An insulation system and method 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 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, wherein ACH50 represents an air exchange at 50 Pascals.

An insulation system and method 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 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, wherein ACH50 represents an air exchange at 50 Pascals.

A thermal bridge-free insulation assembly may include hangers to support insulation in an attic. The hanger may include an axis, a proximal end coupled to a rafter, and a distal end coupled to a barrier. The hanger also may include at least two components that are axially movable relative to each other to selectively adjust a depth of an insulation space.

An insulation system for hanging insulation in a truss is disclosed and includes a first rail configured to be installed on a first truss and a second rail configured to be installed on a second truss spaced apart from the first truss. A first cavity is established between the first rail and the second rail. Further, the first cavity is configured to receive and engage a first insulation batt.

A sealed attic insulating and roof ventilating system includes a plenum formed in part by a barrier material attached to adjacent pairs of rafters and having a radiant or reflective upper surface and a corrugated lower surface to which an insulation material may be secured. This arrangement creates an uninterrupted air chamber or ventilation plenum between the barrier material, the adjacent rafters, and the roof decking through which exterior air can circulate unimpeded from the lower vents to the upper vents of the roof. The circulation through the ventilation plenum prevents moisture from accumulating or condensing under the roof decking and warping the roof decking, which ultimately leads to deterioration of the roof decking and failure of the roof covering, and eliminates ice damming on the top surface of the roof covering.

An insulation system and method 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 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, wherein ACH50 represents an air exchange at 50 Pascals.

An insulation system and method 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 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, wherein ACH50 represents an air exchange at 50 Pascals.

A barrier material has an upper, radiant barrier layer and a lower, corrugated surface layer. The radiant barrier layer is preferably a metalized film or an aluminum sheet with an emissivity rating 0.1 or less. The metalized film is laminated to one side of a middle layer using a high, heat-resistant adhesive. The corrugated surface layer, which can receive an insulating material, is preferably a corrugated medium. The corrugated medium is laminated to the other side of the middle layer with a water-resistant adhesive. The middle layer is preferably a fire-resistant, kraft linerboard. The barrier creates an air space or plenum between an external structure and the insulating material designed to prevent heat transfer between an insulated space and the external structure.

An insulation system and method 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 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, wherein ACH50 represents an air exchange at 50 Pascals.

An insulation system for hanging insulation in a truss is disclosed and includes a first rail configured to be installed on a first truss and a second rail configured to be installed on a second truss spaced apart from the first truss. A first cavity is established between the first rail and the second rail. Further, the first cavity is configured to receive and engage a first insulation batt.