How to Verify Your Contractor Before the Pour

The best time to verify a concrete job is before the concrete is poured.

After the pour, most of the important details are buried forever: slab thickness, footing size, reinforcement placement, vapor barrier condition, base prep, penetrations, and layout accuracy.

That does not mean a customer needs to become an engineer or inspect every detail alone. It does mean you should know the basics of what to look for before the trucks arrive. This page is for that.

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First: understand what you are trying to verify

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Step 1: have the written scope in hand

Before you walk the site, have:

• the quote
• the plan or sketch if one exists
• the slab dimensions
• the footing dimensions
• the reinforcement description
• the vapor barrier description

Do not rely on memory. Compare the site to the written promise.

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Step 2: check the slab layout

Walk the forms. Look at length, width, shape, door openings, wall lines, offsets, and interior thickened areas if applicable.

A five-minute check here can save a major correction later.

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Step 3: confirm slab thickness and footing dimensions

You may not be able to verify every inch of the job perfectly, but you can usually confirm whether the setup generally matches the scope.

Look for:

• form height consistent with slab thickness
• visible footing trenches
• thickened edges where promised
• interior footings or pads where required

Take photos before placement.

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Step 4: look at the base

The base is easy to ignore because it is not glamorous, but it matters a lot. You want the support under the slab to look intentional and ready, not muddy and rushed.

You do not need to know every technical detail to know the difference between "prepared" and "not prepared."

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Step 5: check reinforcement

If reinforcement is included in the scope, verify that it is actually there and generally matches the description. Look for mesh, rebar, or other specified material; approximate spacing matching the stated scope; overlap and continuity where appropriate; support or chairs where needed; reinforcement in footings if specified.

Reinforcement should not just be an idea on paper.

If the crew says it will be "pulled up during the pour," ask calm follow-up questions:

• How do you keep it where it belongs?
• What support method are you using?
• Is this how you normally install this reinforcement?

Take photos before the pour.

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Step 6: check the vapor barrier

If a vapor barrier or vapor retarder is included, verify that it looks like a real part of the assembly.

• full coverage under the slab area
• seams handled consistently
• obvious tears repaired
• penetrations addressed
• edges not ignored

A vapor barrier that is badly torn, loose, or partially missing is not the same as a properly installed one.

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Step 7: confirm plumbing, sleeves, anchors, and embeds

Concrete is unforgiving once placed. Before the pour, check plumbing stub-outs, sleeves, drains, anchor bolt layout if applicable, column or frame locations, and any embedded items.

This is one of the easiest places to prevent painful rework.

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Step 8: ask about joints and finish

A planned answer is a good sign. A vague answer is worth noting.

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Step 9: ask about curing and protection

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Step 10: document everything

Before the pour:

• take overview photos
• take close-ups of reinforcement
• take photos of footing trenches
• take photos of vapor barrier seams and penetrations
• take photos of embeds and stub-outs
• save a copy of the written scope

This protects you and also protects good contractors from confusion later.

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What not to do

• wait until concrete is flowing to ask major layout questions
• assume all bids include the same thing
• assume hidden work was done just because the final slab looks smooth
• be embarrassed to ask clear questions

A good contractor should not be threatened by reasonable pre-pour verification.

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Red flags before a pour

Take a closer look if you see:

• major layout changes not previously discussed
• obvious soft base conditions
• reinforcement missing or very different from the scope
• badly torn or incomplete vapor barrier
• missing stub-outs or embeds
• "we'll figure it out when the truck gets here"
• crew uncertainty about thickness, layout, or what was sold

One red flag does not always mean disaster, but it does mean you should slow down and get clarity.

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The short version

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