bulk insulation

bulk insulation

[¦bəlk in·sə′lā·shən]
(engineering)
A type of insulation that retards the flow of heat by the interposition of many air spaces and, in most cases, by opacity to radiant heat.
References in periodicals archive ?
Environmental Protection Agency (EPA) does not recommend using paints or coatings in place of traditional bulk insulation.
Additional heating is provided through just one appliance, a rarely used low-wattage ceramic plate heater, backed by a stacked-stone veneer background and bulk insulation.