Building membrane with porous pressure sensitive adhesive

An air permeable and vapor permeable building membrane comprising:

• a plurality of permeable plastic sheets secured together;
• a coating of permeable pressure sensitive adhesive coated to an outer surface of one sheet of said membrane, said pressure sensitive adhesive comprising:
• a copolymer with a backbone of n-butyl acrylate, 2-ethylhexyl acrylate, and vinyl acetate, in an amount between 45% and 50%, inclusive, of the total weight of the pressure sensitive adhesive uncured,
• a first surfactant, that includes an ethoxylated acetylenic diol that includes 30% to less than 50% docusate sodium, and 30% to less than 50% ethoxylated 2, 4, 7, 9-tetramethyl 5 decyn-4, 7 diol, in an amount between 4% and 6%, inclusive, of the total weight of the pressure sensitive adhesive uncured, and that promotes emulsification and foaming when the pressure sensitive adhesive is mixed to foam the pressure sensitive adhesive,
• a second surfactant in an amount between 1.5% and 2%, inclusive, of the total weight of the pressure sensitive adhesive uncured, that promotes foaming when the pressure sensitive adhesive is mixed to foam the pressure sensitive adhesive,
• a thickener, that includes C10H14N5NA2O12P3, in an amount between 0.2% and 0.4%, inclusive, of the total weight of the pressure sensitive adhesive uncured, and that increases the viscosity of the pressure sensitive adhesive when the adhesive is mixed to foam the pressure sensitive adhesive, and
• water in an amount between 40% and 50%, inclusive, of the total weight of the pressure sensitive adhesive uncured,
• wherein after the pressure sensitive adhesive is mixed and cured, the pressure sensitive adhesive includes interconnected pores that provide a path through the pressure sensitive adhesive through which water vapor may flow at a transmission rate ranging from about 20 Perms to about 70 Perms.