The thermal resistance of insulation or a glazing system. The R-value is the reciprocal of the U-value. The higher the R-value, the less heat is transmitted throughout the insulation or glazing material.
Merriam-Webster Online Dictionary
R-value (noun)a measure of resistance to the flow of heat through a given thickness of a material (as insulation) with higher numbers indicating better insulating properties - compare u-value
R-value (Wikipedia)
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R-value or rvalue may refer to:
- In computer science, a value considered independently of its storage location
- R-value (insulation) in building engineering, the efficiency of insulation of a house
- R-value (soils) in geotechnical engineering, the stability of soils and aggregates for pavement construction
- R-factor (crystallography), a measure of the agreement between the crystallographic model and the diffraction data
- In statistics, the Pearson product-moment correlation coefficient, or simply correlation coefficient
- In solid mechanics, the Lankford coefficient