Which term describes insulation that is visible on installation surfaces?

• A. Exposed insulation
• B. Concealed insulation
• C. Acoustic insulation
• D. Thermal insulation

Answer: (A)

Exposed insulation describes insulation that you can see on the installation surface. It’s used when the material remains uncovered or exposed rather than hidden behind finishes, which is why it’s recognizable directly on the surface you’re inspecting. Concealed insulation would be hidden behind walls or other finishes, so it isn’t visible. Acoustic insulation and thermal insulation refer to what the insulation does (sound control or heat preservation) rather than whether it is visible, so they don’t describe the situation of being on the surface.