Horizontal Sunshade Alignment and Projection Inspection Checklist

Inspect horizontal sunshade alignment and projection tolerance to keep façades true, consistent, and within project limits. This checklist focuses on horizontal shading elements—such as louvers, fins, and overhang blades—verifying levelness, straightness, uniform projection, and cumulative drift across the elevation. It excludes vertical screens, structural capacity checks, and unrelated façade components. Using calibrated tools, clear control lines, and repeatable methods, you will confirm that each unit matches the design intent and that long runs remain visually continuous. By catching millimetre-level errors early, you avoid rework, water traps, noisy joints, and uneven shadows that undermine performance and appearance. The outcome is a documented, defensible record of compliance per approved project specifications and authority requirements, including photos, readings, and sign-offs. Start in interactive mode to tick items, add comments where conditions vary, and export as PDF/Excel. Use the embedded QR to secure verification and streamline field-to-office communication.

• Establish reliable control lines and calibrated instruments to verify horizontal sunshade levelness, straightness, and projection at installation. Capture measurements in millimetres, compare against specified tolerances, and flag any drift early to prevent compounding errors across long elevations.
• Apply repeatable measurement methods: digital level for slope, laser/total station for alignment, and calibrated steel tape or laser distance meter for projection. Use gauge blocks or spacers to accelerate checks while maintaining accuracy and consistency among inspectors.
• Document evidence with geo-tagged photos of benchmarks, readings, bracket settings, and as-built markups. Secure approvals from responsible parties and record any corrective actions. Maintain traceability to drawings, lot numbers, and tool calibrations for robust closeout.
• Interactive online checklist with tick, comment, and export features secured by QR code.

Preparation and Controls

• 1. Review approved drawings to identify design projection L, datum lines, grid references, and specified tolerances; note special corner or transition details for targeted checks.
• 2. Verify calibration certificates of laser level, digital level, laser distance meter, and total station; record serial numbers, calibration dates, and responsible party signatures.
• 3. Establish horizontal datum line on façade using total station; mark control points every 3–6 m; photo each mark with tape measure reference.
• 4. Confirm environmental conditions suitable for measurement: wind < 8 m/s, surfaces dry, temperature within tool operating range; log conditions in checklist.

Alignment Verification

• 5. Check blade levelness with digital level (1 m base); acceptance: slope 0.0% ± 0.2% unless otherwise specified; attach level reading photo.
• 6. Verify straightness along blade front edge using laser line or tight stringline over 3 m; acceptance: deviation ≤ ±3 mm; record max gap with feeler gauge.
• 7. Confirm vertical spacing between stacked horizontal sunshades against drawings using steel tape; acceptance: spacing within ±3 mm; capture measurement at both ends and mid-span.
• 8. Assess cumulative alignment across elevation with total station shots at ends and each grid; acceptance: drift ≤ ±5 mm over 20 m; upload station report.

Projection Measurement

• 9. Measure projection from façade reference plane to blade leading edge at left, mid, right using laser distance meter; acceptance: L ± 5 mm; record three readings.
• 10. Use calibrated gauge block/spacer matching design L to perform rapid projection checks at every bracket; acceptance: snug fit without force; photo any outliers.
• 11. Check uniform projection alignment across adjacent bays with stretched line at leading edges; acceptance: visible offset ≤ 3 mm; document with oblique photo.
• 12. Verify corner and return conditions: projection continuity around corners per detail; acceptance: variance ≤ ±4 mm; annotate drawing with actuals.

Fixings and Supports

• 13. Inspect bracket plumb and seatings with spirit level and square; acceptance: bracket face out-of-square ≤ 1 mm per 100 mm; photo before blade install.
• 14. Confirm shim/pack thickness matches as-built projection corrections; acceptance: total shim stack ≤ 6 mm unless detailed otherwise; record location and thickness.
• 15. Verify fastener torque using calibrated torque wrench per manufacturer; acceptance: within specified range; record torque values and lot numbers.
• 16. Ensure thermal movement slots are centered after alignment so projection remains within tolerance through temperature swings; photo slot position and clearances.

Alignment Verification

• 17. Check joint alignment between successive blades; acceptance: step ≤ 2 mm at joints; capture close-up photo with scale.

Projection Measurement

• 18. Reconfirm projection after final tightening (settlement check) at representative bays; acceptance: remains within L ± 5 mm; log pre/post values.

Alignment Verification

• 19. Conduct sightline inspection at 5–10 m viewing distance under raking light; acceptance: no visible kinks or waves; upload annotated photos.

Documentation and Handover

• 20. Update as-built drawing with measured projections and alignment deviations; include station reports, tool certificates, and photo index.
• 21. Record nonconformities and corrective actions with dates, approvers, and retest evidence; close out per approved project specifications and authority requirements.
• 22. Obtain digital sign-offs from installer, QA/QC, and consultant; export checklist as PDF/Excel and attach QR-authenticated link.

Preparation and Controls

• 23. Confirm reference to façade control grid and story levels with independent cross-check by a second inspector; sign dual verification section.

Fixings and Supports

• 24. Verify end-of-run terminations maintain design projection and alignment with closure caps; acceptance: variance ≤ ±3 mm; photograph final condition.

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