Why traditional insulation methods aren't completely effective
Most people are familiar with the traditional insulating materials like fibreglass, cellulose, Styrofoam and rock wool. All of
these products use their ability to absorb or slow down both convective and conductive heat transfer to provide
insulation properties. But they are not as effective in providing insulation from radiant heat transfer. The facts prove it.
During the winter, 50-75% of heat loss through the ceiling or roof and 65-80% of heat loss through walls is by radiant
heat transfer. While in the summer, up to 93% of heat gain is by radiant heat transfer.
Worse still, traditional forms of insulation are virtually transparent to radiant energy and are also badly affected by
changes in humidity or moisture levels. For instance, a 1% to 1.5% change in the moisture content of fibreglass
insulation will result in a 36% decrease in performance*.