On Sun, 01 May 2005 19:40:10 -0500, Josh R
wrote:

I'm in the process of rehab'ing a single story brick structure that has
seen years of abuse and neglect. The floor is in need of leveling and I
intend to sister the floor joists to achieve this. There is a large
window (approx. 8' x 5') in the back wall and the top of the window
"frame" is a 6"x8" piece of timber running the 8' width. Over time,
stress from the weight of the back wall & roof has taken its toll on
this piece of wood and it has now taken on a sort of tilda (~) shape.

The sagging roof joists need to be jacked up and the brickwork in the
back wall corrected. My question is simple. Does it make any difference
in which order I perform the aformentioned tasks?

Should I level the floor, install new subfloors then jack up the roof?
This would put a good deal of downward stress on the newly sistered
joists. The sistered joists *should* be sturdy enough to avoid knocking
the floor out of level again.

Should I jack up the ceiling first and place the stress on the original
unreinforced joists (they're 100+ yr old 2x8's)? I'm afraid this may
worsen their current condition.

Does it make any difference or am I just being paranoid?

thanks,
-josh

First thing you do is protect the last thing you do from major
problems while doing the other. I like to start at the bottom (as do
most pros) so I'll put some temporary bracing in the weak spots of
your upper structure while leveling from the bottom. The 'tilda' may
be about to break and your roof may be about to fall thru that weak
window so brace it up temporarily while you are messing with the
floors.