What is an insulation R-value?
The level or performance of batt type insulation products is measured by its Thermal Resistance or ‘R-value’. This is a measurement of the insulation’s resistance to heat transfer and is expressed as a number normally between 1 and 4. The greater the ‘R-value’, the more effective is the insulation at resisting conducted heat flow into the building in summer, and out of it in winter. Therefore the ‘R-value’ is actually a measure of performance. One brand of insulation may be thicker or thinner than another, but if they both show the same ‘R-value’, they will perform equally.
