Understanding Thermal Values (R-Values) of Carpet and Cushion
An industry-sponsored study of the thermal characteristics of carpet – with and without cushion – conducted by the Georgia Institute of Technology School of Textile Engineering, concluded that the total R-value is more dependent on the total thickness of the carpet than on the type fiber content.
When the carpet R-value is not available, the study suggested multiplying the total carpet thickness measured in inches by a factor of 2.6 to approximate the carpet’s R-value. The study also found that R-values are additive for any combination of materials. For example, a combination of carpet with an R-value of 1.3 and a prime polyurethane cushion with an R-value of 1.6 will yield an overall R-value of 2.9.
Understanding R Values (PDF 47 KB) to download a PDF with more detailed R-value information that was taken from the study conducted by the Georgia Institute of Technology School of Textile Engineering.
Documents in Portable Document Format (PDF) require the use of the free software Adobe Reader. If you experience difficulty reading a PDF document, please consider upgrading your Adobe Reader software to the latest version, which is available on the Adobe website.