OSB as air barrier
I read the relevant GBA article, and the entertaining comments section (which left me perhaps more confused than before. Since that is a pretty old article, I’d like to ask if there is any updated info. What is the latest opinion on it? Were the air leakage failures ever determined to be manufacturing defects or an inherent problem with OSB? My house was built with 7/16 OSB interior sheathing as the air barrier / vapour retarder. I’m finally getting close to putting up drywall, and wondering if I should do anything else before it’s closed up. Would a coat or two of latex primer on the be of any help? I know it’s not going to get every crack and seem, but if the OSB itself is potentially going to leak, I’m thinking that a coat of paint over 95% of it would be a significant help.