What Is Hydraulic Jacking? How We Safely Lift an RGV Home

April 1, 2026· 7 min read

Hydraulic jacking is the core technique behind every house leveling — here's how synchronized jacks lift a Rio Grande Valley home back to true without cracking the walls above.

If you've ever wondered how a 2,000-square-foot home actually gets lifted off a sunken foundation without the walls coming apart, the answer is hydraulic jacking — and specifically, synchronized hydraulic jacking. It's the single most important technique in house leveling, and it's what separates a clean lift from a cracked-up disaster.

Here's exactly what it is, how we use it on every RGV job, and why it's safe.

What Hydraulic Jacking Actually Is

A hydraulic jack uses pressurized fluid (usually oil) to multiply force. A small pump on one end pushes fluid into a cylinder on the other end, which extends a ram. That ram can lift tens of thousands of pounds with very precise control over how far and how fast it moves.

In foundation work, we place these jacks at engineered points under your home — on top of newly installed reinforced concrete piers (for slab homes) or under main beams (for pier-and-beam homes). Pump the jacks, and the home rises.

The trick isn't the jack itself. The trick is synchronizing many jacks at once.

Why Synchronization Matters

A typical RGV house leveling uses anywhere from 6 to 20+ hydraulic jacks at the same time. If one corner rises faster than another — even by half an inch — the framing above gets twisted. Drywall cracks. Tile pops. Door frames rack out of square.

Synchronized hydraulic jacking solves this. All jacks are connected to a coordinated control system, and we lift the entire home in 1/8-inch increments, checking elevation across the structure between each lift. The home rises as a single rigid body, so the framing doesn't see the differential stress that causes new damage.

This is why we always say: it's not the lift that cracks a house. It's an *uneven* lift.

How a Lift Day Actually Goes

Here's the sequence on a typical slab home:

1. Setup. Jacks are placed on top of the new reinforced concrete piers, one per pier, around the perimeter and at any interior load points. 2. Manometer mapping. We re-read elevations across every floor of the home so we know exactly where we're starting and where we need to get to. 3. First lift. All jacks pump together to bring the lowest corner up 1/8 inch. We re-check elevations. 4. Repeat. We lift in 1/8-inch increments, walking the inside of the home between each lift to watch for stress, listen for cracking, and verify everything is moving together. 5. Final lock-off. Once the home is at the maximum elevation it will accept without new damage, brackets are permanently locked to the piers and the jacks come out.

A typical lift takes 4 to 8 hours. The actual movement is measured in inches, but it's accomplished in dozens of tiny, controlled steps.

"Will the Lift Crack My House?"

This is the question every homeowner asks, and the honest answer is: a small amount of cosmetic movement is normal, and a properly synchronized lift minimizes it. Most jobs see a few hairline cracks at door corners or in older drywall — easy patches. The structural framing comes through fine because the load is moving as one piece.

What causes real damage is the *opposite* of what we do: a crew with a single jack working corner-to-corner, lifting one part of the house while the rest stays put. That's how walls crack. Synchronized jacking is specifically designed to prevent it.

Hydraulic Jacking vs. Other Lifting Methods

You may hear about a few alternatives:

Mudjacking pumps a cement slurry under a sunken slab to lift it. Good for sidewalks and driveways; not used for lifting an entire home.
Polyurethane foam injection uses expanding foam under interior slab sections. Fast and clean for small interior settlement, but not a structural lift.
Manual screw jacks are used in some pier-and-beam crawlspaces for small adjustments, but they can't be synchronized across an entire structure.

For lifting an actual house — slab or pier-and-beam — synchronized hydraulic jacking is the standard, and for good reason.

Where Hydraulic Jacking Fits in Our Services

Hydraulic jacking is the lifting step in almost every job we do: - Slab foundation repair — lifts the slab onto new reinforced concrete piers - Pier-and-beam repair — lifts the structure so we can replace sills and shim piers - House leveling — the core technique for restoring level - Wood-to-concrete conversion — lifts the entire home off its old piers so we can pour a new slab underneath

It's not a separate service. It's the engine that makes all of those services possible.

Frequently asked

Is hydraulic jacking safe for an old house?

Yes — when it's synchronized. The risk to old plaster, drywall, and tile comes from uneven lifting, not from the lift itself. We lift in 1/8-inch increments across all jacks at once so the structure moves as a single rigid body.

How much can hydraulic jacks lift?

Each jack we use is rated for tens of thousands of pounds, and we run multiple jacks simultaneously. A typical RGV home weighs 100–200 tons; the synchronized array is engineered to lift it with a comfortable safety margin.

Can you lift my home back to perfectly level?

Sometimes. On older homes, finishes have settled into the dropped position over decades. Lifting too aggressively can crack things that have been stable for years. We lift to the maximum the structure will accept without new damage — usually within 1/2 inch of true level.

How long does the actual lift take?

The lift itself is typically 4 to 8 hours, broken into dozens of small synchronized increments with elevation checks between each. The full job — including pier driving and lock-off — runs 2 to 5 days.

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