vapor/moisture barrier. Needed???
Does a house with plywood siding need a vapor/moisture barrier? All the houses with this type of siding in my neighborhood do not have any barrier. I guess the plywood acts as the barrier since it is not permeable. I can understand using applying it to sheathing before one uses vinyl siding, but what about this type of siding. I mean all of the joints are sealed with caulk. The only reason I ask is that the lumber yard parts guy said I needed it. I have never seen anybody apply this stuff directly to the studs (framing). It has always been applied to sheathing with a permeable siding placed on top. Any info would be greatly appreciated.