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Fluid-applied air barrier

Fluid-applied air barrier pre-cover inspection checklist

A fluid-applied air barrier pre-cover inspection is the hold point before concealed work disappears behind the next layer. This checklist is built for that walk: verify, photograph, then release the cover, not the other way around. Work is commonly verified against the applicable building/energy code, manufacturer's published instructions. Confirm the edition your authority having jurisdiction has adopted.

The checklist

Every item, and the photo evidence it needs

The photo count on each row is what RTI would require before the item can be submitted. Work the list here and watch the gate hold, or load it into RTI and let it enforce the real thing.

01

Continuity and coverage

  • Membrane continuous with full coverage

    Field coat continuous with no holidays, pinholes or thin spots at reveals and corners, coverage confirmed against the specified thickness or wet-mil target with no bare sheathing showing.

  • Wet-mil readings logged for each elevation

    Wet-mil gauge readings taken during application at the frequency the spec or manufacturer sets, logged by elevation and floor, with a representative reading photographed.

  • Pails used reconciled with the area coated

    Pails used on each elevation compared with the area coated at the manufacturer's coverage rate; a shortfall is flagged for thickness checks before cover.

    No photo
  • Membrane carried behind items set before application

    Barrier continuous behind ledgers, clip angles, pipes and in tight inside corners where the spray or roller was blocked, checked with a light where the view is poor.

  • Adhesion test results on file where specified

    Pull or peel adhesion results for each substrate recorded by the method the spec or manufacturer sets, with low readings traced to prep and the area redone.

    No photo
02

Transitions and tie-ins

  • Transitions tied in and lapped correctly

    Barrier tied continuously to window flanges, roof-to-wall and deck flashing, and the below-grade or foundation barrier, laps shingled to shed water and fully bonded.

  • Penetrations sealed and integrated

    Every pipe, conduit and support penetration sealed and integrated into the field membrane, no gaps or bridged sealant at the collar.

  • Field coat lapped over slab-edge reinforcing sheets the detailed width

    Field membrane carried over the reinforcing sheet at each slab edge by the overlap the detail shows, edges bonded with no open laps.

  • Sealant and flashing labels checked against the compatible list

    Sealant, flashing tape and through-wall flashing products other trades are using at the barrier read by label against the manufacturer's compatibility list, nothing softening the membrane.

03

Cure and repair before cover

  • Barrier cured and defects repaired before cladding

    Membrane cured per the instructions, damaged or thin areas repaired and re-inspected, signoff recorded before any cladding or furring covers the wall.

  • Days of UV exposure checked against the product's cover window

    Date each elevation was coated compared with the manufacturer's maximum exposure before cover; overexposed areas flagged for the manufacturer's recoat or cleaning direction.

    No photo
  • Exposed membrane checked for chalking, cracking or color change

    Surface looked at on the sunniest elevation for chalking, crazing, fading or dirt buildup that would block bond to tapes or sealants applied later.

04

Testing and release

  • Air leakage test results received from the testing agency

    Testing agency's report for the mockup or wall area on file where specified, each leakage location it found sealed and re-tested before that area is covered.

    No photo
  • Released areas marked for the furring and cladding crews

    Released elevations or gridlines marked on the drawings and passed to the next trade, with unreleased areas flagged on the wall so furring doesn't start there.

    No photo

What usually sends this back

The failures are almost always the evidence, not the work

  • Cladding furring started on one elevation before the barrier was signed off, so the tie-ins behind it can never be confirmed and the whole elevation is taken on faith.
  • Thin or holidayed spots at reveals and shadow lines left uncoated, invisible until wetting testing or a leak, by which time the cladding is on.
  • Transitions to windows, roof-to-wall flashing and the below-grade barrier left disconnected, so the membrane is continuous everywhere except the joints that matter.

Common questions

6 answers

What does this fluid-applied air barrier pre-cover checklist cover?
14 items across 4 sections, covering continuity and coverage, transitions and tie-ins, cure and repair before cover, testing and release. 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 applicator's foreman with the GC's superintendent, and often the manufacturer's field rep, walking the whole wall before any cladding goes up.
When in the schedule should this walk happen?
After the barrier has cured and before furring, insulation or cladding covers it, the last moment the full membrane is visible and repairable.
Why do these items ask for a photo?
9 of the 14 items call for photo evidence, 12 photos in all. 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 fluid-applied air barrier pre-cover inspection?
Cladding furring started on one elevation before the barrier was signed off, so the tie-ins behind it can never be confirmed and the whole elevation is taken on faith. Thin or holidayed spots at reveals and shadow lines left uncoated, invisible until wetting testing or a leak, by which time the cladding is on. Transitions to windows, roof-to-wall flashing and the below-grade barrier left disconnected, so the membrane is continuous everywhere except the joints that matter.
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.