We saw hints before we started the project that there had been a fire at some point, but we weren’t sure of the extent.  The fire predated the current owners, and they weren’t aware of any lingering issues.   When we opened up the walls, it became clear that the fire had been quite extensive.  There was charred framing, lath, and sheathing throughout one of the rooms, as well as evidence of a less-than-careful repair job.  Large areas of framing and sheathing were painted white, presumably with a shellac-based odor-blocking paint, and other sections had been crudely replaced. One inside corner, though, was particularly troubling.  It wasn’t just ugly, but seemed like it might be structurally insufficient.   The post was painted white, so…