An insulation retention apparatus includes a non-gas-permeable plastic sheet. At least a first foam strip is affixed to the non-gas-permeable plastic sheet along a first side and at least a second foam strip is affixed to the non-gas-permeable plastic sheet along a second side, wherein the first side is substantially opposite the second side. An adhesive is positioned on each of the first and second foam strips, wherein the first foam strip is affixed to a first overhead structural beam with the adhesive and the second foam strip is affixed to a second overhead structural beam with the adhesive, wherein the first overhead structural beam is positioned spaced from the second overhead structural beam wherein the non-gas-permeable plastic sheet is extended therebetween, and wherein a quantity of insulation is retained on the non-gas-permeable plastic sheet.