r-value, definition of


The R value or R-value is a measure of thermal resistance used in the building and construction industry. The bigger the number, the better the building insulation's effectiveness. R value is the reciprocal of U-value. Often used as a measure of bulk insulation products, such as a roof insulation Batts.

Original Wikipedia entry

EcoWho Articles where 'r-value' used:Online tools where 'r-value' used:
  • R-value to U-value Calculator
    R-value to U-value conversion calculator
  • Insulation Batts Coverage Calculator
    Calculator for the number of insulation batt packs required for a ceiling or wall. Also works out how downlights effect the final insulation R-Value.
  • R-Value Area Calculator
    Calculator to help work out the total R-Value of a wall with a window or other fitting within it.
  • R-Value Calculator
    R-Value calculator to work out the total R-Value of a set of materials, say in a wall, ceiling or floor. Great for working out rate of heat loss or gain.
News & Blog articles where 'r-value' used:

Related Tags: insulation, building, energy efficiency

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