Systems, methods, and apparatuses for insulating adjacent to a top of an attic

An insulation system comprising:

• an insulation layer,
• an atmospheric regulation layer,
• a structural support, and
• an external surface;
• wherein the atmospheric regulation layer is supported by the structural support,
• wherein the insulation layer is located between the atmospheric regulation layer and the external surface,
• wherein the insulation layer has a thickness, wherein the thickness extends from the atmospheric regulation layer to the external surface, and wherein the thickness of the insulation layer comprises a unitary construction,
• wherein the atmospheric regulation layer has a water vapor permeability of not greater than 1 perms at a relative humidity of 25% as measured by ASTM E96 Procedure A Dry Cup,
• wherein the atmospheric regulation layer has a fire class A rating as measured by ASTM E84, and
• wherein the continuous atmospheric regulation layer has a ACH50 value of not greater than 10, or not greater than 5, or not greater than 3, or not greater than 1.5, or not greater than 0.6, wherein ACH50 represents an air exchange at 50 Pascals.

An insulation system comprising:

• a rigid material,
• an insulation layer,
• an atmospheric regulation layer, and
• an external surface;
• wherein the atmospheric regulation layer is supported by the rigid material,
• wherein the insulation layer is located between the atmospheric regulation layer and the external surface,
• wherein the insulation layer has a thickness, wherein the thickness extends from the atmospheric regulation layer to the external surface, and wherein the thickness of the insulation layer comprises a unitary construction,
• wherein the atmospheric regulation layer has a water vapor permeability of not greater than 3 perms at a relative humidity of 25% as measured by ASTM E96 Procedure A Dry Cup, and a water vapor permeability of at least 6 perms at a relative humidity of 75% as measured by ASTM E96 Procedure B Wet Cup,
• wherein the atmospheric regulation layer has a fire class A rating as measured by ASTM E84, and
• wherein the continuous atmospheric regulation layer has a ACH50 value of not greater than 10, or not greater than 5, or not greater than 3, or not greater than 1.5, or not greater than 0.6, wherein ACH50 represents an air exchange at 50 Pascals.