Why Roofs Need Cleaning in Singapore
Drone roof cleaning addresses a problem that every building owner in Singapore faces: rapid biological growth. Singapore's equatorial climate — constant warmth (25-33 degrees Celsius year-round), humidity consistently above 80%, and frequent rainfall — creates ideal conditions for algae, moss, and lichen to colonise roof surfaces. A freshly coated roof can show green algae growth within weeks of completion.
This biological growth is more than cosmetic. Algae retains moisture against roof surfaces, accelerating corrosion of metal decking, degradation of waterproofing membranes, and deterioration of protective coatings. Moss root structures penetrate into tile joints and membrane seams, creating leak pathways. A neglected roof covered in biological growth degrades two to three times faster than a clean roof in Singapore's climate.
Traditional roof cleaning sends workers onto the roof with pressure washers. This creates two serious problems. First, fall risk — rooftop falls remain a leading cause of workplace fatalities in Singapore, and the Ministry of Manpower (MOM) imposes strict safety requirements for any work at height. Second, roof damage — workers walking on metal deck roofs dent panels, tear waterproofing membranes, crack tiles, and damage flashing and edge trims. Drone roof cleaning eliminates both problems. Nobody steps on the roof.
What We Clean From Roofs
Green Algae
The most common roof contaminant in Singapore. Green algae forms a slippery film that spreads rapidly in humid conditions. Our hydro-jetting drone strips algae from metal, concrete, tile, and membrane roof surfaces.
Black Algae (Gloeocapsa Magma)
Dark streaks and stains caused by blue-green algae. Common on concrete tile and shingle roofs. These stains absorb heat, increasing roof temperature and building cooling costs. Our cleaning removes the organism and the staining.
Moss and Lichen
Thicker biological growth that roots into roof surfaces. Particularly damaging to tiles, joints, and membranes. Our drone pressure settings are calibrated to remove moss without damaging the substrate material.
Accumulated Dirt and Debris
Dust, sand, leaf litter, and airborne construction particles that accumulate in drainage paths, valleys, and around roof equipment. Blocked drainage channels cause ponding water, accelerating roof deterioration.
Drone Roof Cleaning Pricing
| Roof Type | Area | Price Range (SGD) |
|---|---|---|
| Small Commercial Roof | 200 — 500 sqm | $1,500 — $2,500 |
| Medium Commercial / Industrial | 500 — 2,000 sqm | $2,500 — $4,000 |
| Large Warehouse / Factory | 2,000 — 5,000 sqm | $3,500 — $5,000 |
| Combined Roof + Solar Panel Cleaning | Any size | 10% discount on combined |
| Annual Maintenance Contract | Any size | 15% discount per visit |
Prices include: CAAS permit, drone mobilisation, water supply, cleaning operation, and before/after photo documentation. No additional safety equipment charges — because nobody goes on the roof.
Roof Cleaning Process
Roof Survey
We fly the drone over the roof to assess contamination level, identify the roof material type, and plan the cleaning approach. This aerial survey also serves as a roof condition inspection — we note any visible damage, ponding areas, or maintenance issues at no extra cost.
Pressure Calibration
Water pressure is calibrated for the specific roof material. Metal deck roofs receive different pressure settings than concrete tiles. Waterproofing membranes receive the gentlest treatment. We test on a small area first to verify the setting.
Systematic Cleaning
The drone cleans the roof in systematic passes, working from the ridge to the eaves. Runoff flows naturally down the roof slope and into existing drainage channels. Heavy contamination areas receive multiple passes until clean.
Post-Clean Verification
After cleaning, the drone captures aerial images of the cleaned roof for before/after comparison. The images are delivered to the client along with any observations about roof condition, drainage blockages, or maintenance needs identified during the operation.
Roof Types We Clean
- Metal Deck Roofs — the most common commercial and industrial roof type in Singapore. Profiled metal sheets (Colorbond, Zincalume, galvanised steel) that accumulate algae in valley profiles and at fastener locations.
- Concrete Tile Roofs — common on older commercial buildings and condominiums. Porous tiles absorb moisture and provide an ideal substrate for moss and lichen growth.
- Flat Membrane Roofs — TPO, PVC, EPDM, and bituminous membrane roofs on commercial buildings. These require the gentlest pressure settings to avoid membrane damage.
- Coated / Painted Roofs — cool roof coatings and painted metal roofs that need cleaning to maintain reflective properties and reduce building cooling costs.
- Roofs With Solar Panels — combined roof and solar panel cleaning in a single visit. The drone cleans both the exposed roof surface and the panel surfaces for a comprehensive rooftop maintenance service.
Areas We Serve
We provide drone roof cleaning across Singapore including commercial buildings in the CBD, Orchard Road, and suburban commercial centres, industrial premises in Tuas, Jurong, Woodlands, Changi, and Loyang, warehouses and logistics facilities at Pandan, Defu, Kranji, and Pioneer, and condominium common area roofs island-wide.
Frequently Asked Questions
Get a Free Roof Cleaning Quote
Tell us your building address and roof type — we reply with a fixed-price quote within 24 hours.