Patio and Pool Deck Leveling in Billings
Two patterns, and both start with water
Settlement away from the house. A patio poured against a foundation sits partly on backfill — soil returned to the excavation and never compacted the way undisturbed ground is. It consolidates for years. The outer edge, over deeper backfill, drops further than the inner edge, and the slab tips away from the wall or opens a gap at the joint.
The downspout corner. A single downspout concentrates the roof of an entire elevation into one square foot of soil, every storm. In a semi-arid valley averaging 14.3 inches a year, that one spot may see more water in an afternoon than the rest of the yard sees in a month. Settlement here is local, sharp, and usually obvious once you look up.
Drainage is the target, not flatness
It is tempting to define success as a level slab. On a patio against a house it isn’t. You want water leaving the building, which means a deliberate fall away from the wall. Before any material goes in, the finished plane needs deciding — otherwise a technically perfect lift produces a slab that ponds at the foundation and feeds the same soil that failed.
The same logic applies to the joint between a patio and a driveway or walk. Getting the elevations to agree is only useful if the resulting surface still sheds.
Pool decks: weight near a shell
A pool deck sits over backfill placed around the shell, in ground that is also carrying the pool itself and its plumbing runs. Fill weight is the number to look at: polyurethane foam is 2 to 8 pounds per cubic foot; mudjacking slurry is 100 pounds per cubic foot and up (HMI; Superior PolyLift). Where soil failed partly because it could not carry load, adding that mass is a decision, not a detail.
Foam also returns the deck to use in about 15 minutes through 5/8 inch ports, against 24 to 48 hours and 1 to 2 inch holes for mudjacking. Mudjacking still wins on very large voids where bulk fill is simply cheaper, and on low-stakes yard pads.
What it costs in this market
Published national ranges put patio leveling at $900 to $3,500 and pool deck leveling at $1,500 to $4,400 (A-1 Concrete). In Billings, ProMatcher reports $5.01 per square foot for slab leveling and mudjacking in ZIP 59102, within a $4.50 to $5.52 range; typical residential jobs here land between $500 and $2,500.
Ranges are published market data, not our quote. Yours depends on lift height, void volume, access and method.
Full cost ranges for this marketQuestions about this work
- Should the patio end up perfectly flat?
- Usually not. A patio against a house should carry a deliberate slope away from the foundation so water leaves rather than pools at the wall. Lifting it dead flat can send runoff back where it does the most harm.
- Is it safe to lift concrete right next to a pool?
- It is routine work, but fill weight is a real consideration near a shell and its plumbing. Polyurethane foam weighs 2 to 8 pounds per cubic foot against 100-plus for slurry, and the injection ports are 5/8 inch rather than 1 to 2 inches.
- My patio pulled away from the house. Is that the same problem?
- Usually yes. The strip of soil against the foundation is backfill, it consolidates for years, and any water that lands there speeds it up. The gap is the patio settling, not the house moving away.