Supplemental Beams & Jacks in Nassauville, FL
Nassauville floors, dry and firm underfoot.
River-adjacent Nassauville homes have damp crawl spaces that rot band joists and posts. New steel jacks and a supplemental beam bring the floor back solid.
Supplemental Beams & Jacks in Nassauville
Why Nassauville homes need this, and how we do it
Nassauville is a shrimp-boat and fish-camp community strung along SR-107 southwest of Fernandina, right at the edge of the Nassau River marsh. The ground here sits low and damp, and the crawl spaces under both the old river cottages and the newer builds hold that moisture close. Long girders carried on wood posts start to give as the posts rot at the base and the beams lose their bearing, and the floor above turns soft in the middle of a room.
We steady it with new steel. Adjustable jack posts go in on concrete footings that reach firm bearing below the wet surface soil, and a supplemental steel or engineered beam picks up the long spans the tired girders were carrying alone. Rotted posts and girder sections are cut out and replaced. The lift comes up slowly so plaster, trim and finished flooring stay intact.
When the steel is set the bounce is gone and the floor holds firm underfoot. Because the marsh-edge damp is what rotted the last supports, we usually pair the work with drying and sealing the crawl space, so the new steel and the wood around it are not left sitting in the same river moisture that took down the posts before them.
What’s included
The whole load path - not just the soft spot
Every supplemental beams & jacks we do in Nassauville, FL follows the same checklist. We support the framing that failed and the framing that is about to. A typical beam and jack scope includes:
- Elevation readings across the floor to find the real low point
- New poured concrete footings sized to the load and the soil
- Adjustable steel jacks set plumb and shimmed to bear evenly
- Supplemental beam under long or undersized joist spans
- Rotted or split posts, girders and joists replaced or sistered
- A slow, staged lift so plaster, tile and trim are not shocked
- Photo documentation before, during and after
What we won’t do
We will not stack blocks or shim on bare dirt, we will not crank a jack fast enough to crack your ceilings, and we will not put new steel under wet, rotting framing without telling you the moisture has to be dealt with as well.
What to expect
Four steps, start to finish
Free inspection
We read elevations across the floor, check every post and girder, and find where the support actually failed.
Written plan & price
You get the jack count, the beam length and any framing replacement itemized at one fixed price, with financing options.
Install, usually one day
Our crew digs and pours the footings, sets the steel, and brings the floor up in measured stages.
Walkthrough & warranty
We show you the after photos, re-read the elevations with you, and hand over the workmanship warranty in writing.
Supplemental Beams & Jacks in Nassauville
Questions Nassauville homeowners ask us
My Nassauville home is near the river with a damp crawlspace, are the band joists rotting?
That river-adjacent damp keeps the crawlspace moist, and damp band joists rot and go soft over time. We replace the bad supports with steel jacks on concrete footings and a beam, working from underneath.
The posts under my river-adjacent home look rotted, is the moisture the cause?
Very likely, the damp near the river keeps the wood posts moist until they rot from the base up. We set new steel jacks on poured concrete footings and a supplemental beam under the span to firm the floor.
Why does my band joist feel soft along the edge of the house?
A soft band joist near the river usually means moisture got in and started rotting the wood. We shore it with steel jacks on concrete footings and a beam so the floor edge stops giving, usually in a day.
Can you replace rotted supports in a damp crawlspace without disturbing my house?
Yes, it's all crawlspace work, so nothing up top gets touched while we set steel jacks on footings and a beam. Most Nassauville jobs are done in a single day.
How do I keep the river damp from rotting more of my floor supports?
The lasting fix is getting the load onto steel jacks and concrete footings that handle the moisture better than wood, plus a beam under the span. We'll do a free written inspection to show you where it's rotting.
“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