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www.reference.com/science/materials-good-insulators-b06a490d0e37f88b

Good insulators are materials that do not allow heat to pass through them. They are also materials that either slow down or do not allow transfer of electricity through them.

www.reference.com/article/material-insulator-4aa65b8deb5e2cb3

The best material that serves as an insulator is glass because of its high resistivity, states Georgia State University or GSU. The photons present in glass do not have enough energy to close the gap between the valence electrons and the conduction band.

www.reference.com/article/insulated-materials-58b41a37c0d18a7b

Insulating materials reduce the heat flow in a home, which allows the air a cooling or heating system produces to stay inside, and protect a home from external temperatures. Insulating materials are given R-values based on their insulating effectiveness; the higher the R-value, the more effective th

www.reference.com/world-view/materials-good-cold-insulators-2131e9062bcbb7d6

The best cold insulation materials are those that poor conductors of heat. Materials such as glass, plastic, polystyrene and fiberglass are poor conductors of heat and are therefore effective as insulation. Materials that are good conductors of heat, such as metals, are poor insulators.

www.reference.com/article/good-insulators-90b0426eb483fbbf

Oil, fur, silk, wool, rubber, glass, plastic, wood, paper, wax and ebonite are good insulators. Insulators are substances with tightly bound outer electrons and heavily resist the flow of electrons. Most nonmetals are classified as insulators.

www.reference.com/article/good-insulator-53d9c2508103dea9

Materials that make good insulators do not have the ability to conduct electricity, such as glass. They insulate because they do not have enough free atoms to conduct electricity.

www.reference.com/article/insulators-c8e2cd3062f10df7

The most accessible and affordable home insulator is rolled fiberglass, and the most effective insulator is closed cell foam, according to HGTV. Cotton batts are a comparable option.

www.reference.com/world-view/examples-insulators-f809978196041929

Some examples of insulators are glass, plastic and rubber. Insulators block the flow of electricity through them due to the stability of the electrons surrounding an atom. However, the electrons in some insulators, such as glass, move more freely in extremely high temperatures and can become conduct

www.reference.com/article/insulation-work-2a03ca5f73fd2801

Insulation slows or prevents heat, sound, electricity, mechanical vibration or radiation from coming through walls. There are four types of insulation: heat insulation, sound and vibration insulation, electrical insulation, and radiation insulation.

www.reference.com/article/different-types-insulation-c3ea0dabacbbe3a5

Fiberglass, rock wool, loose fiber and reflective foam are some of the many types of insulation available. The style of the insulation, such as rolls or boards, can help determine where the insulation should be used in the home.