A gap along the wall base
The floor has dropped away from the foundation wall, leaving a visible line at the bottom of the drywall or block.
Traditional mudjacking in Northern Colorado since 2003 · 20,000+ slabs lifted
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Services / Garage and interior floors
Garage slabs, basement floors and shop floors lifted from inside, including gaps opening along the walls.
Interior slabs settle for the same reasons exterior ones do, and often worse, because the fill under a garage or basement floor was placed inside a foundation footprint and compacted around obstacles. When it drops, it takes the floor with it.
What makes interior work different is access and cleanliness. We are drilling inside your building, so hole placement, dust and cleanup all matter more. The slab also usually meets walls on several sides, which changes how it can move.
The signs are easy to miss because a garage floor is rarely something people look at closely. A gap along the base of the wall, a floor that slopes to one corner, or a crack that has opened up across the bay are all worth a call.
Any of these means the fill under your floor has moved.
The floor has dropped away from the foundation wall, leaving a visible line at the bottom of the drywall or block.
Unsupported concrete cracks where it spans a void, usually running across rather than along the slab.
Set something round down and see where it goes. Interior slabs should be close to flat.
A step forming between the driveway approach and the garage floor, in either direction.
Not always the slab, but worth investigating when it appears alongside floor cracking.
The same drummy note you get outside, telling you there is air rather than base beneath the concrete.
Interior lifting is the same method with more care around the edges. We plan hole placement to keep it out of the middle of a visible bay where possible, protect what is around the work area, and clean up the drilling residue as we go.
Load matters here too. A garage floor takes vehicle weight daily and a shop floor may take equipment, so the void gets packed thoroughly rather than just enough to raise the slab.
The one thing worth setting expectations on is the patches. On a bare or sealed garage floor they are visible. If your floor is coated or finished, tell us at the estimate, because that changes the conversation about where the holes go and what the finish will look like afterwards.
Interior work and the measurements behind it.
An interior concrete floor with a gap opening along the wall base.
An interior stairwell and work area during a job.
Before: measuring the void under a settled slab at the foundation.
Measuring slab settlement before lifting it back to grade.
Cracking at a garage approach, often the exterior half of the same problem.
A finished lift bringing a slab back level against the structure.
Can you lift a garage floor without moving everything out?
We need clear access to the area being lifted, so anything sitting on that part of the floor has to move. It does not have to be the whole garage if we are only working one section.
Will it be dusty?
There is drilling, so there is some dust. We keep it contained and clean up as we go, but it is worth knowing in advance if the space is finished or full of stored belongings.
My garage floor is coated. Should I still lift it?
Tell us at the estimate. The lift itself works fine, but the injection holes will interrupt a coating and the patch will not match it. Sometimes that is acceptable and sometimes it changes the plan.
Is the gap at the bottom of my garage wall serious?
It means the slab has dropped away from the foundation. It is not a structural failure of the house, but it is a clear sign the fill beneath the floor has settled, and it lets water and pests in.
Do you do basement floors?
Yes. Access is the main constraint, since we have to get hose to the work area, but basement slabs are normal work for us.
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