1.
recycled denim: Fabric scraps from jeans manufacturing processes form a versatile, effective insulation option. Denim insulation is non-toxic, hypoallergenic, and mold-resistant. 2.
sheep's wool: Natural fibers offer excellent thermal and acoustic insulation properties, and they're biodegradable. 3. Cork: Harvested from tree bark without harming the tree, cork provides remarkable thermal performance and dampens sound. 4. Cellulose: Made from recycled newspapers and treated for fire resistance, cellulose is an affordable, high-performance choice. 5. Hempcrete: This bio-composite material blends hemp fibers with lime, creating durable, breathable insulation.