GRC/GFRC Panel Installation & Joint Alignment Inspection

The checklist

Documentation & Approvals

1. 1Confirm latest IFC drawings, approved shop drawings, method statements, and ITP are on-site and in the app; acceptance: current revisions only; evidence: capture revision numbers and responsible signatories.
2. 2Cross-check panel type, finish, and location tags against approved schedules before install; method: compare delivery labels to layout; acceptance: 100% match; evidence: photos of tags and delivery tickets.
3. 3Verify installer qualifications and lifting/rigging certificates are valid; method: review competency cards and sling tags; acceptance: in-date certifications; evidence: copies or photos attached to lot.

Substructure & Tolerances

1. 4Survey primary support frame datums with total station/laser; acceptance: deviation ≤ ±5 mm over 10 m and ≤ ±3 mm at bracket points; evidence: upload survey report and marked photos.
2. 5Verify bracket locations and stand-off dimensions vs setting-out; method: steel tape/laser measure; acceptance: within ±3 mm of design; evidence: annotated photos with measurements.
3. 6Check anchors/brackets for corrosion protection and damage; method: visual inspection with good lighting; acceptance: intact coating, no burrs or deformation; evidence: close-up photos before fixing.
4. 7Confirm isolators/shims are non-corrosive, compressive-grade, and thickness recorded; method: caliper measurement; acceptance: sizes per design stack-up; evidence: shim log and photos in place.

Panel Installation

1. 8Check lifting points, inserts, and slings before hoist; method: inspect hardware and sling SWL vs panel mass; acceptance: SWL ≥ required with safety factor; evidence: sling tag photo and lift plan reference.
2. 9Confirm panel ID matches grid location prior to fixing; method: tag cross-check to layout; acceptance: correct panel at position; evidence: photo of tag against elevation mark.
3. 10Verify panel plumb using spirit level/laser; acceptance: out-of-plumb ≤ 3 mm per 3 m height; evidence: photo showing bubble/laser reading and reference height.
4. 11Check panel level and face plane with 2 m straightedge; acceptance: offset between adjacent panels ≤ 3 mm; evidence: straightedge photo with feeler gauge reading.
5. 12Tighten mechanical fixings with a calibrated torque wrench; acceptance: 90–110% of specified torque; evidence: torque log with wrench serial, setting, and signature.
6. 13Confirm restraint anchors are fully engaged without fouling reinforcement; method: visual/witness marks; acceptance: ≥ 2 full threads visible beyond nut; evidence: close-up photos.
7. 14Check bedding pads under bearing points are seated and evenly compressed; method: feeler gauge and visual; acceptance: ≥ 80% contact area; evidence: pre- and post-load photos.

Joints & Sealant

1. 15Measure joint width at three points per joint with feeler gauge; acceptance: within ±2 mm of design width (e.g., 10–15 mm); evidence: recorded readings and photos.
2. 16Check joint alignment continuity with string line/laser along elevation; acceptance: deviation ≤ 3 mm over 10 m run; evidence: alignment photos and laser readouts.
3. 17Verify backer rod diameter is 25–50% larger than joint; method: caliper and sample check; acceptance: continuous, not stretched or twisted; evidence: packaging lot and in-situ photo.
4. 18Inspect sealant bead: depth/width ≈ 1:2, proper tooling and adhesion; method: depth gauge and visual; acceptance: smooth profile, no voids; evidence: close-up photos and batch number.
5. 19Confirm drainage paths/weep holes behind panels are unobstructed; method: probe test and water pour if safe; acceptance: free flow to designed outlets; evidence: video/photo and notes.

QA Evidence & Sign-off

1. 20Capture façade elevation photos per bay after alignment; acceptance: no edge chips > 5 mm on exposed faces; evidence: labeled grid photos and punch-list status.
2. 21Record ambient and substrate conditions during sealing; method: thermometer/hygrometer; acceptance: 5–35 °C, RH ≤ 80%, dry substrate; evidence: meter readings with timestamps.
3. 22Verify temporary protection (edge guards, films) installed post-seal; acceptance: full coverage until handover; evidence: photos and protection plan reference.
4. 23Obtain inspection approvals: installer QC, main contractor, consultant; acceptance: all comments closed; evidence: signed IR/ITP, NCRs resolved with photos.
5. 24Complete as-built survey of panel coordinates; method: total station export; acceptance: nodes within ±5 mm of grid; evidence: attached CAD/CSV and sign-off.

Preview the printable checklist

Preview page one below. Open the image or download the PDF for all pages.

At a glance

• Assure façade uniformity by surveying datums, confirming bracket positions, and checking panel plumb, level, and plane to tight, practical tolerances. Proper setting-out avoids stepped joints, gapping, and shadow misalignment across long elevations.
• Reduce rework by verifying mechanical fixings with calibrated torque wrenches, logging shim sizes, and confirming restraint anchor engagement. Captured evidence—photos, torque logs, and survey CSVs—supports rapid approvals and traceable close-out.
• Improve weatherproofing by sizing backer rods correctly, controlling sealant depth and profile, and keeping drainage paths unobstructed. Document environmental conditions to ensure reliable curing and long-term joint performance.
• Interactive online checklist with tick, comment, and export features secured by QR code.

How to Use This GRC/GFRC Installation Inspection Checklist

1. Preparation: assemble laser level/total station, 2 m straightedge, torque wrench, calipers/feeler gauges, thermometer/hygrometer, PPE, access equipment, lighting, and approved drawings, method statements, and ITPs loaded in the app.
2. Open the project and confirm the latest revisions are synced. Create inspection lots by elevation/bay so evidence, measurements, and photos align with grid references.
3. Start interactive mode, scan the QR to authenticate, and select the relevant lot. Tick items as you proceed, guided by the group structure.
4. Add comments, assign actions with deadlines, and attach photos, torque logs, and survey files directly to each item for traceability.
5. On completion of a bay, run a quick review filter for unticked or commented items. Resolve punch-list entries and recheck affected tolerances.
6. Export the report as PDF/Excel with embedded photos, measurement tables, and signatures. Share with stakeholders and archive within your QA records.
7. Sign-Off: capture digital signatures from installer QC, main contractor, and consultant; lock the checklist. The QR authenticates the final, approved record.

Setting-Out Precision and Practical Tolerances

Accurate setting-out underpins a clean, continuous façade line. Begin by validating the primary support frame with a total station, tying into control datums and benchmarking bracket coordinates. Minor bracket adjustments (±3 mm) often resolve long-run misalignment that would otherwise create stepped joints and uneven shadow gaps. Use a calibrated laser to confirm vertical and horizontal control lines before each bay. During installation, check panel plumb, level, and plane using a 2 m straightedge and spirit level; keep cumulative error in check by referencing back to fixed datums every third panel. Log all measurements in SI units and capture marked photos. When tolerances clash with site conditions, escalate early and adjust shimming strategically rather than forcing fixings. Always prioritize the approved project specifications and authority requirements if they demand tighter control.

• Survey datums first; adjust brackets to within ±3 mm.
• Re-check alignment every third panel to limit drift.
• Use 2 m straightedge for plane; document readings.
• Capture marked photos aligned to grid references.
• Follow stricter project tolerances where specified.

Fixings, Supports, and Load Transfer Confidence

Panels rely on correctly specified fixings and consistent load transfer to avoid cracking and rattling. Use a calibrated torque wrench to achieve 90–110% of the specified torque, recording wrench serials and results. Confirm full thread engagement at restraints and avoid interference with internal reinforcement. Bedding pads must bear evenly with at least 80% contact to spread loads and prevent point stress. Where stand-offs are required, use non-corrosive shims recorded by thickness to maintain geometry and thermal breaks. Avoid over-tightening, which can induce stress into the GFRC skin. A practical workflow is dry-fit, measure, adjust shims, re-fit, then final torque with a witness mark. Photographs of each connection and a concise torque log allow rapid third-party verification and close-out.

• Calibrated torque wrench; log 90–110% of target.
• Ensure ≥ 2 threads visible beyond nut.
• Record shim materials and thicknesses.
• Bedding pads ≥ 80% contact under load.
• Witness-mark nuts after final torque.

Joint Control, Sealant Performance, and Drainage

Consistent joint width and depth ensure visual continuity and weatherproofing. Measure joint widths at three points per joint and maintain within ±2 mm of design. Select a backer rod 25–50% larger than the joint to achieve the 1:2 sealant depth-to-width ratio; avoid stretching that thins the profile. Apply sealant to clean, dry substrates within environmental limits (5–35 °C, RH ≤ 80%), tooling to a smooth, concave profile. Keep drainage paths and weeps open behind the cladding; consider a controlled water test if safe and approved. Document sealant batch numbers, lot certificates, and curing times, then protect edges from accidental damage. These controls reduce water ingress, staining, and premature joint failure.

• Joint width within ±2 mm of design.
• Backer rod 25–50% larger than joint.
• Sealant depth:width ≈ 1:2, smooth profile.
• Apply within 5–35 °C, RH ≤ 80%.
• Keep drainage paths and weeps unobstructed.