Support Jacks and Posts in Nashville and Middle Tennessee
Crawl Space Services

Support Jacks and Posts

Adjustable steel jacks and posts under beams and joists take out bounce, level the floor and hold it there.

If a floor bounces when you walk across it, or if you can feel a soft spot, there is often too little support under it. Beams and joists carry the floor, and when a beam spans too far or its support has sunk, it bends. Adjustable steel jack posts, set on solid bases, give it new support exactly where it needs it and can be fine-tuned to bring the floor level.

We crawl the space, measure the span of each beam and find where the floor drops. Then we lay out a row of posts at the right spacing, pour or set solid bases and bring each post up to the beam. We turn the jacks a little at a time so the floor rises gently, and we finish with a level check across the rooms above. The result is a floor that feels solid instead of springy.

Where jacks go

They go under beams and girders at the points that carry the most load, spaced to shorten the span and reduce bending.

Solid bases

Each post stands on a concrete pad or footing so it cannot sink, with a plate to spread the load.

Gradual adjustment

Jacks are turned slowly over time to raise a sagging beam so plaster, pipes and finishes are not stressed.

Permanent upgrades

Where the situation calls for it, temporary jacks can be followed by masonry piers or engineered posts.

What is included

  • Crawl-space inspection and floor readings
  • Post layout and bases
  • Installation of footings and posts
  • Gradual adjustment of the beam
  • Final check with a level
  • Photos and care notes
Before and after

See the transformation.

Drag the handle to compare.

After: a crawl space with a straight beam on adjustable steel jacksBefore: a crawl space with a sagging wood beam on leaning wooden blocksBeforeAfter
Sagging beam supported. From a sagging wood beam on leaning wooden blocks to a straight beam on adjustable steel jacks.
Why it works

What you get with Support Jacks and Posts

Adjustable steel posts

Fine tuning.

Shorter spans

Less bounce.

Solid concrete bases

No sinking.

Floors firm and level

Feels solid.

Gradual lifting

Gentle on finishes.

Neat installation

Straight and tidy.

Try it now

Floor Levelness Checker

Enter a floor reading, door gap and crack notes to see how your floor compares and what to do next.

How it works

Our process, start to finish.

  1. 01

    Call and schedule

    You tell us what you have noticed, a crack, a damp smell, a sloping floor or standing water, and we set a visit that fits your day.

  2. 02

    Inspect and listen

    We look closely inside and out, measure floors and cracks, check moisture and drainage and take photos of anything of note.

  3. 03

    Plan and explain

    We explain what is urgent, what can wait and what is optional, and give you a written scope and options.

  4. 04

    Prepare and protect

    We lay floor protection, mark utilities, protect landscaping and set up before any digging or drilling begins.

  5. 05

    Do the work

    We install, seal, lift or repair with the right tools and materials, checking our work as we go.

  6. 06

    Finish and walk through

    We clean up, restore the surface, show you what we did, share care tips and set a reminder for your next check.

Questions

Support Jacks and Posts FAQ

Why does my floor feel bouncy?

The beams and joists may be spanning too far or their supports may have sunk.

Are steel jacks a permanent fix?

Many last for decades on solid bases. Some situations call for masonry piers.

Can jacks level the floor?

Yes, gradually, within what the structure can safely handle.

Will the posts rust?

Quality posts are coated and protected, and a dry crawl space keeps them in good shape.

How many posts are needed?

It depends on the span and load. We lay out the number and spacing in your scope.

Next step

Get your free Support Jacks and Posts estimate.

Tell us about the project and we will call you back to talk it through.

Or call (615) 357-7797 to talk now.

Tell us about your project

We will call you back to talk it through and set up a visit.

Prefer to talk? Call (615) 357-7797. We never sell your information.

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