What’s a good way to detail an exterior corner with rigid foam?
I’m planning on improving an existing 2×4 wall by installing 2 layers of 2″ polyiso or 4-1/2″ nail-base panels. I’ve found good pointers on this site for most of the details, but am still unsure about how to handle the exterior corners so that the rain-screen strips and siding corner-boards have something solid to attach to. The corner-boards will likely only be a few inches wide, so not wide enough to catch any framing. I’m assuming a butt-corner with nail-base, so there would be OSB on only one side of the corner. How do you do this without creating a thermal bridge?
Hope that makes sense.
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