Slab Lifting & Leveling in Washington & Oregon
A sunken slab signals a void underneath. We fill them and lift the slab back to level with polyurethane foam, no demolition required.
Signs your slab needs lifting
A concrete slab doesn't sink on its own. When it drops, something beneath it has eroded, washed out, or compressed, and that void can keep growing until it's addressed.
Slab lower than the concrete beside it
A step-down where two slabs meet, whether that's a trip hazard at the walk, a lip at the garage, usually means one panel has settled while the other stayed put.
A crack with a height difference
A crack on its own may be cosmetic, but when one side sits higher than the other, the slab has dropped unevenly, likely indicating a void under one section.
Doors dragging in a slab-on-grade home
In a home on a slab foundation, a door that suddenly drags at the bottom is often the slab dropping below the frame's original elevation.
Water pooling toward the structure
Concrete that should slope away but now holds water, or sends it toward the foundation, has settled enough to reverse its original grade.
A visible gap at the slab edge
If you can see space between the slab and the soil at its edge, there's a void, and it will likely keep growing as water moves through it.
Cracked, uneven garage or driveway
Driveways, garage floors, and patios settle the same way interior slabs do. Lifting restores them before the cracking spreads.
Not sure if it's the slab or something below it? We confirm the location of the void and the cause before we inject. Book a free inspection today for an honest assessment of your sinking concrete slab.
What causes concrete to sink?
Slabs sink because the material beneath them has moved. The concrete itself is almost always fine as long as it's still in good shape, meaning not too cracked or deformed.
Soil erosion from water movement
Water running beneath the slab gradually carries soil particles away, creating a void. The slab loses its support and drops into the gap.
Poor original compaction
Many slabs were poured over fill that was never properly compacted. That fill keeps compressing under load for years after construction.
Plumbing leaks beneath the slab
A slow leak from a pipe under the concrete can quietly erode the surrounding soil for months before anything shows above ground.
Expansive clay movement
Clay that swells and shrinks with moisture can heave the slab during wet seasons and leave a void when it dries and compresses.
How Ram Jack West fixes it
Polyurethane foam injection lets us lift and level a slab without tearing it out. We drill small ports, inject expanding foam to fill the void and raise the panel, then patch the ports. Most jobs are done in a few hours and the slab is walkable almost immediately.
✓ Polyurethane foam injection to fill voids and restore the slab to level. fast, lightweight, and waterproof.
✓ Interior slabs, garage floors, driveways, patios, and any concrete tied to the structure.
✓ Void diagnosis before lifting irm where the void is and what caused it before we inject.
✗ Detached public sidewalks or walks unrelated to your homewe have referral partners who are more competitive on that scope.
✗ Full slab demolition and replacement the concrete itself is structurally compromised, that's a concrete contractor.
Our process
Four steps. Slab lifting is one of the fastest fixes we do — often finished in a single visit.
Schedule
Book your free on-site evaluation online or by phone. No commitment required.
Inspect
A specialist confirms the location and cause of the void, not just the visible dip.
Lift
We inject expanding foam to fill the void and raise the slab to level, then patch the ports.
Warranty
Backed by our workmanship warranty, the slab is usable almost immediately.
Why Washington & Oregon homeowners choose us
We've operated in this region for over 25 years and repaired more than 5,000 structures across Oregon and Washington. We know the soils, the weather, and the building stock.
Best-in-Class Warranty
Slab lifting and leveling projects come with a best-in-class workmanship warranty. However, because we aren't addressing soils deeper under the surface, a lifetime transferrable warranty does not apply to slab lifting projects.
Local Offices, National Resources
We operate out of SeaTac, Happy Valley, and Eugene — your inspector is local to your market. We pair that with Ram Jack's national R&D and patented products.
Cause-First, Not Cosmetic
We diagnose the void and what created it before we lift, so the slab stays level instead of re-settling in a year.
Common questions
Real questions homeowners ask, answered directly.
How does lifting compare to full replacement?
Slab lifting typically costs a fraction of demolishing and repouring concrete. It's also faster: most jobs finish in one day, with minimal curing time, so you're not waiting a week to use the space.
How long does lifted concrete last?
Polyurethane foam is waterproof and doesn't compress or wash away like soil. Once the void is filled and the root cause is addressed, results are long-lasting. We confirm the cause at inspection so lifting is the right call.
Will lifting fix the crack?
Lifting addresses the cause of the crack: the void and the height difference. The crack itself may stay visible, but once the slab is level and stable, we can drastically slow the rate of growth, if not eliminate it all together.
What if there's a pipe under my slab?
We can work around existing utilities. If a plumbing leak caused the void, we'll flag it so you can repair it before we lift, otherwise the problem recurs.
Not sure if this is your issue?
Book a free evaluation, and we'll tell you exactly what's going on. Zero obligation, no pressure, and no invented problems. We'd rather tell you it's nothing than sell you something you don't need.
