Free checklist
Soil stabilizationSoil stabilization rough-in inspection checklist
Soil stabilization rough-in is the last time the work is fully visible. Once the cover inspection passes and the walls, ceilings and slabs close, every defect left behind becomes a demolition bill. This checklist walks the rough-in in the order the work goes in, with the photo each item needs before it gets buried. Work is commonly verified against the project geotechnical report and specifications. Confirm the edition your authority having jurisdiction has adopted.
- Items
- 6
- Photos required
- 10
- Built for
- General contractors
Who runs it
The GC's superintendent or earthwork QC tech walking the section with the stabilization crew before compaction begins.
When in the schedule
After the subgrade is shaped and proof-rolled, once additive is spread and mixed but before the first compaction pass locks it in.
The checklist
Every item, and the photo that proves it
The photo count on each row is what RTI would require before the item can be submitted. Copy the list as is, or load it into RTI and let the gate enforce it.
Subgrade and proof-roll
- 2 photos
Subgrade shaped and proof-rolled before additive
Section proof-rolled and any soft or pumping spots dug out and replaced, grade and cross-slope close to design before spreading starts.
- 1 photo
Section limited to what can be mixed and compacted in the window
Spread area sized to the crew's compaction capacity so no mixed soil sits and dries before it's rolled.
Additive and application rate
- 2 photos
Additive type matches the mix design
Lime, cement or fly-ash matches what the geotechnical mix design calls for, delivery tickets photographed against the spec.
- 2 photos
Spread rate verified against the design
Application rate confirmed by bag count or spreader ticket over the measured area, compared to the pounds per square yard the design requires.
Mixing and moisture
- 2 photos
Mixing depth checked in the section
Mixer cut probed or dug to confirm the additive is blended to the full design depth, not just the top few inches.
- 1 photo
Moisture conditioned into the compaction window
Soil watered or aerated to the moisture range the design calls for before compaction, uniform color with no dry pockets or ponded water.
What usually sends this back
The failures are almost always the evidence, not the work
- Additive spread by the truckload with no bag or ticket count against the design rate, so a light section goes in undetected.
- Mixer set for a shallow pass that leaves an unstabilized layer under the design depth, only found when the section pumps later.
- Soil mixed dry of the moisture window because the crew was chasing daylight, so it never reaches density.
Run it with the Photo Gate
A checklist nobody can submit half-finished
Load this list into RTI, stick a QR tag on the area it covers, and the submit button stays locked until every mandatory item is answered and the 10 required photos exist. Approved walks roll into a branded turnover package with a tamper-evident record behind every line.
Submission state
The gate is enforced on the server, so it holds even if the phone is offline when the walk happens.
Common questions
- What does this soil stabilization rough-in checklist cover?
- 6 items across 3 sections, covering subgrade and proof-roll, additive and application rate, mixing and moisture. Each item spells out what the person walking the job is actually looking for, not just a box to tick.
- Who should run this inspection?
- The GC's superintendent or earthwork QC tech walking the section with the stabilization crew before compaction begins.
- When in the schedule should this walk happen?
- After the subgrade is shaped and proof-rolled, once additive is spread and mixed but before the first compaction pass locks it in.
- Why does every item ask for a photo?
- 10 of the 6 items call for photo evidence. A checklist answer without the photo is a claim; the photo is what makes the record worth something in a dispute and lets a reviewer approve work without re-walking the job.
- What most often fails a soil stabilization rough-in inspection?
- Additive spread by the truckload with no bag or ticket count against the design rate, so a light section goes in undetected. Mixer set for a shallow pass that leaves an unstabilized layer under the design depth, only found when the section pumps later. Soil mixed dry of the moisture window because the crew was chasing daylight, so it never reaches density.
- Can I use this checklist in RTI?
- Yes. Start a free RTI workspace, build this list as a checklist, and the Photo Gate holds the submit button until every mandatory item is answered and its photos are attached. Approved inspections roll into a branded turnover package with a tamper-evident audit trail.
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