Basic kitchen foil is not the same as a RadiantGUARD radiant barrier.  Basic kitchen foil is much thinner than a typical radiant barrier product and lacks the middle scrim layer that adds durability in the form of puncture and tear resistance that exists in RadiantGUARD radiant barriers.  Our radiant barriers are almost impossible to tear by hand unlike typical kitchen foils.More importantly, the shiniest of kitchen foils only reflects an average of 88% of the radiant heat whereas RadiantGUARD radiant barriers reflect a much higher percentage of 95- 97%.Also, our radiant barrier foil insulation products are available in a perforated version to allow moisture to pass through reducing condensation issues. Kitchen foil is not perforated and therefore, traps moisture.