Pressure Washing in Kai Tak

Most residential pros use your outdoor tap and, for electric machines, an outdoor socket. Petrol-powered machines only need water. Some companies carry water tanks for properties without an accessible tap — ask in advance, as tank supply can add to the price. Water usage for a typical driveway job is modest, roughly comparable to a few loads of laundry per hour of cleaning.

Pressure washing uses high-pressure water and suits hard surfaces: concrete, pavers, brick. Soft washing uses low pressure plus a cleaning solution and is the right method for painted render, siding, roofs, and timber, where high pressure would strip paint, gouge wood, or crack tiles. A good pro will recommend soft washing for delicate surfaces without being asked.

Fresh oil mostly comes out with a degreaser pre-treatment plus hot-water pressure washing. Old oil that has soaked deep into concrete may only fade, not disappear — an honest pro will tell you this before quoting rather than promising full removal. Ask specifically whether stain treatment is included or extra.

Renting a machine costs a fraction of a pro visit, but consumer machines are slower, and the main risks are damage (etched concrete, stripped paint) and injury — a 3000+ PSI jet can cut skin. DIY makes sense for a small, flat concrete area. Hire a pro for two-storey walls, roofs, timber, render, or anything needing ladders or chemicals.

Generally no — external walls are common property managed by the owners' corporation or management company. Individual owners hire pressure cleaners for private areas: rooftops they own, village house exteriors, garden or podium areas, and car parking spaces.

October to February — the dry season. Cleaning during the humid months (especially the March-May damp season) gives the shortest-lived results because mould regrows within weeks on damp surfaces.