Weatherizing, insulating and sealing are important parts of energy efficiency and conservation programs creating a market for green jobs. Various types of weatherizing, insulating and sealing products include blow-in and spray-on applications. These may require a certain amount of training in order to apply these materials to product specifications in order to achieve proper weatherization. The materials used in these types of applications can include, but are not limited to: for blow-in, fiberglass and cellulose; for spray-on, spray polyurethane foam (SPF), spray polystyrene, and spray latex sealant. Jobs in the weatherization industry (either for new homes and commercial/public buildings or retrofitting old homes and commercial/public buildings) have increased significantly over the past 10 years. Weatherization jobs include work-related activities from direct installation of weatherization and insulation materials (applicators) to assisting applicators with installation of weatherization materials to cleanup. All weatherization applications and materials have some benefits. All weatherization applications and materials have some hazards. The hazard information and solutions common to all these applications and materials include: confined spaces, falls, electrical, medical and first aid, ventilation, proper personal protective equipment and respiratory protection. Unique hazards are outlined in the sections below under the individual materials