Q: Should I repair my driveway or just replace it?
Repair if the slab is structurally sound and the damage is isolated. That's most cases. Replace if more than 30 to 40 percent of the slab is broken, if there's deep subgrade failure that won't hold under a new slab, or if the original slab was poured too thin (under 3 inches) for the use it's getting. We'll tell you honestly when replacement is the better long-term spend, even though it's a bigger job.
Q: What is polyjacking and how is it different from mudjacking?
Both lift sunken slabs by injecting material underneath them. Mudjacking uses a cement-and-soil slurry pumped through 1.5-inch holes. It's cheaper but heavier (which can re-load weak subgrade) and the holes are visible. Polyjacking uses high-density polyurethane foam injected through 5/8-inch ports. It's lighter, sets in 15 minutes, the holes are nearly invisible after patching, and the foam doesn't wash out from irrigation or rain. We use polyjacking for most residential lifts.
Q: How long do crack repairs actually last?
Polyurethane crack injection on a properly routed crack lasts 10 to 20 years on a stable slab. Epoxy crack injection is structural, so it bonds the slab and lasts essentially forever as long as the cause of the original crack (settlement, root pressure) was addressed. The repairs that fail early are the ones where someone smeared caulk over an unrouted crack without cleaning it first. That's a 6 to 12 month repair at best.
Q: How soon can I drive on it?
Crack injection: foot traffic in 2 hours, vehicle in 6 to 8 hours. Polyjacking: vehicle traffic same day, the foam reaches full strength in 15 minutes. Saw-cut patch: 24 hours for foot traffic, 48 to 72 hours before driving on the patched area. Sealer cures in 4 to 6 hours and is rain-safe overnight. We give you specific times based on what we did and the weather.
Q: Can you match the color and texture of my existing concrete?
Close, not perfect. Concrete from the 1970s has oxidized, weathered, and changed color over 50 years. New patch concrete starts out lighter and darkens over 6 to 12 months as it cures and weathers. We match texture (broom finish direction, stamp pattern) carefully, and we use integral pigment and surface tinting to get the patch as close as possible. Sealing the whole driveway after the repair helps even out the visual difference.
Q: Do you handle stamped or decorative concrete repairs?
Yes, and they require more skill than plain gray concrete. We have the stamp mats and color hardeners to recreate common patterns (slate, ashlar, cobblestone, Roman seamless). Custom stamps may need to be sourced. Decorative repairs cost more per square foot than plain concrete repairs because of the matching work involved, but they save the entire decorative slab from replacement.
Q: Do I need a city permit to repair my driveway?
For in-kind repair on the private portion of the driveway, no permit is needed in most OC cities. Anything that touches the apron between the sidewalk and the curb is a different story. That portion is in the public right-of-way and requires an encroachment permit from the city public works department. We pull the permit when needed and handle the inspection scheduling. Cities like Newport Beach, Irvine, and Mission Viejo each have their own permit form and review timeline.
Q: How often should I sealcoat or seal my driveway?
Concrete driveways do well with a penetrating siloxane or silane sealer every 3 to 5 years. The sealer blocks moisture intrusion (the main driver of cracking and spalling) and slows oxidation from UV. Asphalt driveways need a different product (a coal-tar or asphalt-emulsion sealcoat) every 2 to 3 years. Sealing immediately after a repair locks in the patch and evens out the visual difference between new and old concrete.
Q: What causes the spalling and surface flaking on my driveway?
Three usual causes in OC. First, rebar corrosion, especially within a mile of the coast where chloride from salt air penetrates the slab and rusts the steel from the inside out. The expansion pops the surface off. Second, weak surface laitance from a slab that was over-troweled or had water added at the pour. Third, alkali-silica reaction in slabs poured with reactive aggregate, which we see occasionally in 1960s and 70s pours. The fix depends on the cause. Coastal spalling usually needs a partial replacement plus a chloride-blocking sealer. Surface laitance can be ground off and resurfaced.
Q: Will polyjacking work if my soil is expansive clay?
Yes, and it's actually a better choice than mudjacking on clay subgrades. Expansive clay (common in Yorba Linda, Anaheim Hills, and the Mission Viejo foothills) swells when wet and shrinks when dry, which is why slabs over clay heave and settle seasonally. The polyurethane foam is light (4 to 6 lb/ft³) compared to a cement slurry (around 100 lb/ft³), so it doesn't re-load the weak clay underneath. The foam also fills voids without absorbing water, so it stays stable through seasonal moisture swings.