Crawl Space Repair in Nassauville, FL
Nassauville river homes, rebuilt where the damp climbed.
Off SR-107 on the tidal Nassau River, a shallow water table rots posts from the base and salt air eats the metal. We replace both and move the water away.
Crawl Space Repair in Nassauville
Why Nassauville homes need this, and how we do it
Nassauville runs along the tidal Nassau River off SR-107, southwest of Fernandina, on low oyster-shell and marsh ground. The water table is shallow, and the river keeps the air under these houses damp most of the year. Old river cottages and newer homes both show it. Posts and piers rot from the base up, rim joists on the water side soften, and salt air leaves straps and hangers flaking with rust.
We repair the framing from the ground up. Rotted wood posts are replaced with treated lumber on sound bearing, girder ends and rim joists are cut back to solid wood and rebuilt, and weakened joists are sistered or swapped. Soft subfloor is replaced from below. Corroded hangers, straps and duct supports come out and go back in as galvanized or stainless hardware, and moldy framing is cleaned and treated.
River ground stays wet, so the source work matters here. We lay a new vapor barrier over the dirt, pull out soaked insulation, replace broken vent covers and access doors, and add a sump or drain line where water pools after a high tide or storm. Encapsulation is available if you want the space sealed. Most Nassauville repairs take one to three days, with photos and a fixed written price.
What’s included
A real repair, from the sill plate up
Every crawl space repair we do in Nassauville, FL follows the same checklist. Every scope is itemized before we start. A typical crawl space repair includes:
- Probe and moisture readings to map every rotted member
- Temporary shoring so the floor is supported during the work
- Rotted sill plate and rim joist cut out and replaced with treated lumber
- Damaged joists sistered or replaced, soft subfloor replaced from below
- Mold on sound framing cleaned and treated
- Failed barrier, insulation, vents, access door or sump repaired or replaced
- Moisture source fixed and photo documentation before, during and after
What we won’t do
We will not paint over rot, we will not bolt new wood to framing that is still wet, and we will not leave the cause in place and call the repair finished. If the damage is small, the quote stays small.
What to expect
Four steps, start to finish
Free inspection
We probe the sill plates, joists and subfloor, take moisture readings, and photograph every soft or damaged member.
Written plan & price
You get each repair itemized with a fixed price, the moisture fix spelled out, and financing options.
Repair, 1–3 days
Our crew shores the floor, replaces the damaged wood and failed components, and fixes the moisture source.
Walkthrough & warranty
We walk you through the before and after photos and hand over the workmanship warranty in writing.
Crawl Space Repair in Nassauville
Questions Nassauville homeowners ask us
My house off SR-107 has a slope toward the river side, could that be rotted posts?
That's one of the most common causes out here. The river side stays wettest, so those posts rot first. We replace them and repair any girder or joist damage above.
Fiddler crabs and critters get under my Nassauville house, can you close it up?
We replace torn vent screens, broken vent covers and a rotted access door so the crawl space is closed to animals. Anything they damaged gets fixed too.
Is it worth repairing an old river cottage or should we tear it down?
A lot of them are worth saving. Rot is usually concentrated in posts, sills and rim joists, and replacing those can give the cottage many more years.
How often should I have someone look under my house this close to the marsh?
Once a year is a good habit on river ground, and after any big storm. Catching a rotting post early is a much smaller repair.
Will the new wood you put in rot just like the old wood?
We use treated lumber and fix the water that caused the rot, like pooling after tides or a torn barrier. That keeps the new framing drier and lasting a lot longer.
“Our floors had gotten soft and the whole downstairs smelled musty. They inspected the crawl space, showed us photos of the rot and moisture, and fully encapsulated it. The smell is gone, the floors feel solid, and our humidity finally stays under control.”
Free inspection · No obligation
Find out what's really happening under your Nassauville home
We measure, photograph and explain what we find - then give you one fixed written price. No pressure, and no obligation to book anything.
- Free inspection with a written report
- Fixed price before any work starts
- Our own trained crews - never subcontractors