Union insulator jobs include apprenticeships as well as roles as an insulation installer and foreman. Tradespeople who specialize in insulation can join an organization like the International Association of Heat and Frost Insulators & Allied Workers, a union which protects workers’ rights and promotes safety standards. As an apprentice, you work under the supervision of a senior tradesman and learn to install, remove, and repair insulation in roofs, walls, or around plumbing, HVAC, and mechanical systems. As an insulator or foreman, your duties involve ensuring work is done well and complying with cleanliness and safety standards. Other responsibilities include keeping track of job site materials and generating daily progress and inventory reports.