Does LTTR go far enough to evaluate the long term performance of insulation?
You have seen this concept of Off Gassing before in Helium Balloons. When the party is over, those floating balloons are now down on the ground the next morning. Why? The helium gas has migrated out of the balloon.
Buildings are designed and built to last 50-100 years in most cases. If LTTR only gives use a clear picture of the first 5 years of insulation performance, how does that information effect the economies of the building? Does it cost more to operate than expected? Did we over pay for a insulation that has a shrinking R-value? Are their long-term health impacts from the off gassing?
We believe that higher priced rigid insulation, that losses much of its thermal residence over time, is not a good value or investment. See Chart
“EPS - The Safe Insulation”
“EPS - The Great Investment”