How does fiberglass insulation compare to reflective foil insulation?
Fiberglass insulation, which is very effective for its uses, depends on R-Value or resistance alone to insulate against summer heat gain and winter heat loss. Thin layers of fiberglass are due virtually nothing to stop reflective heat or energy transfer. Fiberglass insulation is also affected by changes in humidity or moisture levels. A 1 to 1 1/2% change in the moisture content of fiberglass insulation can result in up to 36% decrease in performance. Unlike fiberglass insulation, our reflective foil radiant barrier products are not affected by humidity and moisture changes and will continue to provide energy savings and insulation value no matter what the moisture level is. Reflective foil radiant barriers also have additional uses that fiberglass insulation is useless for such as radiant heating systems or any under or over concrete slab applications. In these uses reflective foil insulation is the premier if not only choice to use.
Related Questions
- For no more than insulation costs, I would use the same R 6 on all of the ductwork. I prefer the fiberglass with the foil exterior to wrap existing duct. It would actually not require any other moisture barrier as long as the joints are well fitted and sealed with mastic.
- Ive heard that I should not use fiberglass insulation in crawlspaces or basements. Is reflective foil insulation a good product to use?
- How does fiberglass insulation compare to reflective foil insulation?
