Colorsteel, pressed metal, long-run iron, concrete and clay tiles
Roof cleaning and treatment in Christchurch
We soft wash roofs instead of blasting them, so coatings and tiles stay intact. A follow-up treatment keeps working on moss and lichen after we leave, for a cleaner roof for longer.
Overview
We soft wash roofs instead of blasting them, so coatings and tiles stay intact. A follow-up treatment keeps working on moss and lichen after we leave, for a cleaner roof for longer. Maidly provides roof cleaning for homes and businesses across Christchurch, from the central city to the coast and the Port Hills.
Why we don't water-blast roofs
High-pressure water can strip the protective coating from metal roofing, wear down the surface of concrete tiles and push water under flashings and laps. It also leaves moss spores behind, so growth returns quickly.
A soft wash uses a cleaning solution at low pressure to kill moss, lichen and mould at the root, then rinses the roof clean. It's gentler on your roof and gives a longer-lasting result.
What the treatment does
Some growth, especially lichen, is stubborn and holds tight to the roof. Our treatment keeps working after the visit. Over the following weeks, dead growth loosens and the weather washes it away, and new spores are slowed from taking hold.
What’s included
- Soft wash of the whole roof surface
- Moss, lichen and mould treatment
- Ridges, valleys and flashings cleaned
- Gutters checked and rinsed after the roof is done
- Photos of the finished roof
Every job is covered by our 100% work guarantee. If something isn’t right, we’ll come back and fix it. Roof cleaning and treatment are also guaranteed for 24 months.
Our method
- AssessWe check roof type, pitch, coating condition and safe access before starting.
- ProtectDownpipes, gardens and outdoor areas are protected from run-off.
- Soft washA cleaning solution is applied at low pressure across the whole roof.
- RinseThe roof is rinsed and gutters flushed to clear debris.
- TreatA treatment is applied to keep working on remaining growth over the following weeks.
Why it matters
Moss and lichen hold moisture against your roof, which speeds up corrosion on metal and breaks down concrete tiles. Cleaning and treating your roof protects one of the most expensive parts of your home.
A clean roof also means cleaner rainwater, less debris washing into gutters and a sharper-looking home from the street.
Roof cleaning FAQs
Will the moss disappear straight away?
Loose moss and mould come off during the wash. Lichen and stubborn growth can take a few weeks to fully clear as the treatment works and rain washes it off. That gradual result is normal and lasts longer than blasting.
Is soft washing safe for Colorsteel?
Yes. Soft washing uses low pressure and solutions suited to coated steel, so it cleans without damaging the coating. High pressure is what causes problems on coated roofs.
I collect rainwater. Can you still clean my roof?
Yes, but please tell us when you request a quote. We'll plan the job so your tank is disconnected during cleaning and treatment, and advise when it's safe to reconnect.
What if it rains on the day?
Light rain usually doesn't stop a wash, but the treatment needs a dry window to work properly. If the forecast is wrong for it, we'll reschedule with you.
Pairs well with
Related services
Book several services on one visit to look after the whole property at once.
Knowledge base
Helpful reading
Answers to the questions we’re asked most. Browse the knowledge base →
How often should you wash your house in Christchurch?
How often Christchurch homes need a house wash, roof clean, gutter clean and window clean, plus the signs it’s time and why regular washing saves money.
Read article →House washing · 4 min readSoft washing vs pressure washing: what’s the difference?
Soft washing and pressure washing explained: how each works, which surfaces need which, and why the wrong method can damage paint, roofs and timber.
Read article →House washing · 4 min readWhat’s the green and black stuff on my house?
The green, black and grey growth on your house is usually algae, mould or lichen. What each one is, why it grows, and how to remove it without damage.
Read article →Free quote
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Why Maidly
Premium cleaning. What sets us apart.
Maidly is a premium cleaning and property care company. Here’s what you get with us that you won’t get from a budget cleaner.
Premium, not budget
We’re a premium cleaning service, not a budget one. Every job is done properly, to a checklist, every time.
Vetted, trained team
Every team member is interviewed, background checked, skills tested and trained before working unsupervised.
Eco-friendly products
Biodegradable, low-impact products that are kinder to your family, pets, gardens and waterways.
Fixed, itemised quotes
You know exactly what’s being done and what it costs before we start. No surprise charges.
Guaranteed work
A 100% work guarantee on every service, plus 12 months on soft and pressure washing and 24 months on roof cleaning.
One team, inside and out
Residential, commercial, windows and exterior care from one fully insured team, with 10% of every booking given to a cause.