Insulation and soundproofing
Thermal Drift in Foam Insulation: Understanding R-Values in Insulation, Why They Change and Degrade Over Time
...extruded polystyrene (XPS)
Extruded Polystyrene (XPS) rigid foam, often recognizable by its distinctive pink, blue, or green color, is typically considered to be R-5.0 per inch (RSI~0.88 per 25~mm), but is that accurate?
The mechanism of drift
Like Polyiso, XPS relies on a captive blowing agent (Historically HCFCs, n...
