The most common form of insulation on the market, Fiberglass is the baseline for efficiency. While interior wall sound batts make for adequate sound abatement, fiberglass used thermally is somewhat limited in function without sealing penetrations, usually considered an upgrade with a fiberglass install.
Fiberglass is air permeable allowing air to move freely through its fibers which can lead to convective heat loss through walls, floor joists, vaulted roof lines, and ceilings. Installation mistakes are costly to effective R-Values. Performance is affected by faulty installation such as compressed batts or improperly sized cuts leaving dead space in the cavity, sometimes cutting insulation performance down below half the stated R-Value. This is a great example why choosing the right installer is imperative. Caulking and sealing around cripple studs, windows, and the bottom and top plate significantly improves fiberglass’ performance. Unfortunately, most crews ignore this crucial step. Talk to Foam-One-One about the best installation method to get the most out of your fiberglass insulation project.