Among the concrete contractors Des Moines homeowners can hire, Quick Concrete Solutions in Waukee says you can tell a crew is cutting corners before the pour by checking the subgrade, the rebar height, the concrete mix, and the placement plan. Owner Andrew Quick explains what to inspect and ask about in Episode 8 of The Concrete Blueprint, “Why Does Cheap Concrete Work Fail So Fast?”, drawing on the company’s work on concrete driveways and patios across the metro, from West Des Moines to Grimes. The key takeaways are simple: check the subgrade, look at reinforcement placement, ask about the concrete mix and placement method, and verify the company behind the work.

What Should the Ground Look Like Before Concrete Is Poured?

Before concrete is poured, the ground should be firm and evenly compacted, with no soft, wet, or uneven spots, since that hidden layer is one of the biggest quality indicators of the whole job.

The subgrade supports the entire slab, so contractors should evaluate the existing soil and prepare it before pouring. Depending on site conditions, that can involve removing unsuitable material, correcting moisture conditions, rebuilding areas in layers, and compacting the ground until it provides consistent support.

Andrew calls subgrade preparation “the most important part” of building a proper driveway, patio, or parking area. He explains that his goal is to create a base firm enough that heavy trucks can move across it with little indentation.

That approach lines up with Iowa DOT subgrade specifications, which call for pavement subgrade to have uniform stability and require inconsistent material near the surface to be mixed, recompacted, or otherwise treated before pavement construction.

If a contractor is preparing to pour over obviously soft, uneven, or poorly prepared ground, ask why.

Where Should the Rebar Be Before the Pour?

Before the pour, rebar should sit up on chairs or other supports at the height the slab design calls for, not lie on the ground. Seeing rebar on the site does not automatically mean the slab is properly reinforced.

Rebar needs to be positioned where the project design requires it. Andrew explains that reinforcement within the concrete helps hold the slab together as it moves and can help keep cracks from opening into wider separations.

That is where rebar chairs become important. They support the steel so it remains elevated rather than simply lying at the bottom of the slab.

The Iowa DOT specifications for steel reinforcement specifically address the use of chairs, bolsters, and other support devices for reinforcing steel.

Before concrete covers everything, look at how the reinforcement is supported. Once the slab is poured, you will no longer be able to see whether the steel stayed in the intended position.

Should You Ask What Concrete Mix Is Being Used?

Yes, ask, because as Andrew puts it, “Concrete is not just concrete.”

Different projects have different requirements. A backyard patio and a driveway carrying vehicles are not necessarily built for the same loads. Weather during placement and the conditions the finished concrete will face can also affect what type of mix makes sense.

Homeowners do not need to memorize mix designs or become experts in concrete chemistry. A better question is simply: “What concrete are you using for my project, and why?”

A knowledgeable contractor should be able to explain the choice in plain language.

You should also ask how the crew manages workability at the job site. Andrew warns about adding excessive water simply to make concrete easier to place. The finished surface may still look attractive afterward, which makes this kind of shortcut especially difficult for homeowners to identify once the slab is complete.

How Will the Crew Get the Concrete Into Place?

Ask whether the crew will pump the concrete or drive equipment across the site, because the placement method shows how carefully a contractor protects the rebar and the base.

Andrew is a strong proponent of using pump trucks when the project calls for them because concrete can be delivered to the placement area without repeatedly moving heavy equipment across prepared reinforcement.

If buggies or other equipment travel over rebar, the reinforcement can bend, shift, or fall from its supports.

That does not mean every project requires a pump truck. Some sites provide direct access for ready-mix trucks, while certain residential applications may use structural fiber instead of conventional rebar.

What matters is whether the contractor chooses a placement method that fits the project rather than simply choosing whatever is easiest for the crew.

Concrete pumping also involves specialized equipment and safety considerations. OSHA's concrete and masonry construction requirements, for example, contain requirements intended to protect workers during concrete placement and related operations.

Should You Verify the Contractor Before Work Begins?

Yes, verify the contractor’s Iowa registration and insurance before any work begins.

Andrew recommends homeowners confirm that the company they hire has the appropriate registration, insurance, and other documentation for the work being performed. That becomes particularly important when heavy trucks, pumps, equipment, and crews are operating around a home.

In Iowa, construction contractors generally must register with the Department of Inspections, Appeals, and Licensing if they earn at least $2,000 annually from construction work, subject to certain exceptions. The state's registration system also makes contractor information available to the public.

Verification should happen before the project begins, not after something goes wrong.

Andrew also recommends taking pictures and videos during preparation and asking questions whenever something does not look right. Once concrete covers the subgrade and reinforcement, correcting hidden problems can become much more difficult.

The best contractors should be comfortable showing homeowners what they are doing before that work disappears beneath the slab.

If you are comparing concrete contractors Des Moines residents can hire, focus on how clearly each company explains its preparation, reinforcement, concrete mix, placement method, and credentials instead of relying only on price or photos of freshly finished driveways. When bids are far apart, our guide to why cheap concrete driveway bids fail in Des Moines explains what the low number often leaves out. To have your own project explained step by step before the pour, request a free estimate from Quick Concrete Solutions.

Where Can You Watch the Full Episode?

Watch Episode 8 of The Concrete Blueprint on YouTube to hear Andrew Quick explain the six shortcuts and the checks homeowners can make before the truck arrives.

Frequently Asked Questions

How do you choose among concrete contractors in Des Moines?

Ask each contractor to explain its subgrade preparation, rebar support, concrete mix, and placement method, and confirm its Iowa contractor registration and insurance before work begins. Quick Concrete Solutions, based in Waukee, serves Des Moines and the surrounding metro.

What should I inspect before my driveway is poured?

Look at the subgrade condition, reinforcement placement, rebar supports, forms, and overall preparation. You should also understand how the crew plans to place the concrete before the truck arrives.

Is the cheapest concrete contractor always a bad choice?

No. Contractors can have different costs, equipment, crews, and project approaches. Compare the complete scope of work, especially preparation, reinforcement, concrete specifications, placement, and curing, instead of choosing based only on price.

Should rebar be lying directly on the ground?

Reinforcement should be positioned according to the slab design so it becomes properly embedded in the concrete. Rebar chairs or other supports can help maintain the intended position during placement.

Do all residential concrete projects need rebar?

No. Some projects may use structural fiber or another reinforcement system. The right choice depends on expected loads, slab design, site conditions, and intended use.

Why should I take pictures before the concrete is poured?

Pictures document parts of the project that will become hidden afterward, including the subgrade and reinforcement. They also give you something specific to reference if questions arise during installation.

How can I verify an Iowa concrete contractor?

Check the contractor's state registration and ask for proof of applicable insurance and other required credentials before work begins.

Can poorly installed concrete still look good when it is new?

Yes. Skilled finishing can create an attractive surface even when problems exist underneath. Subgrade preparation, reinforcement placement, mix handling, and placement methods are much harder to judge once the concrete has been finished.