Normally, ovens are manufactured with insulation covering the top, sides and bottom. If there’s insulation missing in just one of these areas, it can result in a significant loss of efficiency. … Instead, a special type of high-heat insulation is required to ensure the heat is safely trapped inside the oven.

What is the best insulation for heat?

• Aerogel is more expensive, but definitely the best type of insulation.
• Fiberglass is cheap, but requires careful handling.
• Mineral wool is effective, but not fire resistant.
• Cellulose is fire resistant, eco-friendly, and effective, but hard to apply.

Where is the insulation in an oven?

The oven insulation in a typical oven is sandwiched between the actual oven compartment and the metal shell of the appliance. While it is encased between the two elements, the insulation can become grease-covered over time, reducing the efficiency of the material to perform as intended.