Driveways, paths, decks, patios, car parks and large concrete areas collect grime, moss,
algae and organic matter faster than most people expect. Left untreated, dirty surfaces look
neglected, become slippery and unsafe, and get harder to restore the longer they are left.
Blast Away Guys provides professional concrete and deck washing for homes and businesses across Northland and Auckland. We use soft washing and pressure washing
depending on the surface, removing built up dirt, mould, mildew, algae, rust stains and
organic matter without causing damage.
Moss, mould, algae and organic matter break down surface materials over time, shortening
the lifespan of driveways, decks and paths. Wet organic growth also creates slip hazards,
particularly on driveways, steps and deck boards. Most surfaces benefit from a professional
clean once a year to stay safe, presentable and well maintained.
Not every surface should be pressure washed. High pressure water can strip sealants,
damage timber decking and pit softer concrete if used incorrectly. Our team assesses each
surface before starting and uses the right equipment and pressure for the job.
We use commercial grade equipment designed to clean evenly and avoid swirl marks or
streaking. For hard to reach exterior concrete walls and building facades, our long telescopic
attachments reach up to 15 metres high, so there is no need for a cherry picker and the job
gets done faster at less cost to you.
For larger commercial concrete areas, we use ride-on and wide area cleaning equipment to
cover more ground efficiently without compromising on the result.
Before washing, we apply a cleaning solution to loosen mould, algae and built up grime. Once the wash is complete, we apply a professional mould and algae treatment as part of the same visit.
Concrete may look solid, but it behaves much like a hard sponge. Its tiny pores can hold moisture and shelter mould and algae below the surface.
Washing removes visible dirt and growth. However, small changes in water pressure, nozzle distance and wand angle can affect each pass across the concrete, and biological growth within the pores may remain.
Over the following two to four weeks, moisture and uneven regrowth can make the washing passes become visible again as dark or green streaks.
Our treatment targets remaining biological growth and continues working after we leave. Over the next three to four weeks, the concrete often becomes lighter and the finish visually evens out as the remaining biological residue breaks down.
Read more about moss, mould and lichen treatments.
Washing gives an immediate improvement, with further brightening and a more even appearance often developing over the following three to four weeks. Treatment helps reduce streaking associated with remaining mould and algae and slows regrowth, helping keep the surface cleaner for longer.
Existing stains, wear, surface damage and natural variations in the concrete may remain visible. The treatment is not a concrete sealer, does not close the pores and cannot repair damaged or etched concrete.
After washing, we apply a mould and algae treatment to address remaining biological growth and help keep the surface cleaner for longer than washing alone. How quickly growth returns depends on moisture, shade, the surface and its surroundings.
Our business was built on care, reliability and making customers happy. Every quote is
backed by our Love Clean Guarantee: if you are not thrilled with the result and we cannot fix
it, you do not pay a cent.
We also believe in clear communication from start to finish. You will always know what is
happening, who is arriving, what is included, and what comes next.
Before each job, we send a short image rich profile of the team member visiting so you can put a friendly face to the name and know a little about who is working on your property.
We take the time to explain your options in plain language so you can choose the solution that best fits your property, goals and budget.
We service Whangarei, the Bay of Islands, and wider Northland, with Auckland services also available.
Whether it is a single residential driveway or a multi level commercial car park, we provide fast quotes and respond within one to two hours during business hours.
If possible, we recommend clearing the area of vehicles, planters, or outdoor furniture to allow for a more thorough clean. If there are any access issues or large items you need help with, just let us know ahead of time.
Yes. Our cleaning process removes organic build-up like moss and algae that makes surfaces slippery. After we’re done, your concrete will be safer to walk or drive on — particularly useful in shaded zones or before winter.
The post-wash mould treatment significantly slows down regrowth, so most surfaces stay clean for 6–12 months. Shady or damp areas may need more frequent treatment. Our goal is not just to clean the surface but to help it stay that way for longer.
Absolutely. We adjust the pressure, cleaning method, and detergent type based on your surface. This ensures decorative, stamped, or coloured finishes are not damaged. We’ve cleaned everything from exposed aggregate to dyed driveways with excellent results.
Yes. Our high-powered concrete-safe process is effective at lifting black mould, green algae, moss, and even stubborn tyre marks. For oil stains or heavy discolouration, we use specialised degreasers where needed. You’ll see a brighter, more even surface with improved safety and presentation.
Choose house washing, roof treatments, bug treatments, chimney sweeping and more, all in one coordinated visit. Ask us to price the services separately and together so you can compare the options.
