Pressure Washing in Sai Kung

A single driveway or small patio takes 1-3 hours. A full house exterior typically takes half a day to a full day depending on size, number of storeys, and how much pre-treatment the surfaces need. Add drying time of a few hours before you walk on sealed or treated surfaces.

Once a year is the common rhythm for driveways and house exteriors in temperate climates. Humid or coastal areas may need it every 6-12 months because algae, mould, and salt build up faster. Waiting longer than 2-3 years lets organic growth bind to the surface, which raises the price of the eventual clean.

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.

It is one of the cheapest kerb-appeal upgrades before selling or renting out a property. Estate agents consistently list exterior cleaning among the highest return-on-cost pre-sale jobs because it changes first impressions for a few hundred, not a few thousand. It will not fix structural issues, but it makes photos and viewings noticeably better.

A proper quote lists: each surface and its approximate area, the method per surface (high pressure vs soft wash), pre-treatments or chemicals used, weed and moss removal, rinsing and tidy-up, and whether resealing or re-sanding is included. It should also state who supplies water and power, and what happens if rain forces a reschedule.

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.