it competes with traditional insulation for thermal resistance while delivering clear environmental benefits. Ships as 192 Sq Ft/Pallet and available in all sizes.

Key Features & Design

• Composition: 90% natural hemp fiber and 10% polymer fiber
• Density: 2.81 lbs/ft³ (45Kg/m³)
• Thermal Conductivity: 0.040W/m.K
• Thermal Resistance: R3.69/inch
• Vapor Permeability: 0.647 Perms (37ng/Pa.s.m²)
• Ignition Time: 6.67 sec, treated with biobased, non-toxic fire retardants for increased safety
• Heat & Smoke Release Rates: Low
• Environmental Benefits: USDA Certified Biobased Material with 89.9% organic carbon content; free from VOCs and Red List Chemicals, contributing to greenhouse gas reductions
• Environmental Product Declaration: An Environmental Product Declaration is forthcoming in 2023
• Hygrothermal Behavior: Maintains efficiency despite moisture, offering a competitive advantage over inorganic fibers
• Phase Shift Regulation: 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; ideal for eco-conscious construction seeking high-performance materials
• Installation & Safety: Designed for easy friction fit between wooden or steel frames; safe to handle, though dust masks and eye protection are recommended during installation
• Delivery & Storage: 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)