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.
How to jack up a wood floor. Slowly jack up the floor. Use a string to watch the floor come up. You cannot simply put a screw jack under the lowest spot and start turning. Once the floor is at the right level jack it up just a little bit higher.
Jack up that portion of the house and place new footers. Anything involving 20 ton house jacks will take time. As with other structural repairs jacking must also be done appropriately. Jacking must proceed slowly.
It has to be jacked up slowly over days or even weeks to avoid cracking drywall plaster windows and even structural elements. You cannot jack up a house in one day. Raising up a shed w a car jack and adding concrete blocks.