Diffusion

May 20, 2019 | Definitions and Terms

Diffusion

In physics, Diffusion is the net movement of molecules or atoms from an area of higher concentration to an area of lower concentration.

In the building industry and building sciences, we most often use the concept of Diffusion to understand and/or anticipate how water will move through a material or an assembly of materials. Water, often in the physical form of water vapor.