There are several types of thermal insulation, including:

1. Fiberglass Insulation: Made of tiny glass fibers and is one of the most common types of insulation used in homes.

2. Cellulose Insulation: Made of recycled paper and treated with chemicals to make it fire-resistant.

3. Spray Foam Insulation: Made of polyurethane and is applied as a liquid that expands to fill gaps and cracks.

4. Mineral Wool Insulation: Made of natural rock materials and is fire-resistant.

5. Reflective Insulation: Made of aluminum and is installed in attics and walls to reflect heat away from the building.

6. Radiant Barrier Insulation: Made of a thin layer of aluminum and is installed in attics to reflect heat from the roof.

7. Polyisocyanurate Insulation: Made of a foam board that is covered with a foil facing and is used in walls and roofs.

The choice of insulation type depends on several factors such as the climate, the location of the building, the budget, and the desired level of insulation.