Crawl Space Repair in Henderson, NV
A sagging floor over a crawl space almost always means the floor joists have lost support underneath — from a failed post, a rotted beam, or soil movement under the crawl space itself. Crawl space repair restores that support and, where needed, seals the space against moisture.
- Licensed Nevada contractor (NSCB A-9)
- Floor joist support and crawl space encapsulation
- Free crawl space inspection before any repair
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Please call us at (702) 819-6601.
Sagging Floors & Floor Joist Support
Crawl space jacks and new floor joist supports fix the most common issue we see: a section of floor that's noticeably springy or visibly sagging because the original support post or beam has failed. On pier-and-beam homes, this is often tied to the same soil movement that affects the rest of the foundation — expansive clay that swells and shrinks with moisture can shift a support post out of plumb the same way it moves a slab.
Crawl space encapsulation with a moisture barrier is a separate, often paired service — it doesn't fix a structural sag on its own, but it slows the wood rot and pest issues that make future sagging more likely.
A sag confined to one room, especially a kitchen or bathroom carrying extra plumbing and fixture weight, often points to a single overloaded joist rather than a foundation-wide problem. A sag that spans several rooms is more likely tied to the crawl space's overall support system underneath, and it's worth a full look rather than a single spot fix.
What's Included
Free crawl space inspection
We check joists, beams, posts, and moisture conditions to find the actual cause of a sag.
Floor joist support
New jacks and posts installed to correct sagging and stop further movement.
Crawl space encapsulation
Moisture barrier installation to reduce rot and pest risk under the home.
Permit handling
We file with the City of Henderson Building and Fire Safety Department where structural work requires it.
Our Process
How We Fix a Sagging Floor
Free On-Site Inspection
We check joists, beams, posts, and moisture conditions from underneath to find the actual cause of the sag.
Support & Permit
New jacks or posts are sized to the load, and we file with the City of Henderson Building and Fire Safety Department where the scope requires it.
Install & Verify
Supports are installed and the floor is rechecked for level before we call the job done, with encapsulation added if you want it.
Where We Work
Serving Henderson and the Las Vegas Valley
Older pier-and-beam homes see this most often, but any home built on Henderson's valley fill soils can develop a sag as the ground beneath the crawl space shifts.
Common Questions
Frequently Asked Questions
What causes a sagging floor over a crawl space?
Most often a support post or beam under the crawl space has failed or shifted, sometimes from age and sometimes from soil movement. Expansive clay that swells and shrinks with moisture is a common contributor to that kind of shift in Nevada.
Is crawl space encapsulation the same as crawl space repair?
No — encapsulation adds a moisture barrier to slow rot and pests, but it doesn't fix a structural sag by itself. If a floor is already sagging, joist or post repair comes first; encapsulation is often added afterward to protect the fix.
How will I know if there is an issue with my crawl space?
A springy or sagging floor, a musty smell in the home, or visible sagging when you look under the house are the clearest signs. Any of these is worth a free inspection before the support fails further.
Do I need a licensed contractor for crawl space structural repair?
Structural work under the house — replacing joists, posts, or beams — falls under Nevada NSCB classification A-9, Piers and Foundations, the same classification that covers foundation repair generally. Basic encapsulation work alone may not require the same classification, but confirm a contractor's license before hiring for any structural fix.
Can a crawl space be fixed without replacing the whole floor?
Yes — in almost all cases only the failed joist, post, or beam needs replacing, not the entire floor system. We isolate the specific failure point during the inspection and replace just what's needed, which keeps the job faster and less invasive than a full floor rebuild.