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This page is a realtor-facing reference. If you are a buyer reading this, start with How to Read Your Inspection Report

Phase 1 Foundation Pre-Pour Inspection — The "Dirty" Inspection

This page is for realtors and buyers' agents working with clients in new construction. Buyers can also use it as background reading before scheduling. We've structured this guide around the seven focus areas of an actual Property Pulse pre-pour inspection, followed by realtor scripts, how to handle builder pushback, and what comes next in the new-construction sequence.

Why This Inspection Matters

Once concrete is poured, defects in the slab are effectively permanent. Rebar resting on the vapor barrier instead of on chairs will rust and eventually crack the slab from the inside out. Plumbing penetrations through deep grade beams without proper protection will shear off when the foundation settles. A torn vapor barrier becomes a permanent moisture conduit that warps hardwood floors years after closing. A post-tension cable in contact with a plumbing pipe can crack that pipe when the cable is tensioned to 33,000 pounds — inside the slab, where it's unreachable.

A Phase 1 inspection is an independent quality-control audit performed before the pour, when defects can still be corrected. The builder's own QC walk is typically a few minutes by a busy superintendent. Your buyer's inspector spends 2–3 hours verifying every chair, every penetration, every seam, and every embedment before the truck arrives.

What We Inspect

A Property Pulse pre-pour inspection covers seven focus areas. Each one is documented in your buyer's report with photos, observations, and specific recommendations to the builder where deficiencies are found.

Design Criteria & Plans Review

The engineered foundation plans are the reference standard for everything that follows. Without them, there's no objective benchmark to inspect against.

What we verify:

Foundation plans are available on-site
Foundation was designed by a licensed Texas structural engineer
Engineer's name and registration number are documented
Plans are reviewed against site conditions before the inspection begins

Common findings:

Plans not available on-site (a red flag worth pausing for)
Plans are an outdated revision that doesn't match what's been built
Field deviations from the plans without engineer approval letters

Site Preparation & Bearing Soil

Before any steel or vapor barrier goes down, the dirt itself has to be ready to support the slab for the life of the home.

What we verify:

Bearing soil type (virgin soil vs. engineered fill)
Soil is properly compacted and doesn't shift under foot weight
Beam excavations are clean and free of debris
Root shields installed where trees or shrubs sit within 20 feet of the foundation

Common findings:

Tree roots growing through beam excavations
Loose or improperly compacted bag fill that moves under foot weight
Missing root shields where required by the engineered plans
Beam excavations contaminated with debris from earlier trades

Formwork & Framing

The wood form boards that hold the wet concrete in place must be straight, plumb, properly braced, and free of gaps before the pour can begin.

What we verify:

Form boards are straight and vertically plumb
String lines are in place
Slab thickness matches the engineered plans (typically 4–6 inches)
Thickened slab sections meet specified depths (e.g., 12 inches under fireplaces)
Form bracing can resist the lateral pressure of wet concrete

Common findings:

Gaps in the bottom of form boards that will cause spillage or blowouts
Form bracing improperly anchored or missing at corners
Damaged formwork in need of repair before the pour
Forms not square to the engineered footprint

Moisture Barrier

The polyethylene vapor barrier under the slab is the home's first line of defense against subsurface moisture, gases, and radon.

What we verify:

Barrier is at least 10 mil thickness
Seams properly lapped by 6 inches or greater
Polyethylene barrier tape applied at all laps
Plumbing penetrations sealed with mastic and waterproof tape
Barrier extends up the inside of beam walls per the engineered specification

Common findings:

Holes and tears from foot traffic and rebar placement
Plumbing penetrations not sealed at all
Seams held together with duplex nails instead of vapor barrier tape
Improper materials (duct tape) used to "repair" damage
Barrier cut short so it doesn't extend up the beam wall as specified
Excess rebar and debris left on top of the barrier

Beams

The grade beams — the deeper trenches of concrete around the perimeter and under interior load-bearing walls — are the structural heart of a slab-on-grade foundation.

What we verify:

Beam width and depth match the engineered plans
Beam spacing matches the engineered plans
Beams extend into undisturbed soil or compacted fill
Interior beams continue at full depth into the perimeter beams they intersect
No water, debris, or cave-ins in excavations

Common findings:

Beam widths below the engineered specification (e.g., 10-inch where plans called for 12-inch)
Interior beams shallower than the perimeter beams they intersect
Construction debris in the bottom of beam excavations
Missing engineer approval letters for any field deviation

Steel Reinforcement & Embedments

Most Central Texas slabs use a hybrid system of post-tension cables and rebar. Both have specific installation requirements that get violated frequently — this is the largest section of the inspection and produces the most findings.

What we verify for post-tension cables:

Cables spaced per the engineered plans
Cables at least 1/2 inch in diameter
Tendon anchors installed at all live ends and attached to form boards
Cat heads installed at live ends and hand-tightened
Pocket formers installed at live ends and in contact with form boards
Sheathing is intact and any cuts or splices are properly taped
Cables supported by chairs no more than 4 feet 6 inches apart
Cables draped at the correct height and not in contact with the vapor barrier, fill, plumbing, or form boards
Wire ties at every cable-and-rebar intersection

What we verify for rebar:

Corner bars installed at all foundation corners
Corner bars properly overlapped (at least 30 bar diameters)
Corner bars tied to post-tension cables with wire ties
Reinforcing steel held off form boards by at least 1.5 inches

What we verify for hurricane hold-downs:

Embedded connectors (Simpson STHDs and similar) positioned at engineer-specified locations
Hold-downs set to the correct depth before the pour (they cannot be added afterward)

Common findings:

Cables sitting on the vapor barrier instead of on chairs
Collapsed or improperly spaced support chairs
Missing cat heads at cable live ends (allowing movement during the pour)
Wire ties missing at cable-and-rebar intersections
Cables in direct contact with plumbing risers, fill material, or form boards
Sheathing splices left untaped
Corner bars laying loose in the bottom of beam excavations
Reinforcing steel in contact with form boards

In-Slab Utilities

Plumbing supply, plumbing waste and electrical conduit all pass through the slab and must be installed correctly before the pour.

What we verify for plumbing:

Supply and waste lines properly spaced from foundation forms
Plumbing buckets elevated above fill material
Plumbing risers anchored to prevent movement during the pour
Adequate clearance between plumbing and post-tension cables

What we verify for electrical:

Flexible blue conduit terminates above the slab level
Flexible conduit protected by rigid conduit where it crosses beams
Electrical terminations placed at locations specified by engineering documents

Common findings:

Plumbing buckets installed in contact with fill material
Plumbing buckets sitting directly on top of post-tension cables
Insufficient clearance between plumbing and cables
Plumbing risers not anchored against movement
Flexible electrical conduit terminating below the slab level
Flexible conduit unprotected where it crosses foundation beams

What We Actually Find

The carousel below shows six representative examples from actual Property Pulse pre-pour inspections in Central Texas — what gets caught before the truck arrives.

Each of these is a fixable problem at the pre-pour stage. The same finding after the concrete truck leaves is either expensive to remediate or impossible to remediate.

Post Tension Cable on Vapor Barrier

Post-tension cables are supposed to ride above the vapor barrier on plastic chairs spaced no more than 4 feet 6 inches apart. Found multiple cables sitting directly on the barrier — the cables are at the wrong depth in the slab, and the barrier itself is compressed where they rest.

Collapsed Support Chairs

The plastic chairs that hold post-tension cables in position had collapsed under the weight of the cables. The cables sit at the wrong depth, and a cable at the wrong depth changes how the entire slab handles compression.

Corner reinforcing bars laying loose in a beam

Steel corner bars are required to be tied to the post-tension cables at foundation corners, providing additional reinforcement at the highest-stress points in the slab. These were found loose at the bottom of the beam excavation, where they provide essentially no structural value.

Post Tension Cable on Vapor Barrier

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Realtor Advice & Strategy

For Buyer Agents

The "Buried Evidence" Script: Once the concrete truck leaves, we lose the ability to verify the most expensive components of this home. This inspection ensures the bones aren't resting on a torn vapor barrier or in contact with the plumbing. It's the ultimate insurance policy for your buyer's investment — and the only one they can never buy after the fact.
The "Third-Party QC" Script: The builder's engineer comes out for a spot check, often for just a few minutes. Our independent inspector performs a full quality-control audit, spending 2–3 hours verifying every cable chair, every penetration, every seam, and every embedment. That's the difference between a checklist and an audit — and it's documented in a 15–20 page report your buyer keeps.
The "Catch It Before It's Permanent" Script: Most pre-pour findings are 30-minute fixes for the builder if caught before the pour — taping a seam, replacing a chair, repositioning a cable. The same defects after closing cost tens of thousands to remediate, if they can be remediated at all. The math on this inspection is obvious.

For Builders

Build a pre-pour window into the schedule: A 2–3 hour inspection window scheduled the day before the pour costs nothing and creates no delay. Builders who accommodate phase inspections proactively close more buyer-direct contracts.
Document your own QC: If your superintendent walks the slab before the inspector arrives and addresses anything obvious, the third-party report becomes a confirmation rather than a discovery. Faster turnaround, fewer surprises.

Handling Builder Pushback

Some builders resist phase inspections, especially at the pre-pour stage. Common objections and how to respond:

"Our engineer signs off on the slab." That sign-off is typically a brief visual confirmation, not a detailed audit. Your buyer is entitled to an independent inspection, and most structural engineers welcome the second set of eyes.
"We pour on tight schedules — we can't wait." A pre-pour inspection is scheduled for the day before the pour and takes 2–3 hours. There is no delay to the calendar. Builders who claim otherwise are typically trying to avoid the inspection itself.
"This isn't standard for our builds." Phase inspections have been standard practice in custom construction for decades and are increasingly standard for production builds too. "Not standard for us" is not the same as "not allowed."
"You'll find things and ask us to delay." Most pre-pour findings are 30-minute fixes — adding a chair, taping a seam, repositioning a cable, anchoring a plumbing riser. Builders who treat findings as collaborative rather than adversarial close faster, not slower.

Recommended Ancillary Services

Sewer Scope (Pre-Backfill): Verifying lateral lines are clear before backfill is inexpensive insurance against construction debris — rocks, lumber fragments, fast-food wrappers — being permanently trapped in the line.
Engineer's Letter Review: Where the structural engineer issues written approval for any field deviations from the original plans, request a copy for your records.

What Comes Next

The pre-pour inspection is the first of three phase inspections in a standard new-construction sequence. Once framing is complete and before drywall is installed, schedule the Phase 2 Pre-Drywall Inspection to verify the structural load path, mechanical rough-in, and exterior envelope before everything gets covered for the life of the home.

If You're a Buyer Reading This...

You're early — that's exactly when this matters most. Phase 1 inspections have to be scheduled before your builder's pour date, often with only a few days of lead time. Don't wait until your builder offers it (most won't). Schedule directly with us, and we'll coordinate the timing with your builder's superintendent.

How to Read Your Report