The Science of Cavity Insulation
The reason cavity insulation keeps heat in is that the polymer and air in the cavity are good insulators. This is because the distance between the particles in the air is greater than in a solid. Other benefits of cavity walls are their resistance to moisture from the outer side to the inner wall and the increase of sound proofing.
Read more about this topic: Cavity Wall
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“Science in England, in America, is jealous of theory, hates the name of love and moral purpose. There’s revenge for this humanity. What manner of man does science make? The boy is not attracted. He says, I do not wish to be such a kind of man as my professor is.”
—Ralph Waldo Emerson (1803–1882)