Drying to interior and paint
I’ve been learning all the Building science I can lately, and of course, that leads to questions! Hope folks here can entertain a few.
Here is one question I’d love some feedback on.
Consider a New England home that is to get outsulation, or exterior foam insulation in retrofit, or new construction. Almost all outsulation details create a vapor impermeable surface, and thus the wall is then expected to be able to dry to the interior.
How many coats of paint can a gypsum board wall take before the perm rating gets so low as to be risky?
People like to repaint, either to change color, or just “spruce the place up”, particularly when a house changes hands.
Is this method just insuring a future for sheet rockers?
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