02:44PM | 01/13/09
Member Since: 01/12/09
1 lifetime posts
We have a brick home that was built in 1896, the last couple of years just in the winter mold has been forming on the inside walls just in three of the four corners of the house on the first floor. the walls are plaster over double walled brick. Our attic has blown in cellulose insulation, most of our windows are new double hung. We are heating with ventless gas heaters at the moment could they be part of the problem. Any thoughs on this matter would be appreciated


08:03AM | 01/14/09
Member Since: 04/25/05
1915 lifetime posts
Now moisture might be wicking through the walls.

But I think that you have too high an internal mositure level.

In older homes air leaks out around old windows and through gaps in the attic, among other places.

That warm moist air is replaced with cold dry outside air keeping the moisture levels down.

You have reduced two of those with the new windows. And the cellulose will seal may cracks that allow air flow.

So that keeps up the moisture level.

But probably the biggest problem is the use of the "ventless" heaters.

There is really no such thing as ventless gas heaters. They are just vented to the inside of the house. And the primary output of gas heater is WATER MOISTURE.
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