Structural Repair
Sagging Floor and Jack Post Support
When a beam or joists drop, floors slope and doors stick. We set adjustable steel posts on poured or block footings under the low spots and raise the floor gradually, so the house gets support where it needs it.
- Best forSloping floors and sticking doors
- Typical rhythmOften one to two days, with gradual lifting
- TeamTechnicians who set footings and posts
- Pairs well withBeam replacement and moisture control
What you get
What sagging floor and jack post support includes
- 1Proper footingsPosts rest on solid pads, not on bare soil.
- 2Gradual liftJacks are tightened slowly to protect plaster and trim.
- 3Right spacingPosts are placed where the load needs them.
- 4Checked and recordedWe measure the floor before and after.
How it goes
From the first call to a dry, finished space
- 1Measure the floorWe map the slope and find the low spots.
- 2Set the footingsPads or blocks are placed on firm ground.
- 3Install and raisePosts go in and lift the floor in small steps.
- 4Review the resultWe recheck level and explain how to monitor.
Good fit when
Is sagging floor and jack post support right for you?
- Floors slope toward the center
- Doors and windows stick
- You see gaps between the floor and baseboards
- Posts under the house are missing or leaning
Questions
About sagging floor and jack post support
Can you level the floor completely?
We bring it as close to level as the structure and finishes allow, and we raise it slowly to avoid cracking plaster and trim.
Are the posts permanent?
Steel posts on solid footings are durable. We check them during regular crawl space visits.
Related services
Often paired with this
Support Beam and Girder ReplacementA new main beam that carries the floor above for the long term.See the service 
Pier and Post ReplacementNew piers and posts on solid footings to carry the house again.See the service 
Floor LevelingA step-by-step approach that brings uneven floors back toward level.See the service Where we work
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Thinking about sagging floor and jack post support?
Call or text, or send the form. Tell us what you have noticed and we will tell you how we would handle it.