Driveway Cleaning in Newcastle

Know what you are looking at

The four things that actually stain a driveway

“Dirty” covers several different problems, and they do not all come off the same way. Working out which one is on the surface is most of the job.

Organic growth — algae, moss and lichen. The grey-green film, the black spotting and the pale crusty discs that look painted on. Algae and moss wash off readily once treated. Lichen is the stubborn one: it roots into the surface and has to be chemically treated and given time to work, not blasted, because the pressure needed to remove it mechanically will damage the concrete first.

Tannin from leaf litter. Wet leaves left sitting on pale concrete leach tannin into the pores and set as a brown, leaf-shaped shadow. Very common under jacarandas, gums and anything deciduous, and unmistakable once you know it. It is a stain, not a deposit — it needs a treatment that lifts it out of the surface. There is more on this on our tannin staining article.

Oil, fuel and transmission drips. The dark patch under where the car sits. Fresh oil that has not fully soaked in comes up well. Oil that has been there for years has penetrated deep into the concrete and will usually lighten substantially rather than disappear entirely — anyone promising a guaranteed complete removal on an old stain has not looked at it properly. We will tell you at quoting which of the two you have.

Rust and mineral staining. Orange runs from sprinklers and bore water, steel furniture, potted plants or rebar sitting too close to the surface. Rust needs a specific treatment; high pressure alone just cleans the concrete around it and makes the stain more obvious.

Surface by surface

Concrete, aggregate, pavers and stamped

Plain concrete is the most forgiving and takes a rotary surface clean. That is a flat, enclosed head that cleans in an even sweep rather than a hand-held wand waved back and forth — which is what leaves the zebra striping you see on a lot of driveways around the suburbs. Done properly the result is uniform right to the edges.

Exposed aggregate is the big one in the newer Newcastle estates, and it is the surface most often damaged by the wrong approach. The stones sit in a cement matrix, and too much pressure held too close washes that matrix out, loosens the stones and leaves the driveway rougher and dirtier than before — permanently. Aggregate is cleaned at moderate pressure with a pre-treatment doing the work on the growth.

Stamped and stencilled concrete has a colour hardener and a sealer over the top. High pressure strips the sealer, and once it is gone the colour fades unevenly and the surface starts absorbing everything. These are soft-washed and rinsed gently. If the sealer has already broken down, that is worth knowing before anyone touches it.

Pavers clean up extremely well, but the joint sand is the catch: too much pressure blows it out and the pavers start to shift and weed through. Paver driveways are cleaned at a controlled pressure and the joints are re-sanded where the wash has opened them up.

Timing

When to clean a driveway in Newcastle

Late winter into early spring is the window. June to August is when the damp does most of the work on algae and moss, so a wash in August or September clears the worst of it and leaves the driveway presenting well through summer. It is also the right time if the property is going on the market — the driveway is the first thing in the street-front photo, and a grey one drags the whole shot down.

For a rental changeover or a sale campaign the driveway rarely wants doing on its own. Cleaning the driveway and leaving the path, porch and house front untouched makes a property look half-finished rather than clean, which is the point our spring reset article makes at length.

More than the driveway

Paths, patios and the rest of the exterior

The same visit can take in everything else on the ground: paths, steps, porches, courtyards, patios, pool surrounds, retaining walls and the outer face of fencing. Doing them together is cheaper than doing them on separate visits — the cost sits in getting set up and getting water and gear to the property, not in the extra square metres.

Walls, render, Colorbond and eaves are a different method again: a low-pressure soft wash rather than a pressure clean. That is covered on the exterior house washing page.

One local contractor

Other property services in Newcastle

Driveway cleaning is part of the pressure washing service, one of five Gizzi Property Care runs across Newcastle. If the property also needs the outside kept up between washes it can go on the same schedule: lawn mowing and edging, garden maintenance and hedge trimming — one contractor, one quote. There is a full picture of the area on the property maintenance Newcastle page.

Local coverage

Suburbs we clean driveways in

Newcastle city and the inner suburbs — Merewether, Bar Beach, Hamilton, Islington, Mayfield, Carrington and Stockton — through the western suburbs of Lambton, New Lambton, Waratah, Jesmond, Wallsend, Elermore Vale, Maryland and Fletcher, south to Kotara, Adamstown Heights, Charlestown and Cardiff, and out across Lake Macquarie, Maitland, Port Stephens and the Hunter Valley. Jobs are grouped by nearby streets so travel stays efficient and the quoted price reflects it.