Complete Rodent Control Manual: Rat-Proofing Urban Buildings in Hong Kong
Hong Kong is one of the world's most densely populated cities — abundant food sources and dense construction create ideal conditions for rodents. According to FEHD data, rodent complaints are consistently among the most common hygiene complaints from Hong Kong residents, affecting areas from old tenement blocks to upmarket residential districts.
Common Rodent Species in Hong Kong and Their Habits
Norway Rat: The largest common species, weighing up to 500g. Active on ground level and in drains, strong swimmers, prefer to burrow at ground level. Basements and drainage systems of old Hong Kong tenements are their main habitat. Roof Rat: Slimmer and excellent climbers. Typically active in ceilings, wall cavities and rooftops — the common rodent in high-rise residential buildings. House Mouse: The smallest, highly active and able to squeeze through gaps as small as 6mm. Kitchens and food storage areas are their most common haunts.
Common Rodent Entry Routes into Buildings
Drains and sewage pipes (most common); door and window gaps (a gap larger than 6mm at the door bottom is enough for a house mouse); air conditioning ducts and ventilation openings; holes where wires and pipes pass through walls; ceiling-wall joints; holes left from building construction.
Professional Rodent Control Solutions
Proofing works: Professional identification of all entry points followed by sealing with rodent-proof materials (steel mesh, metal plates, cement). This is the most fundamental rodent prevention measure. Bait station system: Bait stations with rodenticide are placed along active rodent routes, checked and replenished regularly. Suitable for long-term rodent management. Live traps: No poison used — rodents are captured for later disposal. Suitable for households with children and pets, or where species identification is needed. Electronic deterrents: Ultrasonic devices to repel rodents. Effectiveness varies by environment and species — generally used as a supplementary measure.