The term ‘R value’ is an industry measurement that is used to represent a particular materials ability to resist heat flow.
Any materials which have an identical R value should perform exactly the same. This isn’t always the case. R value testing is done in a laboratory where conditions are kept constant. This unfortunately does not happen in real world applications.
What makes our EPS a better choice for insulation is the closed cell structure can maintain its thermal resistance no matter the ambient conditions at work.
This is something other insulation materials can’t provide.