I’m in the process of building a master bedroom suite to our house, which is located in Oregon – marine climate.
We have 2×6 stud walls that are presently empty but we expect to fill with fiberglass insulation, and 7/16 inch OSB sheathing covered with Tyvek Drain wrap. Soon, I intend to add a 3/8 inch thick furring strip to create a rain screen before installing Hardiplank siding. My windows have already been installed and flashed.
I’m interested in improving the performance of this wall; however, the professionals we hired thus far have disagreed with the idea as being cost inefficient and impractical. What are my options at this point?
I’ve read the articles about installing rigid foam to the exterior. Would installing one-inch, foil-faced, rigid foam to the interior surface of the 2×6 reduce vapor/thermal bridging issues? I would tape off the seams, and I’m familiar with the issue of extending electrical boxes and jambs. This interior foam would be topped be 1/2 inch drywall. Thanks for the advice.
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