The key to any successful home improvement project is planning. Above all, take precautions to avoid a dangerous working environment when working in the attic. Use an OSHA-approved dust mask rated to prevent inhalation of dust and insulation fibers. Also, wear old clothes, gloves, knee pads, eye protection, and remember to watch your step walk on ceiling joists or truss cords. Learn more about how to plan to seal and insulate your home from our Do-it-yourself (DIY) Guide to Sealing and Insulating. Visit Seal and Insulate with ENERGY STAR for more information.