Inspection under the house
Beams, joists, piers, shims and the ground itself are checked from below, along with anything that has rotted, split, crushed or come away from its bearing.
Crawl Space Repair
Older San Antonio homes raised on piers and beams have a crawl space underneath, and that is where most of their foundation trouble begins. San Antonio Foundation Fix gets under the floor to see what the beams, blocks, shims and ground moisture are doing before anything is priced.
- Upfront Quotes
- Slab & Pier and Beam
- Residential & Commercial
Signs From Under the Floor
- A floor that dips, springs or feels soft in one part of a room
- Musty air rising through the floor or drifting out of a vent
- Wet ground or standing water under the house days after rain
- Baseboards parting from the floorboards along one wall
- Insulation hanging loose between the joists or missing entirely
- Vents buried by soil, hidden behind shrubs or closed off by a later addition
What the Work Includes
No two crawl spaces are the same, so the scope follows the inspection underneath rather than a standard package.
Joist and beam repair
Timber that has decayed or split is replaced, or sistered where the original member can stay in place. A sound beam that has simply lost its support is a smaller job.
Resetting piers and shims
Piers that have settled are reset or rebuilt and crushed shims are renewed so the load sits where the house was designed to carry it.
Ground moisture and vapor barrier
A sheet barrier over the soil slows moisture rising into the timber. It is not a substitute for fixing the reason the ground is wet, but it makes a real difference once that is done.
Ventilation and access
Blocked vents trap damp air against the joists. Clearing them, and leaving a hatch that someone can actually get through, keeps the space serviceable in future.
Drainage at the perimeter
Grading, gutters and downspout runs get looked at in the same visit, because a crawl space that keeps refilling with water will undo the repair underneath it.
Your Options
The advantage of a crawl space is that the problem can be seen. On a slab everything has to be inferred from measurements, while under a raised floor you can put a light on the rotted beam and the crushed shim and know exactly what you are buying. That usually makes the repair more targeted and the quote easier to check.
Where the floor also has to come back up, foundation leveling describes how that is staged, and the broader pier and beam repair page covers the structure as a whole. Where the ground under the house stays wet, drainage correction is usually the first money well spent. If piers around the perimeter come into the conversation, the pier comparison explains the two types you are likely to be offered.
Many homes in the older inner neighborhoods have a raised original section with a slab addition attached later, and the two move at different rates. The Alamo Heights page looks at that pattern locally, and a foundation inspection establishes which part of your house sits on which system.
Crawl Space Questions
How do I know whether my crawl space needs repair?
Soft or sloping floors, a musty smell indoors and gaps at the baseboard are the everyday signs. None of them proves anything on its own, which is why San Antonio Foundation Fix looks underneath and measures the floor before quoting. Book a foundation inspection to start.
Can I jack up a sagging floor myself?
Please do not. Lifting part of a house without knowing where the loads run can crack walls, break lines under the floor or drop something on whoever is underneath. It also tends to move the problem rather than solve it. Leave lifting to someone who has measured the house first.
Does a crawl space in San Antonio need a vapor barrier?
Often, yes. Our clay soil holds water for weeks after heavy rain, and that moisture rises into joists and subfloor. A barrier over the soil helps, but only once the water reaching the crawl space has been dealt with through grading and drainage.
Is crawl space work cheaper than slab repair?
It can be, because the work is accessible and often localized to a few bearing points rather than the whole perimeter. It is not automatic, though: widespread rot or a full re-support costs more than a handful of piers on a slab. The written quote follows the survey either way.
Arrange a foundation inspection in San Antonio
Tell us what the floors are doing and whether there is a hatch we can get through, and we will plan the visit.