Is there off-gassing from fibreglass?
No. There is no off-gassing with fibreglass insulation as it does not contain VOCs, penta-BDEs, hydrochlorofluorocarbons or other gasses or compounds. Note that the US Dept. of Energy states that “Over time, the R-value of polyurethane (foam) insulation can drop as some of the low-conductivity gas escapes and air replaces it. This phenomenon is known as thermal drift.” Unlike foam, fibreglass does not deteriorate.
