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Big Deal Exterior Cleaning

Lift the black streaks

Roof Cleaning in Sydney

Roof cleaning removes moss, lichen and the black algae streaks caused by Gloeocapsa magma from tile, concrete and Colorbond roofs. A professional soft wash treats the growth chemically at low pressure, which avoids the granule loss, cracked tiles and water ingress that high-pressure roof blasting commonly causes.

Which suburb are you in?

We cover Greater Sydney — we'll confirm availability for your street.

Step 2 of 3: Suburb

Free quote

From
$450
Typical duration
3–6 hours depending on roof size and growth
Recommended every
Every 18–24 months
Covers
7 inclusions

Lift the black streaks

Roof cleaning in Sydney, done properly.

We assess your roof, choose a suitable cleaning method and remove built-up moss, lichen and grime with care.

Careful preparationAttention to detail

What's included

  • Roof safety setup and full exterior site protection
  • Gutter clear-out so runoff has somewhere to go
  • Soft wash treatment of tiles, ridge capping and valleys
  • Moss, lichen and black algae removal
  • Solar panel masking where panels are installed
  • Garden, path and driveway rinse-down afterwards
  • Photo report of the roof before and after

Surfaces we work on

Concrete and terracotta roof tilesColorbond and metal roof sheetingRidge capping and valleysSkylights and roof windowsAwnings and patio roofingCarport and shed roofs

What it costs in Sydney

Roof cleaning is quoted on roof area, pitch, access and the amount of lichen present. Most Sydney homes fall between $450 and $1,200. Gutter cleaning is normally bundled at a reduced rate.

How often: Every 18–24 months; sooner under heavy tree cover.

Get my fixed price0452 605 100

Useful answers

Roof cleaning questions, answered.

Is pressure washing bad for a roof?
High-pressure washing can damage a roof. On concrete tiles it strips the protective surface granules, which accelerates deterioration. On any tiled roof it can crack tiles and force water under the laps, leading to leaks. A low-pressure soft wash achieves the same visual result without those risks, which is why it is our default method.
What causes the black streaks on my roof?
The black streaks are a blue-green algae called Gloeocapsa magma. It travels by air, settles on the roof and feeds on the limestone filler used in concrete tiles. It is most visible on north and west-facing slopes and in humid, shaded Sydney suburbs. It is a living organism, so it must be killed rather than simply washed off.
How often should a Sydney roof be cleaned?
Most Sydney roofs benefit from a clean every 18 to 24 months. Homes surrounded by gum trees, in shaded valleys or close to the coast can need attention every 12 months because moisture lingers longer and organic growth returns faster.
Do you clean the gutters as part of roof cleaning?
We always clear the gutters first so runoff from the roof has somewhere to go, and we include a full gutter clean with roof cleaning at a reduced combined rate. Cleaning a roof over blocked gutters simply pushes debris into the downpipes.
Will roof cleaning damage my solar panels?
No. We mask and protect solar panels before treating the roof, and we can clean the panels themselves at the same time. Telling us about panels when you request a quote lets us allow the right time and protection for them.

On the tools

Straight from a Big Deal workday.

No stock photos — this is our crew, our gear and Sydney properties being cleaned the soft wash way.

Big Deal technician pressure washing a light blue metal roof in Sydney
Roof cleaning in progress — corrugated metal roof being soft washed by Big Deal
Big Deal technician cleaning a house window with a water-fed brush
Pressure washing wand at work on a metal roof, water stripping away the grime
Big Deal technician rinsing a corrugated roof clean on a sunny Sydney day
The Big Deal team reviewing a job on site before starting the clean
Big Deal crew member with leaf blower in front of the pressure washing trailer
Big Deal crew member washing a Sydney roof with the trailer rig below
Big Deal technician in respirator applying soft wash solution

Customer feedback

Real jobs, real Sydney properties.

“I can't recommend them enough! From the quote until the house was shining again we had an excellent communication, transparency and fair price, thanks to Leo and his team, always polite and professional.”

Juan Andrade

Mosman

“Leo and the team did an amazing job cleaning our roof, gutters, and driveway. They were professional, punctual, and paid great attention to detail. The house looks brand new again.”

Paola Desirre Henrique

Castle Hill

“Outstanding work! I was blown away by the team's professionalism and their eye for detail. The final result far exceeded my expectations. Not only did they leave my home spotless, but they also made the entire process effortless and stress-free.”

Glauber Bandeira

Ryde

“Very happy with the service from Big Deal Exterior Cleaning. They cleaned our office exterior and the results were outstanding. Professional team, great communication and excellent attention to detail. Highly recommended.”

Kleber Lima

Parramatta

5.0 from 15+ Google reviews

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Often booked together

Other services you may need.

Gutter Cleaning

Full gutter and downpipe clear-out with a flow test, so Sydney storm water goes where it should.

Solar Panel Cleaning

Deionised-water solar panel cleaning that restores lost output without scratching the glass or voiding warranty.

House Washing & Soft Washing

A low-pressure soft wash for render, brick, cladding, eaves and fascias that removes mould at the root.

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