What is the purpose of insulation?

• A. Absorb Moisture
• B. Keep Hot Things Hot and Cold Things Cold
• C. Provide Structure
• D. Reduce Weight

Answer: (B)

Insulation slows down heat transfer between spaces by using materials with low thermal conductivity and trapped air. This keeps heat from moving in or out quickly, so hot things stay hot longer and cold things stay cold longer. That’s why its purpose is described as maintaining temperatures, which also helps save energy and improve comfort. Absorbing moisture isn’t the goal; moisture can reduce effectiveness and cause issues. Providing structure is the job of the building’s frame and materials, not the insulation. Reducing weight may be a side effect of using lightweight materials, but it isn’t the primary purpose of insulation.