Concrete Raising & Leveling
Garage Floors
Seattle Garage Floor Re-Leveling
1-866-SLABJACK provides garage re-leveling and concrete raising services in the Puget Sound. The process of fixing your garage floors is a clean, simple procedure accomplished without expensive excavation or slab removal, and is usually completed in just one day. Level off floors, sinking and broken corners, eliminate cracks and restore your garage to a fresh new look. If you have noticed that your garage floors may be sloping or sunken – give our experts a call or schedule a free estimate here on our website. We provide local services to Seattle, Bellevue, Tacoma, Bothell, Redmond, Everett and beyond.
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Why Is My Garage Floor Sinking?
Garage floor settling is one of the most common concrete problems homeowners face in the Pacific Northwest — and it's almost always a soil problem, not a concrete problem. The most frequent causes include:
Soil erosion and washout. Heavy rainfall (something we know well in the Puget Sound) gradually washes away the compacted fill beneath your slab, creating voids that allow the concrete to drop.
Poor original compaction. Many garage slabs were poured over fill soil that was never properly compacted. Over time, that material shifts and settles under the weight of vehicles and foot traffic.
Tree root activity. Roots that grow beneath a slab and then die or are removed can leave significant underground voids.
Freeze-thaw cycles. Seasonal temperature swings cause soil to expand and contract, slowly displacing the material supporting your slab.
Whatever the cause, the result is the same — an uneven, potentially hazardous garage floor that gets worse the longer it's ignored. Early action is almost always less expensive than waiting.
How Does Garage Floor Slabjacking Work?
Slabjacking (also called concrete lifting or mud jacking) is a proven, minimally invasive technique for raising a sunken concrete slab back to its original position. Here's what the process looks like when our crew arrives at your home:
- Inspection and mapping. Our technicians identify the low spots, voids, and areas of instability across your garage floor.
- Strategic drilling. Small holes — typically the size of a golf ball — are drilled through the slab at carefully chosen injection points.
- Material injection. We pump a high-density polyurethane foam beneath the slab. The foam expands to fill voids, compacts loose soil, and lifts the concrete back into place with precision.
- Leveling and verification. Our team monitors the lift in real time to ensure proper, even elevation across the entire floor.
- Hole patching and cleanup. Injection holes are patched, the work area is cleaned, and your garage is ready to use again — usually within a few hours.
The entire process is completed without heavy excavation equipment, no concrete removal, and minimal disruption to your daily routine.
Polyurethane Foam vs. Traditional Mudjacking for Garage Floors
Not all slabjacking is the same. At 1-866-SLABJACK, we use polyurethane foam injection rather than traditional cement-based mudjacking slurry — and there are good reasons for that.
Polyurethane foam is lightweight (traditional mudjacking material can actually add significant weight to already-stressed soil), cures in minutes rather than days, and won't wash out or erode under the slab the way a slurry mix can over time. It's also cleaner, requires smaller injection holes, and provides a longer-lasting result.
For garage floors specifically — where vehicles are parking and the slab bears constant load — polyurethane is the better long-term investment. Learn more about Polyurethane vs. Mudjacking.
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