We got muddy because we were in a dirt crawlspace doing just that crawling.
How to lift floor joists with jacks.
Tiger brand adjustable floor jack model js 15 15 gauge floor jacks telescoping jack for temporary support size range 1 1 3 4 4 out of 5 stars 368 19 67 19.
Adjust the screw jack so that the top and bottom plates are flush to the wood surfaces above and below.
If the correction is minor only a 1 4 inch over an 8 foot span using shims between the floor joist and the subflooring can often rectify it without the need to raise the floor joist with a jack.
The only tools required is a bottle jack string straight claw hammer circular saw and a light source.
Drive 16 penny nails through the holes in the plates and into the wood framing.
This job took two people one afternoon.
If you have a sagging floor you may need to use floor jacks in order to restore any low points and re level the floor using floor jacks to level a sagging floor should be viewed as a temporary solution to your problem.
Place another set of beams under these.
The long term solution for your sagging floor is to remove the flooring replace or fix the problems with the foundation that may contribute to the sag and replace the flooring.
Jacking up a floor and leveling it is easy with these simple instructions.
Cost time and skills.
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Place beams under the house perpendicular to the floor joists.
Lower the hydraulic jack to transfer the floor load to the new screw jack.
Total cost was less than 200 while a pro would charge 500 1000.
Jacks at each end of these beams lift the house.
Movers may use larger jacks but four 12 ton bottle jacks should lift most homes.
Make repairs to settling piers and weak joists to fix swagging floors and roof lines.
Houses of other shapes or larger homes may require more jacks.