Support Posts & Main Beam Repair
Adjustable, code-compliant support posts replace failing jack posts and sagging beams to properly level and reinforce your floor system, solid support that won't quit. When a main beam is past saving, we repair or replace it outright.
Support Posts & Main Beam Repair in Kansas City
Adjustable, code-compliant support posts replace failing jack posts and sagging beams to properly level and reinforce your floor system, solid support that won’t quit. When a main beam is past saving, we repair or replace it outright.
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The Structure Holding Up Your Floors
Not every floor problem is a foundation problem. In a lot of homes the culprit is the support system in the middle of the basement: a main beam carrying the floor joists, held up by posts bearing on footings in the slab.
When those posts are undersized, corroded at the base, or set on inadequate footings, they settle. When a wood beam takes on moisture over years, it sags. Either way the floor above goes with it, and you get the bounce, the slope, and the doors upstairs that stop closing right.
How We Repair The Floor Support System
Find what is actually moving
Sloping floors could be the beam, the posts, the footings under the posts, or the foundation itself. Those are four different repairs. We measure and determine which before recommending anything.
Adjustable, code-compliant posts
Failing jack posts, temporary screw jacks left in permanently, and undersized columns get replaced with proper adjustable support posts, set on adequate footings and sized for the load.
Footings under the posts
A post is only as good as what it sits on. A properly sized post bearing on a thin slab with no footing beneath it will punch down over time. Where the footing is inadequate, that gets corrected as part of the work.
Beam repair or replacement
Where the main beam is sagging, checked, or has taken moisture damage, it gets repaired or replaced. On a beam that is past saving, replacement is the honest answer even though it is the bigger job.
Gradual adjustment
Where lifting is appropriate, it is done gradually. Jacking a settled floor system quickly is how you crack plaster, drywall, and tile that were doing fine. Patience here protects the finishes upstairs.
Signs Your Floor Support Needs Attention
What to look for
Floors that bounce or feel soft underfoot, a visible slope or dip in one area, doors upstairs that stick, gaps opening at baseboards, and, in the basement, posts that are rusted at the base, visibly out of plumb, or sitting on a slab with no visible footing.
The good news
Floor support work is generally less invasive and less costly than foundation piering, and it is confined to the basement. If your sloping floor turns out to be a post and beam issue rather than a footing issue, that is the better outcome, and it is worth confirming which one you have.
What Determines The Cost
We do not publish a price, because a number without seeing your foundation is a guess. Here is what actually moves it, so you know what we are looking at during the free inspection.
- Number of posts being replaced or added
- Whether footings have to be poured beneath the posts
- Length of beam being repaired or replaced
- Whether the beam is repaired in place or replaced outright
- Access, since getting a beam into a basement is its own problem
- Temporary shoring required while the work is done
Support Posts & Main Beam Repair FAQs
Commonly a failing support post, a sagging main beam, or inadequate footings under the posts. Less commonly, foundation settlement. Those need different repairs, so identifying which one you have is the first step and it is what the free inspection is for.
Yes. The floor system is temporarily shored while the post is replaced, then the load is transferred back. Done gradually, finishes upstairs are generally undisturbed.
Usually yes. Temporary jacks are not intended to be permanent structural support and often lack proper footings beneath them. Replacing them with adjustable, code-compliant posts on adequate footings is common work for us.
Sometimes, depending on the extent of the damage. Where a beam has significant rot or structural damage, replacement is the honest answer. We will tell you which one you are looking at rather than defaulting to the larger job.
Often they improve substantially. How much depends on how long the settlement has been happening and what the finishes upstairs will tolerate. We adjust gradually for exactly that reason, and we would rather leave a floor slightly imperfect than crack your tile getting it flat.
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