Dirt is a poor insulator against the cold.

If the material is a good conductor or a poor insulator and will substantially reflect the radio waves that are incident upon it with almost the same power.

Metal, for instance, is an excellent reflector and a poor insulator.

It is fitted stone, a poor insulator of heat.

Windows are placed to maximize the input of heat-creating light while minimizing the loss of heat through glass, a poor insulator.

"The problem with all metal is that it is a poor insulator," Mr. Russell said.

It is a very poor insulator against water, as it will allow water to collect on its bottom ledge.

Liquids tend to be very poor insulators due to convection.

Common building materials that are poor insulators include glass and metal.

They are heavy, poor thermal insulators, and need much labour to manipulate and time to set.