Sustainable insulation in building construction prioritizes materials and practices that are environmentally responsible and energy-efficient. These insulation options are often made from renewable, recycled, or low-impact resources, have a low embodied energy, and provide effective thermal resistance, reducing energy consumption. They promote indoor air quality by being non-toxic and safe, with some materials being naturally fire-resistant. Sustainable insulation is also known for its durability and longevity, reducing waste, and some options are recyclable or biodegradable. Certain materials, like wool, even sequester carbon. Local sourcing, certifications, and government incentives further support the sustainability of these insulation choices. Ultimately, sustainable insulation contributes to more eco-conscious and resilient building projects.