Roof Wash Auckland – Protect Your Home From Unsightly Microorganisms

New Zealand’s lush and temperate climate provides a perfect breeding ground for a variety of unsightly microorganisms that can take root on your roof and exterior walls. While they don’t typically pose health risks to homeowners, they can lead to structural damage if left unchecked.

In addition to detracting from your property’s aesthetic appeal, moss and lichen can damage the integrity of your roof and shorten its lifespan.


Mould is a common issue in New Zealand due to the country’s high rainfall and humidity. It thrives in damp conditions and releases spores into the air that can cause respiratory problems, exacerbate allergies, and aggravate asthma symptoms. The spores can also deteriorate building materials over time, creating structural issues.

Fortunately, there are ways to prevent the growth of mould on your home’s exterior and interior surfaces. For example, dry washing clothes outside rather than inside on a clothes horse, and fixing water leaks as soon as they occur. It’s also important to regularly clean your roof and exterior surfaces, and prune nearby trees to reduce shade.

Moss, mould and lichen can grow on exposed exterior walls and surfaces when they’re damp for extended periods of time. Keeping these surfaces dry will help them last longer and maintain their aesthetic appeal. Alternatively, a commercial grade moss, mould and lichen treatment can be applied to prevent future growth.


New Zealand’s lush, temperate climate provides the perfect conditions for a variety of organisms to grow on and around homes. While moss, algae, and lichen do not pose health risks to homeowners, they can be unsightly and cause damage to the surface of the roof over time. In addition, moss and algae can cause slippery surfaces, making them dangerous for those who are walking on the surface. Lichen is a unique organism that consists of fungi and algae in a symbiotic relationship.


The battle against unsightly moss, mould and lichen on your roof and exterior walls is constant in New Zealand’s climate. While they don’t pose any immediate health risks, if left unchecked they can cause serious damage to your home, potentially leading to leaks and structural failure.

Lichen causes severe damage to protective factory coatings and is extremely difficult to remove with water blast cleaning alone. The 3000 to 4000 psi water pressure used to remove this type of growth can actually damage the surface. Waterblasting is also not a permanent solution, as the lichen will regrow immediately from the residue of the cleaner.

A simple spray on application of an outdoor cleaner such as Bio-Shield will kill the lichen and allow the surface to clean up naturally with rainfall for up to 12 months without the need for water blast cleaning or scrubbing. It is best applied on a cloudy day to assist with a quicker kill.

Roof Cleaning

Roof cleaning is the process of removing dirt, organic material, and contaminants from a roof’s surface. It can be done through several methods, including power washing, chemical treatments, and manual scrubbing. A clean roof can improve your property’s curb appeal and extend its lifespan.

Moss, lichen and algae can damage your roof. Left untreated, they can lead to leaks and deteriorate the structural integrity of your home. Regular roof cleaning and a moss treatment spray helps prevent this and saves you the cost of a premature roof replacement.

Our Benzylamonium Chloride solution saturates your roof and kills the spores of moss & lichen, leaving it clean and dry and allowing rain to naturally assist in the removal. We can spray this at the same time as a roof wash Auckland or in conjunction with it. PROS Instant and effective, no water blasting (so less risk for your house), gutters can be washed at the same time.

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