When it comes to ensuring the use of sustainable building materials, the first step is to define what sustainability means for your project and what criteria you will use to evaluate your options. Depending on the context, budget, and objectives, you may want to consider factors such as the life cycle of the materials, their embodied energy and carbon emissions, durability, adaptability, recyclability, health and safety impacts, and aesthetic and cultural value. This will help you establish a clear and consistent framework for selecting and comparing sustainable building materials. Additionally, consider the sourcing, processing, transportation, installation, maintenance, and disposal of the materials. Moreover, look into how they affect indoor and outdoor air quality, as well as the comfort and well-being of occupants. Furthermore, evaluate their potential hazards and risks of exposure. Finally, consider how they fit into the local context, design vision, and community preferences.