NAIMA/Insulation Institute frequently fields questions regarding various performance aspects of fiberglass and mineral wool insulation. One of the most common questions we receive is, “what is the typical lifespan of fiberglass and mineral wool insulation?” Other questions come up regarding settling and loose fill insulation. There are many misconceptions about fiberglass and mineral wool insulation products' performance and longevity, so pointing out research that can help dispel myths is often necessary.
NAIMA has sponsored research on fiberglass and mineral wool insulation products' performance in two separate studies. Those tests showed fiberglass and mineral wool do not experience a reduction in thermal performance over time, nor is settling an issue. The following is a brief description of those research projects and their results: