Roof cleaning Auckland: roof treatments and roof washing

A roof treatment involves spraying a product onto the roof surface which kills lichen, moss and mould. The product we use works by killing off the growth and spores and then the rain and sun gradually break down and remove the dead lichen, moss and mould. This process can take up to 12 months or in some cases where there is a thick covering of black mould up to 18 months. Generally, results can usually be seen in the first 2 to 3 months with the moss and lichen changing colour.

Some roofs will remain free of growth for up to 3 or four years and others will need to have an annual or biannual treatment it just depends on the roofing material and the environmental factors that surround the roof. For example, if there are large trees nearby this can cause moss and mould to grow more quickly. Commercial roofs generally need treating every year as they often do not have much of a pitch and so moulds and lichens tend to attach its self and grow better.

We hear this a lot. What sets us apart is our consistency, communication, and commitment to care. We show up when we say we will, do what we promise (and often more), and treat your home like it’s our own. You’ll notice the difference straight away.

We apply a treatment that targets moss, mould and lichen. It is left on the roof rather than rinsed away. The growth dies first, then sunlight, rain and weather gradually loosen and clear it. This can avoid the need for immediate washing on many roofs, although the right method still depends on the roofing material and its condition. The clearing time varies with the type and thickness of the growth.

Most customers see visible improvement within 2–3 months. For moss and lichen, full results are typically seen within 12 months. For black mould, it can take up to 18 months. This slow-release method is what makes the results last longer and keeps your roof in better condition.

We assess the roofing material, its condition and the surrounding areas before choosing how to treat it. Our technicians apply the treatment carefully and take reasonable steps to protect gardens and nearby surfaces. If the roof supplies a drinking-water tank, the downpipes must remain disconnected until the roof has received at least 30 mm of rainfall. Please tell us about tanks, sensitive plants or fragile roofing materials before the visit.

Not at all. We just need clear access to your roof and notice of any pets or access concerns. We’ll send you updates and can provide before-and-after photos for your records.

Yes. If you're selling your home, we can provide a Completion of Works Certificate confirming the treatment has been applied. It’s a great document to pass on to your real estate agent or potential buyers for peace of mind.

If you’re unsure, no problem — just send us a photo or let us take a look. We’ll assess your roof’s condition and give you a clear, honest recommendation with no pressure.

A roof wash gives you instant results. It removes visible moss, mould, grime, and lichen right away using a soft wash system. A roof treatment, on the other hand, is sprayed on and works gradually with the sun and rain over time. The roof wash delivers a dramatic visual improvement on the day, while the follow-up treatment we include helps prevent regrowth.

The risk depends on the roofing material, age, condition and washing method. We assess the roof before recommending washing. Where washing is suitable, we adjust the equipment, pressure and nozzles for the surface. We generally recommend treatment rather than washing for clay, slate and concrete tiles because they may be loose, brittle or vulnerable to damage. If a roof is fragile or unsuitable for washing, we will explain the safer options.

A wash removes the visible growth, but it doesn’t kill the spores buried deeper in the surface. That’s why we always apply a follow-up roof treatment after every wash. This helps prevent moss and mould from coming back quickly and gives you longer-lasting results from your investment.

There is no fixed timeframe. Regrowth depends on shade, nearby trees, airflow, roof pitch, roofing material and local conditions. After washing a suitable roof, we apply a follow-up treatment to help deal with remaining biological growth and slow its return. Some roofs need attention every year or two, while others may remain clear for three years or longer. We can recommend a maintenance interval after assessing the roof and its surroundings.

Yes, absolutely. This service is ideal for pre-sale presentation, real estate photography, open homes, and painting prep. It improves the appearance of your home instantly and can significantly boost curb appeal and buyer impressions.

Heavy lichen, black mould or more established growth will usually need a dual treatment. This means the whole roof, or the heavily affected areas, receives a second application during the same visit.

For extremely heavy growth, we may also recommend a gel treatment that remains on the affected areas for longer.

We assess the roof before starting and confirm the recommended treatment with you. The cost depends on how much of the roof needs the additional treatment.

• If you are getting your roof painted, then it will need to be washed.
• If you’re wanting your roof cleaned instantly and are not wanting to wait 12 months (sometimes this can be more like 6 months) then getting a roof wash would be the better option for you
• If you have quite a lot of black mould. Sometimes a roof treatment is not always that effective on black mould. This is generally only if the mould it quite severe.

Exterior cleaning can be completed throughout most of the year. The best timing depends on the service, the surface and the weather. We avoid conditions that could make the work unsafe or reduce the effectiveness of a treatment, such as heavy rain or strong wind. If the weather affects your booking, we will contact you and arrange another suitable time.

If you are on tank water you will need to disconnect the tanks prior to us arriving. They will need to stay disconnected until there has been 30 mm of rainfall. If you need help disconnecting the tanks please let us know.

The treatment product we use is 100% water-soluble. This means that the rain will wash it away even on a porous surface. To be really safe we recommend that water tanks stay disconnected until there has been 30 mm of rainfall.

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As a general rule, we don’t recommend water blasting tiles as they are often loose and water blasting can blow them off the roof which breaks them. The gentlest and cheapest option to get your roof clean is a roof treatment. If for some reason you really need to wash we will come and take a look at it and assess whether or not it is an ok candidate for a wash

We sure can. Our approach to cleaning clear lights is to apply our wash down product, followed by a soft wash.  Lastly, we apply a slow-release product that works overtime to keep cleaning them. If the clear lights are old, unfortunately, mould gets embedded into the fibre and we are not able to remove this so often they can be far from perfect. Any mould that is sitting on the surface should clean up nicely.

It depends on the roof’s pitch, height, condition and access. Where it is safe and appropriate, our trained technicians use suitable fall-protection equipment. Some roofs require scaffolding or an elevated work platform. We assess the access requirements before the work and explain any additional equipment in your quote.