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Concrete finishers floating a freshly poured residential driveway slab

Residential

Concrete Work in the South Bay

Driveways, slabs, foundations, walkways, and steps for South Bay homes and commercial sites — with the subgrade and reinforcement done properly.

Why concrete work

What Goes Under the Pour Decides How Long It Lasts

Concrete that cracks and settles early almost always failed underneath. Subgrade that was not compacted, reinforcement that was laid on the ground instead of chaired up into the slab, or a pour thinned to save a yard of material will all produce the same result a few winters later.

South Bay soils make this specific. Parts of Torrance and the inland flats carry expansive clay that swells and shrinks with moisture, moving anything sitting on it. The Palos Verdes peninsula adds slope stability to the picture, and structural work in landslide-sensitive areas carries geotechnical requirements that go well beyond a standard flatwork permit. We establish which conditions apply before quoting, because it changes the reinforcement schedule and sometimes requires engineering.

Control Joints Are Not Optional

Concrete will crack; the only question is whether it cracks where you chose. Control joints cut at the right spacing and depth — roughly a quarter of the slab thickness, laid out to the geometry rather than sprinkled evenly — give the shrinkage somewhere to go. Re-entrant corners around a garage apron or a step are where uncontrolled cracks reliably start.

What We Pour

  • Driveways, aprons, and parking pads, thickened and reinforced for vehicle loads.
  • House slabs, garage slabs, and equipment pads.
  • Foundations, footings, stem walls, and caissons on hillside sites.
  • Walkways, patios, steps, and ADA-compliant ramps.
  • Compacted subgrade, base rock, vapour barrier, and chaired reinforcement.
  • Broom, smooth, exposed aggregate, and stamped finishes.
  • Demolition and disposal of failed existing concrete.

What you get

Everything we deliver.

  • 01

    Foundations & structural slabs

    Spread footings, mat foundations, post-tensioned slabs, structural slab-on-grade with proper rebar placement, vapor barrier, and curing. Engineered to the structural drawings, not eyeballed.

  • 02

    Tilt-up panel construction

    Site-cast concrete tilt-up panels for warehouses, distribution, and light industrial — the fastest path to a commercial shell across LA County.

  • 03

    Driveways, parking lots, & sidewalks

    Parking lot pours with proper sub-base, drainage, joints, and ADA-compliant slopes. City sidewalk replacement coordinated with the AHJ.

  • 04

    Decorative & architectural concrete

    Stamped, stained, exposed-aggregate, polished concrete floors for retail, restaurants, and office. The look people want in modern commercial spaces.

  • 05

    Retaining walls & site walls

    Engineered retaining walls (over 4 ft require structural plans), site walls, trash enclosures, planter walls. Common requirement on hillside South Bay commercial sites.

How we run it

Scope to sign-off.

  1. 01

    Survey & shop drawings

    Field survey, layout, shop drawings for any structural concrete. Coordinate with the structural engineer of record before any rebar is bent.

  2. 02

    Form & rebar

    Forms set to elevation, rebar placed per drawings, embeds and chairs in position. Pre-pour inspection passed before concrete arrives on-site.

  3. 03

    Pour, finish, & cure

    Concrete delivered to the right mix and slump, placed with vibration to consolidate, finished to specified texture, cured per manufacturer (typically 7 days minimum). No water added at the truck.

  4. 04

    Strip, seal, & sign-off

    Forms stripped at proper cure, surface sealed if specified, joints sealed, walk-through with the GC. Cylinders broken at 7- and 28-day for structural sign-off.

Why DECOMA

One license, three disciplines, forty years.

Family-run South Bay general contractor since 1978. We design, build, and manage — under one license — so the team you start with is the team that hands you keys and the team that answers the phone when something needs fixing in year ten.

Years building
48+
Projects delivered
3,000+
Repeat clients
300+
CSLB Class
A/B

FAQ

Common questions.

How long does commercial concrete take?
Parking lot replacement: 1-3 weeks depending on size and phasing. Structural slab for a new building: 2-4 weeks of form/rebar work plus a single pour day. We typically work in 5,000-10,000 sq ft pour areas to stay manageable.
Can you pour concrete on occupied commercial sites?
Yes. Phased pours, after-hours and weekend work, dust and noise control. We've poured parking lots, sidewalks, and ADA upgrades on occupied multifamily, retail, and office sites across the South Bay without losing tenant operating days.
What about ADA-compliant sidewalk and parking?
ADA Standard 4.5 controls slope (1:48 max running, 1:50 cross), and we hit it. Every cure-out we walk with a level. The path-of-travel work passes the city accessibility inspector — we don't leave until it's signed.
Do you handle concrete repair or just new pours?
Both. Spall and crack repair for parking decks, structural concrete restoration on older South Bay industrial buildings (we worked on McDonnell Douglas and similar), expansion joint replacement. We diagnose the cause before patching.
What's the warranty on commercial concrete work?
Two-year workmanship warranty from DECOMA. Manufacturer warranty on any specialty product (sealers, dyes, hardeners). Structural concrete carries the design engineer's stamp — we install to that spec, the engineer warrants the design.
Are you licensed for commercial concrete work?
Yes. DECOMA holds CSLB Class A (General Engineering) and Class B (General Building) license #375508 — the Class A is specifically the license California requires for major concrete and earth-moving work. Bonded and insured for commercial scope.

Service areas

Concrete work across the South Bay.

Born in Harbor City, working across LA County since 1978. Same crew, same license number, same shop at 25941 Frampton Ave, Harbor City.

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Talk to a contractor

Tell us about your project.

One business day for a scope, timeline, and budget range. CSLB #375508 A/B.

Request consultation(310) 418-0258