Slab Foundation Repair
Underpinning and stabilisation for settling concrete slabs, the dominant foundation type in post-1960s Tallahassee homes
Repair Type
Pier and Beam Foundation Repair in Tallahassee
Shimming, sistering, and pier rebuilds for the raised crawl space homes in Tallahassee's older neighbourhoods.
Before slab-on-grade became standard, houses in Tallahassee were built raised, on masonry or brick piers with wood girders and joists spanning between them, and a vented crawl space underneath. Plenty of those houses are still here, particularly in the older parts of the city near Park Avenue, Calhoun Street, and Los Robles. Pier and beam foundations fail differently from slabs: piers settle or crumble, girders sag between supports, sill plates and joist ends rot where they stay damp, and floors develop the soft bounce and visible slope that homeowners usually notice first. The upside is that a raised foundation is accessible, so the repair is direct and usually less expensive than slab underpinning. Most pier and beam corrections in Leon County run $4,000 to $15,000. Typical duration is two to six days.
What the scope covers
- Full crawl space assessment with floor elevations taken room by room and mapped against the girder and pier layout
- Existing pier evaluation for crumbling mortar, spalling block, undersized footings, and improvised supports added over the years
- New concrete footings and block or steel adjustable piers set where the original support has failed
- Girder and joist sistering where members have sagged, split, or lost bearing
- Sill plate and joist end replacement where rot or insect damage has taken the wood
- Controlled re-levelling of the floor system in stages, so plaster and drywall above have time to adjust
- Crawl space access, vapour barrier, and drainage conditions reviewed as part of the same visit
Where you are changes the answer
Leon County spans three geologic provinces, and the ground under a house on the north side of Tallahassee is not the ground under a house on the south side. The Red Hills clay guide covers the northern half, the karst plain guide covers the southern half, and the main Tallahassee guide puts the whole picture together.
Pier and Beam anywhere in the county
Someone comes out, takes the elevations, and writes you a price. It costs nothing, and the ground conditions for your specific area are covered on its own page.
Detail
Questions about pier and beam
How much does pier and beam foundation repair cost in Tallahassee?
Most pier and beam corrections run $4,000 to $15,000. Shimming and adjusting a handful of existing piers to take the bounce out of a floor lands at $4,000 to $7,000. Replacing failed piers, adding new footings, and sistering a sagging girder runs $8,000 to $12,000. Jobs that include rotted sill plate and joist end replacement along an exterior wall run $12,000 to $20,000, because the wood repair is labour-heavy and often uncovers more once the crew opens it up.
Why do the floors in my older Tallahassee home slope?
Three common causes, often together. Original piers were built on shallow footings that have settled unevenly into the soil. Girders spanning between piers have sagged under decades of load, especially where a wall or a heavy bathroom sits mid-span. And where the crawl space has stayed damp, joist ends and sill plates have lost section to rot. A crawl space inspection separates the three, which matters because the fixes and the prices are different.
Is a crawl space foundation worse than a slab?
No, just different. Raised foundations are far easier to inspect and repair because everything is reachable, and plumbing runs are accessible instead of buried in concrete. Their weakness is moisture: a damp, poorly drained crawl space will eventually cost you wood. Slabs have the opposite profile, less to go wrong day to day, but harder and more expensive to correct when the soil under them moves.
How level should an old house floor be?
Not perfectly. A hundred-year-old house that has settled slowly and evenly is doing what old houses do, and chasing a laser-flat floor in one can cause more damage than it fixes. What matters is the rate and pattern of change: a slope that has been stable for decades reads differently from a floor that has dropped half an inch in two years, and the second one is the one worth investigating.
Can floor re-levelling be done while we live in the house?
Usually yes. Most of the work happens under the house, and re-levelling is done gradually with small adjustments over a day or more rather than one big lift, specifically so finishes above have time to move with it. Expect noise, expect some hairline cracking in plaster and drywall where the floor comes back up, and expect the crew to need access to the crawl space entry for the duration.
Adjacent Work
What usually gets quoted alongside it
Foundation problems rarely arrive alone, because they usually share a cause. A house that needs piers on one side very often needs the drainage on that side corrected too, and the second job is what stops the first one repeating.
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Foundation Crack Repair
Sealing and structural stitching for cracks in slabs, stem walls, and masonry foundation walls
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Concrete Leveling and Slab Lifting
Polyurethane foam and mudjacking to raise sunken driveways, walkways, patios, and garage slabs
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Helical and Push Pier Underpinning
Deep steel pier systems that transfer house loads past the moving soil to competent bearing strata
More on ground conditions around Tallahassee
Find out what is moving under your house
Someone comes out, takes the elevations, walks the drainage, and writes you a price. Ring (850) 391-4290 or send the details through the form.