Our project hoped to omit a poly air/vapour detail by opting for air-tight sheathing (with larsen truss over top)and a vapour barrier paint (vbp). unfortunately, the building inspector is not only not buying what i’m selling, he is clearly not impressed. so, i am commited to our air-tight sheathing approach: will it be unhealthy for the wall system to then use a conventional poly vapour barrier detail? the british columbia building code (bcbc) allows for a “wall coating” alternative to poly; does anyone know of a specific product that meets these specs? also, how do you detail vbp, say, around where an interior wall intersects an exterior wall or where and interior wall meets the ceiling? should you still add poly behind these intersections?