Roof Treatment versus a roof wash

There are a couple of options for getting a roof clean, and the option that will suit you depends on your end goal. Are you planning on having the roof painted after the wash? Or do you want to wash it because it is due for a clean? 

If it is the latter, a roof treatment could be a much better option for you as it's cheaper than a roof wash. Some of the other benefits are that it's quicker and less labour intensive. It's also gentler on roofing materials and uses much less water.

If you are wanting to have it painted, then a roof wash is the best option for you.

Coming home to clean & sparkly kinda gives you that ‘wahoo it’s Friday’ feeling

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Roof treatment

A roof treatment involves spraying a product onto the roof surface which kills lichen, moss and mould. The rain and sun gradually break down and remove the dead lichen, moss and mould. This process can take up to 12 months. Generally, results can usually be seen in the first 2 to 3 months with the moss and lichen changing colour.

The product we apply is an industrial-strength treatment (A lot of the products for this sort of work are diluted and so do not produce the end result our product does). The product is bleach-free, non-acidic and phosphate-free.

We are VERY particular about getting a thorough coverage and apply 2 treatments when we do the treatment to ensure a good soak and thus much better results. What this means is we treat the area, wait for it to soak in and then treat it again.

We also use a very concentrated mix and even more so if there is black mould. This costs us a lot more and the chemical is not cheap however we want to do the best we can to ensure the best results possible.

You can find out more about roof treatment here such as information on what a treatment involves, the process and the benefits of a roof treatment vs a wash and what to do if you are on tank water.

Roof wash

The second option is where we use our water blasting machines to wash away any lichen, moss, mould and grime from your roof. When we do a roof wash we also apply a complementary treatment which kills the mould spores and stops them from returning for at least two years. Many water blasting companies don’t apply the treatment after the roof wash and the nasties quickly return and you then need to repeat having your roof washed much sooner.

You can find out more information here on what types of roofs are not suitable for washes, the technique we use for safety when on a roof and more.

We are all about providing clean and happy.
Are you ready for clean?
Lets make it happen
Keep your roof cleaner
for longer

Talk to us to find out more about how our roof treatments

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Frequently asked questions

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When should you opt for a roof wash-over roof 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.

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We collect the water from our roof for drinking. Is my water safe to drink after the roof has been cleaned?

If you are on tank water for your drinking water, then the answer is yes, it is provided the downpipes are disconnected from the water tank and stay disconnected until there has been 25 ml of rain. Before reconnecting the tank, you can check the water coming off the roof has no smell or foaming. If smell or foaming occurs do not connect the tank until the water runs, clear. 

If we have only washed the roof but not applied a treatment the tanks can be reconnected straight after the wash.

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I am on tank water is a roof treatment suitable?

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 25 ml of rain. 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 25 ml of rain.

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I have a tiled roof can you wash it without breaking tiles?

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

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Can you wash my clear lights?

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.

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Will you need scaffolding to clean my roof?

9 times out of 10, we do not require scaffolding. Our guys will use a fall arrest system with harnesses and strops to wash the roof. They are fully trained at Working at Heights and using the fall rest systems. Here is some information about roof washes.

An annual house wash increases your paint life by %25
HELLO. If you need a gutter clean, you have come to the right place.

Blocked gutters can lead to
nasty business

Clean gutters are very important when it comes to preventative maintenance and stopping water seepage and dampness around your house. When they get blocked with leaves, grass and weeds, gutters lose their functionality and overflow which causes water seepage into the interior of a building.

This can unfortunately, cause major damage to the interior and exterior walls, lead to fascia boards rotting. Pooling water around foundations can cause erosion which weakens the walls, leading to foundation cracks and settling.

Gutter cleaning often gets forgotten so we have a reminder service to help you stay on top of the problem before it becomes one. We can contact you Every 3, 6 or 12 months depending on your requirements and come and ensure they are not blocked and the water can flow freely. 

How much will it cost to have my gutters cleaned?

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CUSTOMER CASE STUDY - Since they cleared the gutters, we have had more heavy rainfall and no more water leaking in.

We bought a house which has quite a lot of established trees around it. After the first heavy downpour rainwater staring leek into the kitchen. We rang Blast Away Guys who came out that day to assess and clear the gutters which were blocked and full of leaves and weeds.

Since they cleared the gutters, we have had more heavy rainfall and no more water leaking in. Given this is a new house we do not know how often the gutters are going to need clearing so Blast Away Guys are going to come and check them every 3months for the first year and give us a report and photos each visit. After a year we will have enough data to reassess how often it needs to occur.  Jonathan Harris – Whangarei

Read more

The most important time to have your gutters checked and cleaned is autumn and winter

This is because leaves fall in the colder months and collect in the gutters. In some properties it pays to check again in late spring-early to summer (depending on what trees surround the property and when they lose their leaves). Heavy wind and rain can cause real issues with water ingress if your guttering isn't kept clear of;

  • fallen leaves
  • broken twigs
  • children's toys
  • self-seeding plants
  • moss and lichen
  • birds nests

All sorts of waste material easily find their way into your guttering and spouting, causing blockages as well as mould and pest infestation. You often don’t notice the early signs of a clogged-up gutter until it’s too late, which is why regular maintenance is so important.

With years of experience in gutter cleaning services, Blast Away Guys have the right tools and equipment to work safely and efficiently.

Clean looks good.
Feels Great!

Clean is a great feeling and so is having someone else do it for you...

Especially when you would rather be off doing stuff that really matters

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Frequently asked questions

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I am on tank water will it affect the water in my tank?

If you are having your gutters flushed out and you are on tank water, the tanks should be disconnected while we complete the freshwater flush and reconnected afterwards.

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How much does gutter cleaning cost?

To get an accurate price it's best to ask us to quote as there are quite a few different factors that we consider when we are pricing, a gutter clean. This page gives you a bit of an indication of cost and the types of things we consider when we are pricing a gutter clean.

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What is involved in unblocking gutters and what happens with the gunk you clear from the gutter?

Our gutter clean is an internal gutter clean which we do by hand and generally from a ladder. Some customers request that we also flush the gutters out which involves an additional technique and tools as we apply a soft wash using one of our water blasters. We can also offer a more premium gutter clean, which involves soft washing the outside of the gutters as well as an internal clean of the inside. It is a good idea to discuss your requirements with us prior to getting us to create a quote. We quote the internal gutter clean separately from the external gutter clean so that you can decide if you would like us to do both or just one of the services.  When we unblock gutters we clear out all the debris and take it away from your property or alternatively you can use it as compost for your garden.

If your gutters need some serious attention, call Blast Away Guys today for a free quote or to schedule a gutter cleaning job.
An annual house wash increases your paint life by %25

Insect Control Treatments

Is the outside of your house covered in spider webs, but you can’t reach high enough to get rid of them? Or have you just scrubbed down the walls only to find new creepy crawlies a few days later? Blast Away Guys can help you remove spiders and cobwebs from the exterior of your house and ensure they don’t return for up to 6 months. With years of experience in residential house washing and commercial water-blasting and bug control, Pete and his crew offer efficient and affordable solutions to keep your house or business looking spic and span and free of bugs.


Keeping bugs and spiders at bay permanently can feel like a loosing battle. They often infest spaces outside your house that are hard to reach, or you clean up cobwebs one day only to find its inhabitants building new ones elsewhere within a short amount of time.


Here at Blast Away Guys we use a chemical for all outside bug and spider treatments. With our special equipment, our spraying nozzles can reach even the highest bug-infested places as well as tiny nooks and crannies. The entire process only takes between 15 and 30 minutes depending on the size of your house.


Our bug control treatment can easily be incorporated into your annual house-wash. Ideally, the spraying is done before the actual water-blasting while the cobwebs are still present. That way all spiders will have died by the time we clean your house and it’s just a matter of removing the remaining cobwebs. If spraying takes place after cleaning, quite often spiders simply crawl away during the house-washing and return later on.


We recommend undertaking bug control treatment at least twice per year. During the wet season, treatment lasts around 3 months as rain washes the application away a lot faster. During the dry season, your house will remain spider-free for up to 6 months.


Call Blast Away Guys today to receive your free quote and say goodbye to spiders for good.


Pest Control

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