Sustainable thermal insulation for building construction focuses on materials and practices that prioritize environmental responsibility, energy efficiency, and long-term sustainability. These materials are typically made from renewable or recycled resources, have low environmental impact, and provide effective thermal resistance, reducing heating and cooling energy consumption. They prioritize safety and indoor air quality, often being non-toxic and naturally fire-resistant. Sustainable thermal insulation is durable, reducing waste, and some options are recyclable or biodegradable. Local sourcing, certifications, and government incentives support their adoption, aligning with eco-conscious and resilient building practices.