Lifting puts the slab back. Grading and drainage keep it there. A lift without a water fix is a repair with an expiration date — here's how to regrade, extend downspouts, and read your yard's water story so the slab stays level.
This is the single most important thing to understand about concrete lifting, and the one most often left unsaid. When a crew lifts your driveway, they pump material into voids under the slab and raise it back to grade. What they do not do — unless you ask, and unless the quote includes it — is change anything about the water that created those voids. The downspout still discharges at the slab edge. The yard still slopes toward the patio. The sprinkler still blasts the joint. And water, given time, will do again exactly what it did before: wash fines out from under the slab, saturate clay soils until they shift, and open new voids under a slab you just paid to level.
That is why experienced contractors talk about drainage before they talk about price, and why a quote that never mentions water should make you suspicious. The settlement story on most Salt Lake Valley lots is a water story first and a soil story second: a roof's worth of rainwater concentrated at one slab edge, a yard graded flat (or worse, toward the house) when the home was built, an irrigation line leaking quietly for a season. The downspout and drainage guide works through the usual culprits in detail; this article is about what to do after the lift, so the fix holds.
The order of operations matters. Lift first, then grade — because grading to a sunken slab means grading to the wrong height, and you will regrade again after the lift anyway. But plan the grading before the lift, so the crew knows what is coming and so the drainage work starts the moment the lift cures rather than months later, after another wet season has had its say.
Before buying soil or extensions, spend one rainstorm watching. Seriously — stand at a window during a good downpour and trace where water goes. You are looking for four things:
Also check the small stuff: sprinkler heads spraying onto concrete or into joints, a hose bib dripping at a slab edge, a condensate line or sump discharge pointed at the ground beside a patio. Each is a slow, steady water source doing quiet damage between rainstorms. Fixing a sprinkler head costs nothing and can matter as much as a regrade.
Regrading means reshaping the soil around the slab and the foundation so water runs away from both. For most residential lots, it is a homeowner-scale job: topsoil (not mulch, which holds water against the house), a wheelbarrow, a rake, and a level or a string line to check the fall. Build the soil up near the house and feather it out over the first several feet, so the fall is smooth rather than a ridge. The test is a rainstorm, or a bucket of water poured at the foundation: it should sheet away, not pool within a few feet of the wall.
Three cautions keep a regrade from creating new problems. First, do not pile soil above the slab surface or against wood siding — soil against siding rots it and invites pests, and soil above the slab edge dams water onto the slab instead of away from it. Second, do not bury weep holes, vents, or the bottom of a stucco or brick veneer; those openings exist for a reason. Third, do not compact fresh fill with heavy equipment right against a newly lifted slab — hand tamping is the right scale, and the fill will settle a little on its own, so overfill slightly and recheck after a few rains.
Timing: surface drainage work (extensions, splash blocks, gutter cleaning) can start immediately after a lift — none of it touches the injected material. Soil regrading against the slab edge should wait for the cure window: same day for foam, about 24 hours for mudjacking. Sealing joints and cracks follows the same windows. If the regrade involves a retaining wall, a swale, or major reshaping, bring in a landscaper and let the lift cure fully first; that work moves real weight around, and a fresh lift deserves a few days before anything heavy rolls across it.
If you do one drainage thing after a lift, make it downspout extensions. A single downspout can deliver hundreds of gallons from one roof plane in a good storm, and when that water discharges at a slab edge, it concentrates all of that erosive force onto one patch of soil — the patch that just failed. Extensions carry that water several feet past the slab, onto ground that slopes away, and they cost very little: rigid or flexible pipe, a splash block or a buried line daylighting downhill, and an afternoon of work. Burying the line is tidier and avoids a trip hazard, but an above-ground extension that actually gets installed beats a buried system that stays on the someday list.
Check the gutters at the same time. A clogged gutter overflows at exactly the wrong place — usually right above a slab edge or a foundation corner — and a gutter that sags or pulls away dumps water behind the fascia and down the wall. Gutter cleaning is unglamorous and, in the Salt Lake Valley, a twice-a-year job (after spring seed drop and after fall leaf drop). It is also the cheapest settlement prevention there is. The full downspout picture, including sizing and where extensions should daylight, is in the downspout and drainage guide.
Tell us what's sinking and where the water comes from — downspouts, yard slope, sprinklers — and we'll quote the lift and flag the drainage fixes that protect it.
Some lots have water problems that extensions and a wheelbarrow of topsoil cannot solve. A yard that slopes toward the house from the street, a low corner that collects runoff from several lots, or a neighbor's regrade that now sends water across your property line — these need interception, not just redirection. The two standard answers are a swale (a shallow, grassed channel that carries sheet flow around the house to a safe outlet) and a French drain (a gravel-filled trench with a perforated pipe that collects subsurface and surface water and carries it away). Both are landscaper or drainage-contractor jobs, both need a real outlet (a street gutter, a dry well, a downhill grade — not a neighbor's yard), and both are worth pricing when the water story is broad rather than point-source. A French drain to solve a downspout problem is overkill; extensions to solve a yard-wide drainage pattern are underkill. Match the fix to the water.
Neighbor flow deserves a practical note. Start with the facts — photos after a storm, a clear description of where the water comes from and where it pools — and a conversation. Most drainage disputes resolve when the neighbor sees the problem, and a shared swale or a small berm on the line often serves both lots. If the flow crosses a property line and causes damage, local rules may come into play, but the practical first step is nearly always a conversation, not a complaint, and a swale or drain on your own side of the line can intercept the flow without anyone else's permission.
The bottom line is a sequence, not a single purchase: lift the slab, fix the water, seal the joints, and then watch one rainstorm and one winter. A lift protected by drainage is a repair measured in decades; a lift without it is a repair measured in wet seasons. Pricing for the lift itself is unchanged — mudjacking $3–$8 per square foot, foam $5–$25 per square foot, most residential jobs $500–$3,000 total, tables in the cost guide — and the drainage work around it is mostly homeowner-scale, which is the best kind of insurance: cheap, visible, and verifiable the next time it rains.
No — and this is the most important misunderstanding in concrete lifting. Lifting restores the slab to grade; it does not fix the water that undermined it. If a downspout was dumping at the slab edge, the soil will wash out again. If the yard slopes toward the slab, water will keep pooling on it. A lift without a drainage fix is a repair with an expiration date. The lift and the drainage fix are two halves of one job, and a contractor who quotes only the lift without asking about water is selling you half a repair.
The ground around the foundation should fall visibly away from the house for the first several feet — enough that water from rain and sprinklers runs off rather than sitting against the wall or the slab edge. The practical test is a rainstorm: water should sheet away from the house, not pool within a few feet of it. If you see pooling against the foundation or the slab edge after a storm, the grade is wrong regardless of what any measurement says. Regrading means adding soil (not mulch, which holds water) to build that fall, and it is usually a homeowner-scale job unless the yard needs major reshaping.
Almost always, if you do not have them already. A downspout that discharges at the foundation or slab edge concentrates an entire roof's worth of rainwater onto one patch of soil — the single most common cause of settlement we see in the Salt Lake Valley. Extensions that carry water at least several feet past the slab, onto ground that slopes away, remove that concentrated flow. They are cheap, they are a homeowner-afternoon job, and they do more for the life of a lift than almost anything else. Our downspout and drainage guide covers sizing and placement.
Not if it is done sensibly. Regrading adds soil against the slab edge and the foundation — it does not disturb the material injected underneath. The cautions are simple: do not pile soil above the slab surface or against wood siding, do not bury the slab edge so deep that water sits against it, and do not compact fresh fill with heavy equipment right against a newly lifted slab. Hand tools and a wheelbarrow are the right scale for most residential regrades. If the regrade involves a retaining wall, a swale, or significant reshaping, that is a landscaper's job, and it should wait until the lift has cured.
Surface work — downspout extensions, splash blocks, gutter cleaning — can happen immediately; none of it touches the slab or the injected material. Soil regrading against the slab edge is best done after the lift has cured: same day for foam (15–30 minute cure), after about 24 hours for mudjacking. Sealing joints and cracks follows the same windows, and the full aftercare routine is in sealing concrete after lifting. The one thing not to rush is heavy work — no loaded wheelbarrows or equipment rolling across a mudjacked slab before its cure window closes.
That is a grading problem with a diplomacy problem attached. Start with the facts: where the water comes from, where it pools, and photos after a storm. Many neighbors will cooperate on a swale, a berm, or a shared drainage fix once they see it. If the water crosses a property line and causes damage, local rules may apply — our sidewalk responsibility guide touches on how Salt Lake Valley jurisdictions split drainage duties — but the practical first step is almost always a conversation, not a complaint. A French drain or swale on your side of the line can also intercept the flow without anyone else's permission.
When the water problem is broad rather than point-source, yes. Downspout extensions fix a roof's worth of water at one spot; a French drain (a gravel-filled trench with a perforated pipe) intercepts sheet flow across a yard — a slope draining toward the house, a low corner that collects the whole street's runoff. It is a bigger job than extensions, usually a landscaper's or drainage contractor's, but on a lot with a genuine drainage pattern problem it is the fix that makes the lift permanent. If the only water source is a downspout, extensions alone are enough — do not buy a drain to solve a downspout problem.