Insulators apply insulation materials to plumbing, heating, cooling, and refrigeration systems, piping equipment, pressure vessels, and interior surfaces of buildings to prevent / reduce the passage of heat, cold, sound, and fire.

In general, you usually need a high school diploma. You may need trade certification in the province / territory where you'll work. To gain trade certification, you usually need an apprenticeship or a combination of experience and trade courses. Qualified tradespersons in this group may also obtain interprovincial (Red Seal) trade certification, which provides job mobility throughout the country. Many recent entrants have a high school diploma, and almost 1 in 4 has a trade / vocational certificate or community college diploma.