Façade Mock-Up Pre-Fabrication Scope and Acceptance Review

The checklist

Design Documentation

1. 1Verify mock-up scope matches contract drawings and defined elevations/grids using latest IFC, RFI, and addenda; acceptance: marked-up drawings issued, discrepancies logged, and minutes signed by designer and contractor.
2. 2Confirm shop drawings for mock-up include plans, elevations, sections, fixing details, and tolerances; method: cross-check against model; acceptance: current revision stamped “For Mock-Up”, transmittal recorded in DMS.
3. 3Review structural calculations for panels, anchors, and brackets against design actions; method: engineer review; acceptance: capacities meet specified loads per approved project specifications; evidence: signed calc package.
4. 4Validate movement allowances (story drift, thermal, creep) at head, sill, jambs; method: compare detail gaps to movements; acceptance: movement capacity ≥ specified values; evidence: annotated details and movement table.
5. 5Run clash detection at the mock-up zone (structure, MEP, façade anchors); method: BIM clash report; acceptance: zero hard clashes, soft clashes resolved; evidence: report ID and screenshot set.

Materials and Samples

1. 6Approve control samples for glass, metal finish, sealants, gaskets under D65 lighting; method: visual booth and spectrophotometer; acceptance: ΔE ≤ 2.0 and gloss within ±5 GU; evidence: readings and photos.
2. 7Verify product data sheets, CWCT/ETAG-equivalent durability info, and warranties; method: collect PDFs; acceptance: meets specified durability and warranty terms; evidence: logged in DMS with version control.
3. 8Confirm sealant/primer and substrate compatibility; method: lab adhesion and staining reports; acceptance: cohesive failure ≥ 95% after conditioning; evidence: certified test reports with batch/lot numbers.
4. 9Check fasteners and anchors material grade and corrosion protection; method: spec sheet review; acceptance: grade and coating per environment (e.g., marine); evidence: datasheets and material certificates.

Performance and Testing

1. 10Define mock-up test matrix (air, water, structural, serviceability) and sequence; method: draft ITP/test plan; acceptance: stakeholders sign-off; evidence: approved plan with hold/witness points.
2. 11Set performance thresholds: air leakage ≤ stated m³/h·m² at ΔP = 75 Pa; water penetration: none at specified pressure for duration; acceptance: numeric limits documented; evidence: criteria sheet attached.
3. 12Confirm calibrated instruments availability (manometers, spray rack flow meters, LVDTs); method: check calibration certificates; acceptance: calibration within 12 months; evidence: serial numbers and expiry dates.
4. 13Agree spray pattern and rate for water testing; method: nozzle check and timed collection; acceptance: uniform coverage at target L/(min·m²); evidence: flow verification photos and measurements.
5. 14Set deflection and residual displacement limits for structural cycles; method: engineering review; acceptance: not exceeding specified limits; evidence: acceptance table and measuring method defined.

Interface and Tolerances

1. 15Detail interfaces to structure, adjacent cladding, windows, and MEP; method: interface matrix; acceptance: responsibilities assigned and signed by all trades; evidence: published matrix.
2. 16Publish dimensional tolerances: frame squareness ≤ 2 mm/1 m, joint width 8–12 mm, flatness ≤ 2 mm/1 m; acceptance: tolerance table issued; evidence: included on drawings and ITP.
3. 17Verify embed and edge distances suit anchors; method: total station survey; acceptance: location deviation ≤ ±5 mm; evidence: georeferenced survey report and layout photos.
4. 18Confirm continuity of air, vapor, and thermal barriers at interfaces; method: detail review and mock-up sequencing; acceptance: uninterrupted layers; evidence: redlined details and checklist sign-off.

Constructability and Installation Method

1. 19Review installation sequence, access, and lifting; method: method statement and rigging plan; acceptance: crane capacity verified, lift points detailed; evidence: stamped method statement and lift plan.
2. 20Define torque values for mechanical fixings; method: manufacturer data and torque wrench selection; acceptance: torque range documented; evidence: tool calibration and preset photos.
3. 21Plan storage and weather protection for components; method: storage plan and dataloggers; acceptance: RH ≤ 60% for sealants and gaskets; evidence: datalogger records and photos.

Quality Records and Approvals

1. 22Issue controlled drawing set with revision matrix; method: DMS control; acceptance: superseded versions archived; evidence: transmittal and approval stamps.
2. 23Assign witness/hold points and signatories (designer, façade engineer, GC, lab); method: responsibility matrix; acceptance: names and digital signatures captured; evidence: role list in checklist.
3. 24Conduct final pre-fabrication go/no-go review; method: meeting with action tracker; acceptance: all actions closed within 48 h; evidence: signed minutes and fabrication release.

Preview the printable checklist

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

At a glance

• Establish a single, shared source of truth for façade mock-up scope by locking visual benchmarks, performance thresholds, and interface tolerances before procurement. This reduces ambiguity, aligns suppliers, and enables faster approvals with measurable evidence.
• Mitigate rework risk by verifying drawings, materials, compatibility reports, and test equipment calibration before committing to production. Agreed acceptance criteria help prevent color mismatches, water ingress failures, and anchor misalignments on the built mock-up.
• Interactive online checklist with tick, comment, and export features secured by QR code.
• Improve traceability and accountability through documented sign-offs, survey uploads, and photo records. Clear roles, witness and hold points, and a controlled revision matrix streamline change management and preserve a defensible audit trail throughout fabrication.

How to Use This Interactive Pre-Fabrication Mock-Up Checklist

1. Preparation: Gather latest IFC/shop drawings, interface matrix, control samples, test plans, calibration certificates, and material submittals; bring measuring tools, spectrophotometer, torque references, and a camera.
2. Open the checklist on a tablet or laptop; create a new session titled with project, location, and date to keep evidence organized and traceable.
3. Walk through each group in order (Design Documentation, Materials, Performance, Interfaces, Constructability, Quality Records), attaching photos, readings, and files directly to relevant items.
4. Using the Interactive Checklist: Tick pass/fail, add comment threads for clarifications, and assign actions with due dates to responsible stakeholders.
5. Upload calibration certificates and survey reports; record instrument serial numbers, lots, and batch data in the item comments for future recall.
6. Generate an export to PDF/Excel with embedded photos and evidence. Enable QR authentication to lock the revision and prevent unauthorized edits.
7. Sign-Off: Capture digital signatures from the designer, façade engineer, general contractor, and supplier; distribute the export and archive it in the project DMS.

Define Scope and Visual Benchmarks Early

Establishing a precise façade mock-up scope avoids disputes later. Start by fixing what the mock-up must demonstrate: representative bays, corner conditions, joints, and typical interfaces. Agree visual acceptance criteria using control samples under consistent lighting (D65) and agreed viewing distances. Document measurable cues—color delta E, gloss units, texture grain, and joint alignment—so the inspection is objective, not subjective. Lock in joint width targets and joint sealant profiles with clear diagrams. Capture all outcomes in a controlled document set and share with stakeholders. Evidence should include dated photos of samples, spectrophotometer readings, and a signed comparison sheet against the designer’s intent per approved project specifications and authority requirements. With these references, later discussions focus on facts rather than opinions, minimizing schedule risk and costly rework.

• Use D65 lighting and fixed viewing distance for visual checks.
• Record ΔE, gloss, texture, and joint alignment numerically.
• Include corners and interfaces within the mock-up scope.
• Attach photos and readings to a signed benchmark sheet.

Set Performance and Testing Before Fabrication

Define the performance test matrix and numeric thresholds now. Capture air leakage limits at a stated pressure differential (e.g., 75 Pa), water penetration acceptance (zero leakage at target pressure for a set duration), and structural/deflection limits across service and proof stages. Confirm calibrated instruments and a safe test setup, including spray rate verification and pressure control. Map hold and witness points in an Inspection and Test Plan so responsibilities are clear. Include methods for recording results (manometer logs, flow rates, displacement readings) and specify photo and video evidence. When stakeholders agree on exact procedures and limits, the mock-up trial becomes a confirmation exercise rather than an experiment, reducing the chance of retests and preserving program float.

• Publish numeric limits with pressure and duration stated.
• Verify instrument calibration within the last 12 months.
• Document spray rate checks and pressure ramp steps.
• Define hold/witness points and evidence requirements.

Lock Interfaces, Tolerances, and Responsibilities

Interfaces are the usual cause of field failures. Build an interface matrix covering structure, adjacent cladding, windows, and MEP penetrations. Publish dimensional tolerances that fabrication and installation can achieve—frame squareness, flatness, joint widths, and anchor positioning—so measurements in the mock-up are unambiguous. Confirm continuity of air, vapor, and thermal barriers at transitions, and verify embed edge distances via survey to avoid live-site drilling changes. Finally, formalize responsibilities, approvals, and document control so revisions are tracked and superseded sets are quarantined. These steps create a robust baseline for factory release and streamline the eventual site installation.

• Issue a signed interface and responsibility matrix.
• Set realistic, measurable tolerances for all assemblies.
• Survey anchor locations; limit deviations to acceptable ranges.
• Control revisions with a strict DMS workflow.