Originally Posted by Bcoleman6
Thanks for the help. I went to rent a house jack but can't find a place that rents them, so I may end up using the jack wall method.
I've used a combination of a 20 ton bottle jack($60.00 at Sears) and a support wall. The jack lifts it up and the wall keeps it there until you're done. I screw 4x4's along the jack line to the ceiling joists. Build the stud wall the way Mike described and just tap them into place as I go along the line. Screw them in place and add some diagonal bracing.
After you're done with the sill plate, just reverse the process.
Jacking rates will vary with conditions. With plaster walls, go slowly. Near a tiled bath, go very slowly. Best case scenario would be a house with sheetrock.
But don't expect to get by with no patch work. There's usually a crack or 2 that shows up.