Does the vent need to be plastered in a cold roof?
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I think most people here with two full floors have a cold roof, i.e. the insulation is right on the concrete ceiling. Have you plastered the vent in the batten area?
Answer
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I've been looking at this since yesterday and for some reason I can't figure it out. As far as I can tell, ventilation at the transition to masonry is not required if the vapor barrier is installed. But I don't know if that is true.
