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Quikrete Home Additions & ADU: The Long Beach Owner’s Guide
We install home additions and ADUs in Long Beach with Quikrete-based concrete foundations, slabs, and footings, typically running $45,000 – $130,000 installed. The way most homeowners discover a problem is not dramatic – it shows up as a hairline crack running across the garage slab, moisture wicking up through a Quikrete pour that was not properly cured, or a door frame that starts binding because the concrete underneath shifted. Graham Stein and our crew have seen this enough times in Long Beach’s sandy, shifting soil to know exactly what should be flagged and what is cosmetic.
If you’re reading this, you probably already own the Quikrete product or have a contractor who used it, and something about the concrete is not behaving the way it should. Maybe the slab is spalling, maybe the mix never fully cured, or maybe you are planning an ADU and want the foundation done right the first time so you are not back here in three years.
Which Quikrete Models This Applies To
Quikrete is not a single product line – it is a family of concrete mixes, and the specific mix used changes everything about how the slab performs. The most common products we see in Long Beach home additions and ADU projects are Quikrete 5000 High Early Strength mix (used for structural footings and load-bearing walls), Quikrete Crack-Resistant Concrete Mix (used for interior slabs and small pads), and Quikrete All-Purpose Gravel for sub-base drainage.
Here is the compatibility gotcha most homeowners do not learn until it is too late: Quikrete 5000 sets fast – often within 20 to 30 minutes in Long Beach’s warm, dry climate. That is a feature for a fence post, but it is a serious problem for a large ADU slab pour if the crew is not ready to work the surface immediately. We have torn out more than one DIY slab where the homeowner mixed Quikrete 5000 in the summer heat, turned around to answer a phone call, and came back to concrete that was already past working. For anything larger than a 4-foot by 4-foot pad in Long Beach, we use a slower-setting Quikrete mix or a properly managed pour with a vibrator and planned control joints.
On the OEM versus aftermarket question: Quikrete does not make “parts” in the traditional sense – there is no Quikrete-branded rebar, vapor barrier, or expansion joint. What matters is that the accessories match the mix. For Quikrete 5000, you want #4 rebar at 18-inch centers and a 6-mil polyethylene vapor barrier underneath for any habitable ADU space. We also stock brands like KraftMaid, Cambria, and Silestone for the finished surfaces that sit on top of that concrete, but the slab itself is always Quikrete when that is what the project spec calls for.
Styles & brands we work with
Signs Your Quikrete Home Additions & ADU Is Failing
- Hairline cracks that keep growing in length or width. A crack under 1/8 inch that has stayed stable for a year is usually shrinkage. A crack that widens each month, especially along the perimeter of a Long Beach ADU slab, points to soil movement or an undersized footing – and that needs a structural look, not just a patching compound.
- White, chalky powder on the surface (efflorescence). This means water is moving through the concrete and bringing minerals to the surface. In Long Beach, where the water table sits high in neighborhoods near the Los Angeles River and the coast, this often signals a missing or failed vapor barrier under the slab.
- Doors and windows in the addition start binding or rubbing. Concrete that shifts will telegraph movement up through the framing. If a door that swung freely last summer now sticks, the slab or footing underneath has moved.
- Spalling or flaking on the top layer of the slab. This is typically from a pour that was over-watered during mixing or finished too late. The surface skin separates from the body of the slab, and in Long Beach’s salt air near the coast, the exposed aggregate then degrades faster.
- Water pooling on the slab after rain instead of draining away. Quikrete slabs should be pitched a minimum of 1/4 inch per foot away from any structure. A flat or reverse-pitched pour means water heads toward the building, and in Long Beach’s winter storm season, that water will find its way inside.
See the difference
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AfterReplacement Cost & What’s Included
For Long Beach home additions and ADU work that involves Quikrete foundations or slabs, the installed range runs $45,000 – $130,000, depending on the size of the addition, the condition of the existing soil, and whether we are pouring a new footing or repairing an existing slab. A full ADU construction runs higher, typically $90,000 – $220,000, because it includes the foundation, framing, plumbing, electrical, and all finishes.
What drives the range in Long Beach specifically is soil preparation. Homes in Belmont Shore, Naples, and the Peninsula often sit on sandy, water-adjacent soil that requires deeper excavation and more compaction than the clay-heavy ground found farther inland near Bixby Knolls or Los Altos. The parts-plus-labor breakdown is always written into your quote before a single tool comes out of the truck. The price we write down on day one is the price on the invoice when the job is done. Every project carries our 365-Day Done Right Promise: if something is not right after the job is complete, we make it right.
DIY or Call Us?
What an owner can safely check on their own: measure the width of any crack with a simple ruler and note the date, watch whether water pools after a rain, and read the bag label if you still have leftover Quikrete mix to confirm which product was used. None of that requires a tool belt.
What goes wrong with DIY and concrete is not usually personal safety – it is structural failure that costs more to fix later. Mixing and pouring Quikrete for a structural slab requires the right water ratio, the right cure time, the right sub-base, and the right placement of control joints. Get any one of those wrong in Long Beach’s climate and you are looking at a slab that cracks within a year, at which point the fix costs more than the original pour. If the slab supports walls, a roof, or people sleeping above it, that is a job for a licensed contractor. Call (562) 512-7086 and we will come look at it and give you a written price before anything starts.
FAQs
A properly prepared and poured Quikrete slab in Long Beach lasts 30 to 50 years before it needs anything beyond cosmetic attention. The two things that shorten that lifespan here are soil movement near the coast and water intrusion from a missing or torn vapor barrier under habitable space. If you are seeing cracks in year two or three, something was wrong with the prep or the pour, not the product.
Yes, if the crack is stable and under 1/4 inch wide, it can often be routed and sealed with a polyurethane injection, which runs a fraction of the cost of a full slab replacement. But if the crack is still moving – visible widening between seasons – you are treating the symptom, not the cause. We will tell you straight which situation you have. Call (562) 512-7086 for an exact assessment, and the estimate is free.
A Quikrete foundation pour for a standard Long Beach ADU typically takes 3 to 5 days from excavation to a cured slab you can walk on, including formwork, rebar placement, the pour itself, and the initial 7-day cure window before framing can begin. Weather and city inspections add time. Long Beach’s building department generally schedules inspections within 2 to 3 business days, and we pull all permits and meet the inspector on your behalf.
Yes. Our trucks carry Quikrete 5000, Quikrete Crack-Resistant mix, Quikrete All-Purpose Gravel, rebar, wire mesh, and vapor barrier, so the materials are on site when the crew arrives. We plan material delivery around your pour schedule so bags are not sitting in the rain or the sun before they get mixed.
Written by Graham Stein, Owner, Elmstead Remodeling Long Beach at Elmstead Remodeling Long Beach, serving Long Beach and nearby areas.
