Insulated box

A method for folding an insulated blank assembly comprising:

• folding a first side panel of a cardboard blank of the insulated blank assembly relative to a bottom panel of the cardboard blank about a first fold line to position the first side panel perpendicular to the bottom panel;
• and
• folding a second side panel of the cardboard blank relative to the bottom panel about a second fold line to position the second side panel perpendicular to the bottom panel, the cardboard blank defining an inner surface and an outer surface each extending over the first side panel, the second side panel, and the bottom panel,
• the inner surface at least partially defining an inner cavity, the insulated blank assembly further comprising at least one insulation batt coupled to the outer surface and insulating the inner cavity, the at least one insulation batt comprising an insulation material formed of a mixture of repulpable cardboard cellulose fiber and between about 2% and about 25% thermoplastic binder fiber distributed substantially randomly within the repulpable cardboard cellulose fiber, the thermoplastic binder fiber adhered to the repulpable cardboard cellulose fiber
• wherein subjecting the insulation material to a repulpability test produces greater than 85% yield.