The vapour barrier in the attic is not continuous. Between each set of rafters there are great strips of brittle poly film with large gaps between them. In places there is more space than vapour barrier. In effect there is no vapour barrior. If I remove the insulation and place continuous strips on the drywall and up the rafters sealing the edges of the strips to the edges of the next strip as well as sealing all wire holes and other protruding will this be better than leaving it as it is.
Answer:
The answer is basically the same - gaps in VB are not good and if you can arrange to avoid them, you'll be farther ahead. In the situation you describe, I'd be tempted to lift the insulation, remove the sporadic VB and re-install the insulation and even add to it if you wish. The vapour barrier phase would better be addressed from underneath. This means applying a continuous layer to the uppermost ceiling of the house and then applying drywall over it. This seems very involved but the extra layer of drywall will also give you more bulk and that is important as a temperature retaining medium.
Remember, even if you don’t do your own work around the house have to hire someone, you put yourself at a great advantage when you can intelligently discuss a project with the various trades people.
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