Use a string to watch the floor come up.
How to jack up a wood floor.
Stack 8 x 12 blocks two wide in a criss cross pattern until they as close to the bottom of the girders as possible.
You cannot simply put a screw jack under the lowest spot and start turning.
Jack up that portion of the house and place new footers.
Keep an eye on the girder so that it does not get out of position and try to roll.
It took a long time for your floor to sink so you can t push it back up quickly without causing cracks and stress in the building.
In this series i am taking an old 10 x 14 foot pre fab shed and making it a finished office and.
It has to be jacked up slowly over days or even weeks to avoid cracking drywall plaster windows and even structural elements.
Once the floor is at the right level jack it up just a little bit higher.
Anything involving 20 ton house jacks will take time.
Slowly jack up the floor.
Jacking must proceed slowly.