The science of carpet insulation
Ever wondered why the insulating effect of carpet is ten times higher than that of hard floors? The explanation is simple: physics teaches us that air is a poor conductor of heat and therefore a good insulator. That’s exactly why there is air between the two panels of glass in double glazing. The same logic goes for carpet: between the carpet fibres there is a layer of trapped air that acts as an insulator. Of course, the extent of this depends on the fibres and pile depth. The thicker the carpet, the better its insulating effect. Carpet with underlay delivers even better results.
This illustration shows that carpet reduces the heat flow through the floor by acting as an insulator (Source: Dr. Lothar Siebel, Sachverständiger für Bauphysik, Aachen)
(Source: GUT Gemeinschaft umweltfreundlicher Teppichboden e.V)