XPS foam / Green Building & Sustainable Home Renovation Information & Advice

...foam has an R-value of 6.3 per inch; when used at an 8-inch thickness, the foam has an R-7.4 value per inch, which exceeds the performance of any foam insulation currently on the market.  The installation of spray foam requires the mixing of chemicals on site, and that reaction generates a lot of heat. So spray foam bl...

...foam panels was compared to the same assembly using 2" of EPS foam and was found to be losing 30% more heat in this study (see below)! XPS - Extruded polystyrene foam panels - The blue, pink or green ones (eg. Styrofoam): XPS is Rated at R5 per inch, but it will off-gas and lose some insulation performance over time - ...