Is glass a good conductor of heat?
In general, non-metals such as wood or glass are not good conductors of heat. This is because they have few free electrons, Different materials conduct heat at different rates. This rate is called the thermal conductivity. A good conductor of heat, such as steel, will have a high thermal conductivity and poor conductor of heat, such as air, will have a low thermal conductivity. In general, non-metals, such as wood or glass, are poor conductors of heat. However, there is an exception. Glass is a good conductor of heat when it is found in fiberglass. How does fiberglass, the most popular insulation, do any good? Because the glass fibers are tiny, and they create tiny pockets of dead air space. Convection barely occurs in these. Tiny pockets of air are actually a decent insulator .When there are billions of tiny pockets of dead air space surrounding your house, heat transfer is reduced. Glass allows radiant heat to pass through freely.
