If you’ve been in the construction or M&E (Mechanical & Electrical) game for more than five minutes, you know that the term "lagging" is the bread and butter of site talk. But if you’re looking to level up your career or you’re just starting out, you’ve probably noticed that job boards and high-end contracts prefer the more formal title: Thermal Insulation Engineer. Whatever you call it, the demand for skilled laggers in 2026 is through the roof.