A patio that tilts back at the house is a foundation problem in training.

Patios have a shared origin story that explains most of what goes wrong with them. They are poured over the ground immediately outside the foundation, and that ground is backfill: the soil that came out of the excavation and went back in against the wall once the foundation was finished. Backfill is rarely compacted to the standard the untouched yard already has, so the strip nearest the house keeps consolidating for years, and the patio poured on top of it settles along that same strip.

The result is a rotation rather than a uniform drop. The outside edge, sitting on ground that was never disturbed, stays roughly where it was. The house edge goes down. The slab tilts back, and the fall that the original pour built in to move water away from the building quietly reverses. Catching that rotation early, while it is still a slab out of level rather than a structural story, is genuinely cheap insurance for the building behind it.

The word leveling is a slight misnomer on a patio, because a correct patio is not level. It falls gently away from the building so water leaves on its own, and the lift has to restore that fall rather than erase it. That is why the evaluation maps drainage alongside elevations: the target surface is a plane with a deliberate slope, and getting there means raising different sections by different amounts in a planned sequence.

The injection plan comes out of that target. Foam placed under the settled sections raises them in fine increments with readings taken between shots, and the crew stops each area at its own number rather than at a single flat elevation. Low spots that were holding water get particular attention, because a puddle is a patio's slowest leak: it soaks through the surface and any crack beneath it, feeding the very settlement that created the low spot.

A covered porch is a patio with structure on it, and that changes the plan. Where roof posts sit on their own footings that pass through the slab, the concrete can be lifted around them and the posts stay exactly where they are. Where posts bear on the slab itself, the slab is carrying a real load and the sequence has to account for it, because raising a loaded section is not the same job as raising an empty one.

Establishing which arrangement you have is part of the evaluation rather than a discovery made on the day. It also decides whether the honest answer is a lift at all: a porch slab dropping because the structure attached to it is settling is a foundation question, and lifting the concrete would leave the cause running. Because Dalinghaus does both kinds of work, the same free evaluation answers it either way, and the findings are yours in writing whichever direction it points. Where it is genuinely the slab, slab jacking under the settled sections is the whole of the repair.

A patio usually meets something at each end: a sliding door threshold, a set of steps down to the lawn, a walkway, a pool deck. Those junctions are where settlement is most visible and most annoying, because a step that was built at a comfortable height stops being comfortable when the slab under it drops half an inch. They are also where water gets in, since a separated joint is an open channel to the base.

Where the steps have moved with the patio, the steps get lifted in the same visit so the riser heights come back to what they were rather than being left as a new hazard. Where a patio runs into a pool surround, the same is true of the pool deck, and both are usually cheaper to do together than separately. The one thing not worth doing is correcting one side and leaving the offset to reappear on the other.

Not every tired patio needs lifting, and saying so is part of the job. If the elevations check out and the slope still drains away from the house, then wear, staining and fine surface cracking are surface problems with surface solutions, and they belong with concrete repair rather than with a lift. Cleaning, filling the minor cracks and sealing the surface against the moisture cycle is a much smaller project and often the correct one.

The reverse is worth saying just as plainly. A sealer is not a structural product and a coating cannot hold a slab up, so anyone selling one as the cure for movement is selling a delay. The evaluation exists to sort which patio you have before any money moves, and the concrete leveling solutions only get recommended where the measurements call for them. That is the same standard every concrete leveling project here is held to.