Marking: R
Unit of measure: m2K/W
(Typically RD i.e. declared by the manufacturer, declared-calculated value as the ratio of thickness (m) to λ (W/mK) )
A calculated thermal characteristic that indicates the resistance of a particular layer (typically thermal insulation layer) to heat transmittance.
The higher the R value the greater the resistance to heat transmittance.
Knowledgebase