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Foundation Repair Baton Rouge is a foundation repair company with 20 years of industry experience, serving Baton Rouge and the Capital Region, and crawl space repair is how we protect the wood that holds up raised homes. The crawl space under a pier and beam house in south Louisiana is humid most of the year. When water pools there after rain, or damp air sits against the framing for months, sills and joists rot, termites move in, and floors start to sag.
Crawl space repair typically costs $3,000–$15,000. A sealed ground vapor barrier with drainage correction sits at the lower end; full encapsulation with a dehumidifier sits at the upper end.
What we do on the first visit
We go under the house with a moisture meter and a camera. We read moisture in the soil, the sills, the joists and the beams, note standing water or erosion, check insulation that has fallen or soaked through, and look at every pier and support. Upstairs, we take floor elevations. You get photos of what’s under your house — most homeowners have never seen it — and a written scope with options priced side by side.
Why crawl spaces fail here
Water and humidity. Yards that drain toward the house send runoff under it. Downspouts that discharge at the foundation wall do the same. Once the soil under the house stays wet, humidity in the crawl space climbs, and wood framing that sits above about 19–20% moisture for long periods decays. Homes that flooded in 2016 often had crawl spaces saturated for days, and some still show the effects in sill rot and sagging joists.
What we do about it
Water first: regrading and foundation drainage so runoff stops pooling under the house. Then a ground vapor barrier — 10 to 20 mil polyethylene, seams overlapped and taped, run up the piers — to stop soil moisture evaporating into the space. Where the scope calls for it, we go further with sealed vents and a dehumidifier. Damaged framing is repaired with treated lumber; soft floors get supplemental supports or sistered joists (see sagging floor repair).
Paperwork
You get before-and-after photos and moisture readings. Termite damage is a separate issue from moisture control, so we recommend a termite inspection by a licensed pest control operator alongside any crawl space work.
What's included
- Crawl-space inspection with moisture readings
- Photos of what we find under the house
- Written scope with options and prices
- Debris and old insulation removed as needed
- Drainage corrected so water doesn't pool
- Vapor barrier installed and sealed
- Supplemental supports and wood repairs as scoped
- Follow-up moisture check
Crawl space options compared
| DIY / patch it | Cheapest crew | Done properly | |
|---|---|---|---|
| Moisture control | None | Loose plastic on dirt | Sealed barrier + drainage |
| Wood damage addressed | No | Rarely | Repaired with treated lumber |
| Pooling water fixed | No | No | Yes — first step |
| Typical cost | $0 | $500–$1,500 | $3k–$15k |



