An insulation batt includes a first stiffening layer; an insulation layer coupled to the first stiffening layer on a first side of the insulation layer; a second stiffening layer coupled to a second side of the insulation layer distal from the first stiffening layer; and a connector coupling the first stiffening layer to the second stiffening layer, the insulation layer configured to compress between the first stiffening layer and the second stiffening layer when the first stiffening layer and the second stiffening layer are pushed together, and the insulation layer configured to expand between the first stiffening layer and the second stiffening layer when the first stiffening layer and the second stiffening layer are pulled apart; and wherein the connector comprises a plurality of mounting tabs.