Free checklist
Under-slab vapor retarderUnder-slab vapor retarder final inspection checklist
Under-slab vapor retarder final inspection is where the punch list is either short or expensive. This checklist walks the finished work the way an owner or AHJ will see it: devices on, systems running, everything labeled. Each item gets the photo that closes it instead of reopening it. Work is commonly verified against ASTM vapor retarder standards, ACI concrete guidance, manufacturer's published instructions. Confirm the edition your authority having jurisdiction has adopted.
- Items
- 3
- Photos required
- 4
- Built for
- Subcontractors
Who runs it
The concrete foreman with the GC's superintendent, confirming the edge condition after strip and before the floor finish goes on.
When in the schedule
After the slab is placed and forms are stripped, before floor finishes cover the slab edge and turn-up.
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.
Slab edge and turn-up
- 2 photos
Retarder turn-up intact at the slab edge
Sheet still turned up and tied in at the perimeter after strip, not trimmed flush or pulled away, edge documented before finishes cover it.
Penetrations after the pour
- 1 photo
Penetration seals undisturbed
Stub-ups and penetrations still sealed at the slab after other trades worked the floor, no gaps opened around them.
Record before cover
- 1 photo
Retarder condition documented before finishes
Pre-pour and edge photos filed for the pad so the barrier condition is on record before the floor finish is installed over it.
What usually sends this back
The failures are almost always the evidence, not the work
- The sheet turn-up trimmed flush or torn away at the edge during strip, breaking the tie-in that was sound before the pour.
- Penetration seals disturbed by post-pour trades, leaving a gap around a stub-up that the finish floor will sit over.
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 4 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 under-slab vapor retarder final checklist cover?
- 3 items across 3 sections, covering slab edge and turn-up, penetrations after the pour, record before cover. 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 concrete foreman with the GC's superintendent, confirming the edge condition after strip and before the floor finish goes on.
- When in the schedule should this walk happen?
- After the slab is placed and forms are stripped, before floor finishes cover the slab edge and turn-up.
- Why does every item ask for a photo?
- 4 of the 3 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 under-slab vapor retarder final inspection?
- The sheet turn-up trimmed flush or torn away at the edge during strip, breaking the tie-in that was sound before the pour. Penetration seals disturbed by post-pour trades, leaving a gap around a stub-up that the finish floor will sit over.
- 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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