Early life and education[edit] Rice was born in Washington, D.C., to Emmett J. Rice (1919â2011), Cornell University economics professor and the second black governor of the Federal Reserve System, and education policy scholar Lois Fitt (nÃ©e Dickson), currently at the Brookings Institution. Her maternal grandparents were Jamaican.
A vapour barrier (or vapour barrier) is any material used for damp proofing, typically a plastic or foil sheet, that resists diffusion of moisture through wall, ceiling and floor assemblies of buildings to prevent interstitial condensation and of packaging.he function of a vapor barrier is to retard the migration of water vapor, which are not typically intended to retard the migration of air. This is the function of air barriers.
Properly defined, a vapor barrier alone does not control air movement; it controls the movement of moisture. In fact, a vapor barrier is not actually a barrier; itâs a vapor diffusion retarder (VDR). A VDR regulates moisture flow from inside out or from outside in at the molecular level. This moisture control function happens wherever the VDR is used in the structure.