What Is Facade Drone Inspection?
Facade drone inspection is the use of unmanned aerial vehicles equipped with high-resolution cameras and thermal sensors to visually assess the external surfaces of a building. In Singapore, this service is primarily used for BCA periodic facade inspection (PFI) compliance, where buildings taller than 13 metres and older than 20 years must undergo facade assessment every 7 years under the Building Control Act.
Traditionally, facade inspection required rope access teams, building maintenance units (BMUs), or full scaffolding — methods that are expensive, slow, and carry significant safety risks. A drone completes the same inspection in a fraction of the time. A 20-storey building that would take rope access teams 2-3 weeks can be surveyed by drone in 2-3 hours, capturing thousands of high-resolution images that cover every square metre of the facade.
Singapore's BCA published TR 78 — a technical reference specifically for drone-based facade inspections — establishing camera specifications, flight parameters, image overlap requirements, and reporting standards. This framework legitimises drone inspection as a compliant method for PFI submissions. Our inspections follow TR 78 methodology precisely, ensuring every report meets BCA submission requirements.
BCA Periodic Facade Inspection — Why It Matters
The BCA periodic facade inspection regime exists because Singapore's tropical climate aggressively degrades building facades. High humidity, intense UV radiation, frequent heavy rain, and thermal cycling cause concrete spalling, tile debonding, sealant failure, and cladding deterioration. These defects pose real safety hazards — falling facade elements can injure or kill pedestrians.
Building owners are legally required to engage a competent person — a Professional Engineer (PE) or Registered Architect (RA) — to inspect and report on facade condition. Failure to comply carries fines of up to $10,000 and potential prosecution. The PFI report must document all identified defects, assess their severity, and recommend remedial actions.
Drone inspection supports the competent person by providing comprehensive, geo-tagged imagery of the entire facade. The PE or RA reviews this data to produce their professional assessment. Many competent persons now specifically request drone data because it provides more complete coverage than visual observation from a gondola or rope access platform, where inspectors can only examine what is directly in front of them.
Our team coordinates directly with your appointed PE or RA. We capture the data they need, in the format they need, and deliver it within their reporting timeline. If you need a competent person recommendation, we can refer you to registered professionals in our network.
TR 78 Compliance — How We Meet BCA Standards
TR 78 sets specific technical requirements for drone-based facade inspections. Our operations meet every requirement specified in the technical reference.
Camera Resolution
TR 78 requires minimum resolution capable of detecting defects at specified distances. We use 48MP cameras that exceed the minimum requirement, capturing defects as small as 0.5mm hairline cracks from standard operating distances.
Image Overlap
Our flight plans ensure 80% frontal and 60% side overlap between images. This guarantees complete facade coverage with no blind spots, and enables photogrammetric reconstruction of the facade surface.
Flight Parameters
Drone speed, altitude, and distance from the facade are controlled to maintain consistent image quality. We fly at 3-5 metres from the facade surface for optimal resolution, adjusting for wind conditions and building geometry.
Defect Classification
All identified defects are classified by type (crack, spall, stain, delamination) and severity (cosmetic, moderate, severe, critical). Each defect is geo-tagged to its exact facade location using GPS coordinates and facade grid references.
Our Facade Drone Inspection Process
Site Assessment and Planning
We review building drawings, assess surrounding airspace restrictions, identify potential flight hazards (nearby buildings, antenna, overhead cables), and prepare a detailed flight plan. CAAS activity permits are applied for and secured before the inspection date.
Pre-Flight Safety Briefing
On inspection day, our team conducts a safety briefing with site management. We establish exclusion zones, brief security personnel, and confirm weather conditions are suitable for flight. All operations follow our Standard Operating Procedures (SOPs) approved by CAAS.
Drone Data Capture
Our pilots systematically scan every facade elevation using pre-programmed flight paths. High-resolution visual and optional thermal imaging data is captured with full overlap coverage. A typical 20-storey building requires 2-3 hours of flight time.
Image Processing and Analysis
Captured imagery is processed to create a complete facade mosaic. Defects are identified, annotated, classified by severity, and mapped to a facade grid. Hidden defects are flagged using thermal anomaly analysis where applicable.
Report Delivery
A comprehensive inspection report is delivered within 5-10 working days. The report includes annotated imagery, defect inventory, severity classification, facade condition assessment, and recommended remedial actions — formatted for direct use by the appointed competent person for BCA submission.
Drone vs Rope Access vs Scaffolding — Facade Inspection Comparison
Building owners and MCSTs often ask how drone inspection compares to traditional methods. Here is a direct comparison based on typical Singapore projects.
| Factor | Drone Inspection | Rope Access | Scaffolding |
|---|---|---|---|
| Cost (20-storey building) | $5,000 — $10,000 | $15,000 — $30,000 | $50,000 — $100,000 |
| Time for data capture | 2-3 hours | 2-3 weeks | 4-6 weeks (incl. setup) |
| Safety risk | Zero fall risk | High — working at height | Moderate — erection risks |
| Disruption to occupants | Minimal — no road closures | Moderate — window obstructions | High — extended scaffolding |
| Coverage | 100% facade coverage | Partial — limited to accessible areas | Near-complete — but slow |
| Image quality | 48MP, geo-tagged | Handheld camera, variable quality | Handheld camera, variable quality |
| BCA TR 78 compliant | Yes | N/A — different methodology | N/A — different methodology |
Facade Drone Inspection Pricing in Singapore
Our facade inspection pricing is transparent and based on building size, height, and complexity. Every quote is fixed — no hidden charges.
| Building Type | Height | Price Range |
|---|---|---|
| Low-Rise Residential (HDB, condo) | 5-10 storeys | $3,000 — $5,000 |
| Mid-Rise Commercial | 10-20 storeys | $5,000 — $10,000 |
| High-Rise Tower | 20-40 storeys | $8,000 — $15,000 |
| Super High-Rise / Complex Facade | 40+ storeys | $12,000 — $20,000 |
| Add-on: Thermal Imaging | Any height | +$1,500 — $3,000 |
Prices include: CAAS permit application, drone data capture, image processing, defect mapping, and comprehensive inspection report. Competent person (PE/RA) fees are separate as they are engaged independently by the building owner.
Types of Facade Defects We Detect
Our high-resolution cameras and thermal sensors detect a comprehensive range of facade defects found on Singapore buildings.
- Concrete Spalling — exposed reinforcement bars and delaminating concrete caused by carbonation and chloride ingress in Singapore's coastal and humid environment.
- Tile Debonding — detached or bulging tiles that risk falling, detectable through visual inspection and confirmed via thermal anomaly signatures.
- Crack Mapping — hairline to structural cracks classified by width, length, direction, and pattern. Our 48MP cameras detect cracks as narrow as 0.5mm.
- Sealant Deterioration — failed or degraded sealant joints around windows, expansion joints, and panel connections — a primary cause of water ingress.
- Water Staining and Efflorescence — white salt deposits and water stains indicating active water seepage through the facade system.
- Cladding Defects — loose, misaligned, or corroded cladding panels, fixings, and support systems identified through close-range visual capture.
Singapore Areas We Serve
We conduct facade drone inspections across all of Singapore. Our team is experienced with the specific airspace requirements and CAAS regulations for every area, including controlled airspace near Changi Airport, Paya Lebar Air Base, and Seletar Airport.
Common inspection locations include the CBD and Marina Bay commercial towers, Orchard Road retail facades, Tanjong Pagar and Shenton Way office buildings, HDB estates island-wide, and condominium developments in Bukit Timah, East Coast, Sentosa, and Jurong. We also serve industrial building facades in Tuas, Jurong Island, and Changi Business Park.
Frequently Asked Questions
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