Panel for sheathing system and method

A method of externally sheathing a building structure, the method comprising:

• obtaining at least two panel assemblies, each panel assembly including
• a lignocellulosic panel including
• an outer surface;
• an inner surface;
• and at least one edge;
• and
• a barrier layer secured to the outer surface of each panel, the barrier layer being substantially bulk water resistant and substantially water vapor permeable;
• positioning the panel assemblies adjacent to each other such that the respective edges are proximate to each other and define a longitudinal joint therebetween and such that the respective inner surfaces contact the structure;
• fastening each panel assembly to the structure;
• and
• sealing the joint between the edges of the panel.

A panel system to externally envelope a structure, the system comprising:

• at least two adjacent lignocellulosic panels, each panel including an outer surface, an inner surface, and at least one edge extending therebetween, each panel aligned with its at least one edge proximate to the at least one edge of the adjacent panel and defining a longitudinal joint therebetween;
• a barrier layer secured to the outer surface or the inner surface of each panel, the barrier layer being substantially bulk water resistant and substantially water vapor permeable, wherein the barrier layer includes a resin-impregnated paper substantially covering the outer surface of the panel, the resin-impregnated paper having a paper basis weight of 21.772 kg (48 lbs.) to about 102.058 kg (225 lbs.) per ream and a resin content of less than 80% by dry weight;
• and
• a bulk water resistant edge sealant sealing the joint between the proximate edges of the two adjacent panels.