Composite insulated wall panel

A building wall comprising:

• an exterior surface and an interior surface, the exterior surface facing the exterior of the building and the interior surface facing an interior room of the building, the wall having a total wall thermal resistance between the exterior surface and the interior surface;
• a structural member positioned between the exterior surface and the interior surface, the structural member configured to bear at least a portion of a vertical load of the wall;
• and
• an insulated composite wall panel positioned between the structural member and the interior surface, the insulated composite wall panel comprising:
• a skin layer comprising glass fibers;
• and
• a cellulose fiber insulation board attached with a resin to a first surface of the skin layer, the cellulose fiber insulation board having a thermal resistance;
• wherein the thermal resistance of the cellulose fiber insulation board comprises the greatest component of the total wall thermal resistance.