R-value: Meaning and Definition of

R-val•ue

Pronunciation: (är'val"y), [key]
— n.
  1. a measure of the resistance of an insulating or building material to heat flow, expressed as R-11, R-20, and so on; the higher the number, the greater the resistance to heat flow. Cf.
Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease.
RV R.V.S.V.P.
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