As Rob said, if the wall runs perpendicular to the joists, then it is
*probably* not a bearing wall. However, you need to be sure that it's
not before you take it out. There is one wall in our house that runs
perpendicular to the joists that *is* a bearing wall, and it's not
obviously as bearing wall with at a quick glance.
Check with a stuctural engineer engineer if you are not sure.
Uh, I think you meant to say 'parallel' here, not perpendicular (ie, the
joists cross over the wall.) I do strongly agree about getting an engineer,
or at least a compentent carpenter, in to take an eyeball look in the attic
and in the bathroom. The mere fact that OP has to ask the question means
that he is really in over his head. Not a flame, everyone has to start
learning somewhere. Residential framing ain't rocket science, but you do
need to know what you are doing. In a typical rectangular house, the only
critical bearing walls are usually the outside walls and the one down the
middle, but there are always exceptions. Add an 'L' or a second story, and
you pretty much have to eyeball things to be sure what is going on.
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