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Esche wrote:
> We moved in our house (East European Country Home, as it is called;
> cedar shackle roof, brick facade, plaster inside) three years ago and
> enjoy it very much. However, the insulation is poor so that our
> heating bills are killing us (if we heat the whole house in the
> winter: up to $900 per month). I've been researching how to insulate
> the walls and also tried to get some expert advice. It seems like
> blowing cellulose into the space between outside brick wall and inside
> plaster wall is the right thing to do.
>
> Now, my architect relatives/friends (five of them) from Germany tell
> me if there is no vapor barrier between living space and insulation in
> the wall, moisture from the living space might make it through the
> plaster wall through capillary action, and if the moisture doesn't
> make it out anymore then there might occur a mold problem. There must
> be a vapor barrier between living space and insulation. Currently the
> moisture that gets through the plaster walls gets carried away since
> there is a draft going through the space between the joists.
>
> So my question is how to put a vapor barrier into the wall without
> taking the plaster off? Or are the plaster walls enough of a vapor
> barrier already?
>
> If anybody has an idea, please let me know.
>
> Thank you,
> Wilko
>
Thorough discussion here:
http://www.eere.energy.gov/consumer/your_home/insulation_airsealing/index.cfm/mytopic=11810
Commercial paint vapor retarders:
http://www.epaintstore.com/paint/primer_menu.htm
Yes, it is important to control vapor transmission into
the insulation.
Before you go too far, verify that the house actually has
2 X 4 stud wall construction. If the brickwork is
actually the masonry "frame" of the house (not merely facade)
there may be only 1" of air space betweeen the plaster and brick.
Jim
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Re: Vapor barrier for cellulose insulation
