Roof Treatment & Cleaning
Your roof is one of the most important parts of your home or building—but it’s also one of the most vulnerable. Moss, mould, and lichen don’t just look unsightly; they can become hazardous to your health and your property. When wet, these organisms can increase the weight of your roof by up to three times, adding dangerous strain to the structure. Left untreated, they also release acids that slowly eat away at roofing materials.
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At House Wash NZ, we specialise in safe, effective roof treatments and cleaning solutions designed to protect and extend the life of your roof—without the need for harsh scrubbing or damaging high-pressure washing.
Why Clean & Treat Your Roof?
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Prevent Structural Damage – Moss, mould, algae & pollutants damage & trap excess moisture, which leads to premature rotting of roof timbers, degradation of tiles, and costly leaks.
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Extend Roof Lifespan – Regular treatment can help your roof last up to 10 years longer.
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Protect Indoor Air Quality – Mould spores don’t just stay on the roof; they can spread into your home and affect the health of your family.
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Save Money – Preventative treatment is far more affordable than replacing your roof early.
Our Roof Treatment Service
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Our Roof-Clear Treatment is the safest and most effective way to protect and restore your roof.
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Removes moss, mould, algae, lichen & pollutants
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Applied with a fully biodegradable solution
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Safe for all roof types
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Prevents damaging acids secreted by growths
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Includes follow-up treatments for complete long-term protection
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Backed by a 2 Year Guarantee
Roof Washing vs. Roof Treatments
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Roof Treatments – Gentle, long-term solution. The treatment kills moss and mould, and over 3–4 months, wind and rain naturally wash away the decaying growths. This approach protects the roof surface from unnecessary wear.
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Roof Washing – Immediate results, suitable for surfaces that require a faster clean. Our soft wash methods ensure no damage to your roof while still removing stubborn grime.
For ongoing care, we also provide annual maintenance spraying, which prevents spores from taking hold in the first place.
Why Choose House Wash NZ?
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For many Reasons, because we are:​
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Guided by professionals with over 20 years in the industry
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Fully insured & safety-compliant
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Service images – Every job can come with photo evidence so you can see the transformation
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Our Roof-Clear Treatment is also available with a 1 year guarantee option.
Book a Roof Service Today
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Don’t wait until moss and mould cost you thousands in repairs or roof replacement. Protect your home, your health, and your investment today.
