Websites for pressure washers.

It can, which is why siding gets soft washed instead. A wand at 3,000 psi forces water behind vinyl and aluminum, lifts paint, and etches a visible pattern into the finish. A soft wash uses a diluted bleach and surfactant mix at roughly garden-hose pressure to kill the algae and mildew, then a thorough rinse. The high pressure stays on the concrete where it belongs.

Yes, and without a pressure washer. Those streaks are an algae that feeds on the limestone filler in asphalt shingles, and it comes off with a soft wash applied at low pressure and left to work. Pressure washing a shingle roof strips the granules and voids the manufacturer's warranty, so any company offering to do that should be turned away.

Not if it is done properly. We soak the beds and lawn with plain water before we start, keep them wet during the wash, and rinse everything again when we are finished, which dilutes anything that lands to the point that it does no harm. Anything delicate close to the wall gets covered. Tell us about a garden you are worried about and we will plan around it.

Usually most of the way, not always all of the way. Fresh oil lifts well with hot water and a degreaser. Oil that has soaked into concrete for years leaves a shadow that lightens with each cleaning but may never fully vanish, and we would rather say so than promise a spotless slab. Asphalt is softer, so we go easier on it and use hot water sparingly.

Most houses every one to three years, sooner on a shaded north wall or under trees where the green comes back fastest. Driveways and walkways once a year keeps them safe and stops the mould from getting a foothold. Interlock benefits from re-sanding every few years and sealing every three to five, depending on the sealer and the traffic.

You do not need to be home for exterior work. We need an outdoor tap that works, cars moved off the driveway, windows and doors closed, and anything loose off the deck or patio. Let us know if the tap is shut off for the season or you are on a well with low flow, because we can bring water in a tank.