White Paper- R-value and Performance of BuildBlock and BuildLock Knockdown Insulating Concrete Forms

The R-value is a measure of thermal resistance used in the building and construction industry and is generally understood to indicate how efficient the insulation value of the material or product. R-value under uniform conditions it is the ratio of the temperature difference across an insulator and the heat flux (heat transfer per unit area per unit time, QA) through it or R=ΔT/QA. Thermal resistance varies with temperature but it is common practice in construction to treat it as a constant value. (A common method is to standardize the temperature at which the values are reported. (75° typical) (1). BuildBlock