Framing and Sub-Flooring - uneven floors

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drigomo
10-21-09, 09:44 PM
I am at present renovating an old home (1800s) and I have
been trying to find a step by step guide for leveling the
uneven floors. Any suggestions?

chandler
10-22-09, 04:35 AM
Depends on how unlevel they are. Sometime it is best to start below and correct sagging joisting. My former house was an 1800's and was sitting on river rock. A solid house, but needed tweaking a little to correct bouncy floor in the living room.
drigomo
10-22-09, 05:58 PM
The foundation is part solid stone and part granite blocks. Measuring from the foundation towards the center of the home it sinks at a rate of about an inch and 1/2 per 6'.It has been suggested that I remove the top planks and replace that with 3/4" plywood and to level it as I go.

chandler
10-22-09, 06:57 PM
I would opt for correcting it as is, and adding subflooring after you get it corrected. Pull strings on each floor joist to see the actual deflection and correct it with jacks (slowly) until you have it right, then support it properly with more modern methods, including footings and possibly beams to span across the floor joists to keep them in check.
drigomo
10-24-09, 05:42 PM
The plan is to install hardwood floors. So, you would recomend leaving the 7/8" subfloor planks as well as the 7/8" flooring planks and then install plywood on top of that and then the hardwood floor. With that amount of support would I need to use 3/4" plywood?