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Water Leakage Case Study at Po Yip Building, Tsuen Wan: Entire-Floor Slab Seepage Inspection and Waterproofing Layer Assessment for Food Factory

Following the installation of a new whole-floor concrete slab, a chain food factory commissioned Silver Surveyors to conduct a comprehensive seepage risk assessment. Utilizing Fluke High-Definition Infrared Thermography, Silver Surveyors inspected floor slabs across 19 functional zones, including the dim sum preparation area, fermentation room, and hot kitchen. The inspection found no trapped water, scientifically verifying that "there is no evidence or indication of defects in the waterproofing layer." Silver Surveyors provided an expert elimination report, effectively safeguarding the client against potential unfounded claims from neighboring units.

Silver Surveyors

1/21/20262 min read

Waterproof Layer Inspection for Industrial Plant at 15/F, Block A, Po Yip Building, Tsuen Wan

Project Background

In June 2021, Silver Surveyors Limited was commissioned to conduct a post-construction waterproof layer inspection for the entire floor of Unit A, 15/F, Po Yip Building in Tsuen Wan. The unit was designated as a food processing factory, and the client required verification of the waterproofing integrity to prevent future equipment damage and hygiene risks.

Technical Approach & Inspection Highlights

Comprehensive Infrared Scanning

A Fluke high-definition infrared scanner was deployed to systematically survey 18 functional zones within the plant.

Temperature differential analysis identified potential moisture retention areas.

（Image: Infrared scanner detecting uniform temperature distribution across the floor）

Grid-Based Inspection Methodology

The floor was divided into 132 inspection points for precise data collection.

Compliance with Hong Kong Buildings Department’s seepage investigation guidelines.

Key Findings & Conclusion

No Hidden Moisture Detected: Infrared data showed uniform temperature distribution (＜0.3°C variation), indicating no water retention.

Waterproofing Compliance Confirmed: The construction met all regulatory standards.

Inspection Area: Dim Sum Zone Hot Kitchen Packaging Zone

Points Checked: 100 points 12 points 46 points

Result: No anomaly No anomaly No anomaly

Remarks: Stable temperature Even near heat sources Large-area consistency

（Survey unit point center area platform detection point）

（Survey unit: detection points on the kitchen floor）

（Survey unit's packaging area floor probe points）

Project Value

Risk Mitigation: Pre-emptive detection prevented potential production disruptions.

Legal Validity: Report signed by an RICS-certified surveyor, admissible as court evidence.

Silver Surveyors’ Insight

Industrial floor waterproofing requires scenario-specific scrutiny. This case demonstrates how systematic infrared scanning ensures both compliance and long-term operational safety.

Schedule a Similar Inspection

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