Using Different Wall Assemblies on the Same House
In the pre-planning stage for a new construction is zone 6A. One of my questions is whether or not it makes sense to mix wall insulation strategies depending on the wall orientation (north, south, east, west) or wall cladding…i.e. stone veneer or vinyl siding.
For example, I like the idea of a double stud wall, but it’s potentially risky for a northern facing wall. Maybe that wall would get exterior foam, while the east, west, and south sides would be built double stud. Too confusing to be practical?
Another example would be a house with mixed siding material. Maybe the walls with masonry veneer could be building in a conventional setup of 2×6 with zip and blown cellulose to avoid a very expensive 14″ thick foundation wall, but the other sides of the house could get exterior foam or double stud.
If one wall has say 30% less total R-value than the other walls, is the loss proportional to the square footage, or does it function like a thermal bridge where a relatively small area loses a disproportionate amount of heat?
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