How to Clean a Roof Yourself in Queensland: What's Safe, What's Not (2026)

If you have noticed moss growing on your tiles or your roof looking grimy, it is tempting to get up there and sort it out yourself. There is a lot of information online about DIY roof cleaning, and while some basic maintenance tasks are within reach for capable homeowners, roof work carries significant risks that are worth understanding before you grab the ladder.

Quick answer: Basic ground-level maintenance like clearing gutters is something most homeowners can manage safely. Getting on the roof to clean tiles or metal sheets is a different matter. Falls from roofs are a leading cause of serious injury in Australia, and in Queensland any significant roofing work requires a licensed contractor.

What You Can Safely Do Yourself

Gutter Clearing

Clearing leaf litter and debris from gutters is maintenance most homeowners can tackle from a stable ladder. This is worth doing regularly, particularly after Queensland's storm season, as blocked gutters cause water to back up under the roof edge and into the ceiling. Always use a proper ladder, never lean across and overextend, and have someone hold the ladder if possible.

Visual Inspection from the Ground

A pair of binoculars from the ground can tell you a lot about your roof's condition. Look for obviously cracked or missing tiles, dark patches of moss or lichen growth, sagging sections or debris sitting in valleys. If you notice any of these, it is worth booking a professional inspection.

Checking for Internal Signs of Roof Failure

Inside your roof cavity or ceiling, look for water stains, damp insulation or visible light coming through. These are clear signs of a roof issue that needs professional attention. Catching them early significantly reduces repair costs.

What You Should NOT Attempt Yourself

Walking on the Roof

This is where the serious risks begin. In Australia, falls from roofs are among the most common causes of workplace and home fatalities. A wet or mossy tile roof is particularly dangerous and can be as slippery as ice. If you are not a trained roofing professional with the right safety equipment, do not get on your roof.

High-Pressure Cleaning Tiles

This is a job that looks straightforward but carries real risks when done incorrectly. Pressure that is too high can blast the surface texture off tiles, drive water under laps on metal roofs and damage flashing around chimneys and vents. It also produces contaminated runoff containing moss, mould spores and chemical residue that needs to be managed properly. Professional restorers use calibrated equipment and appropriate technique for each roof type.

Applying Roof Coatings

Roof coatings are not the same as exterior house paint. They require proper surface preparation, the right primer for the substrate, correct application technique and adequate curing time between coats. An incorrectly applied coating peels within months and leaves the roof in a worse state than before. In Queensland, applying roof coatings is also covered by QBCC licensing requirements for work above a certain value.

Any Work Requiring More Than a Short Ladder

QBCC regulations in Queensland require a building licence for work valued over $11,000. More broadly, any work that requires scaffolding, working at height, or structural roof repairs should be carried out by a licensed contractor with appropriate insurance and fall protection systems.

What Happens When DIY Goes Wrong

In our experience working across Brisbane and the Gold Coast, we regularly see the aftermath of DIY roof cleaning and painting attempts:

• Tiles with surface texture blasted off by over-pressured cleaning, which permanently weakens the tiles

• Coatings applied over dirt or moss that had not been properly cleaned, causing them to peel within 12 to 18 months

• Mismatched pointing materials that crack and fall out within a season

• Homeowners who have injured themselves on the roof

The cost of fixing a failed DIY restoration is often higher than if the job had been done professionally in the first place.

What a Professional Restoration Includes That DIY Cannot Match

A professional full roof restoration from Roof Werx includes:

• Commercial-grade high-pressure cleaning at calibrated pressure for the specific roof type

• Full structural assessment and repair of tiles, ridge caps and pointing

• IRC-accredited 3-coat membrane system with up to 20-year warranty

• QBCC-licensed tradespeople with proper safety equipment

• Full insurance coverage for the duration of the job

• Written workmanship warranty, see our Warranty page for coverage details

Queensland Licensing Requirements for Roof Work

In Queensland, the QBCC (Queensland Building and Construction Commission) licenses contractors for building work. Any roofing work that forms part of a building, including painting, repairs and restoration, is subject to licensing requirements when the value exceeds $11,000. Always ask any roofing contractor you engage to provide their QBCC licence number and verify it at the QBCC website.

Roof Werx holds a current QBCC licence (15375921) and is an accredited applicator for IRC Industrial Roof Coatings. Learn more about our credentials on the About page.

When to Call a Professional

The short answer is before any work that requires getting on the roof. If your roof is showing any of the following, book a professional inspection:

• Visible moss, lichen or biological growth

• Cracked, broken or slipped tiles

• Faded or peeling coating

• Water stains on ceilings after rain

• Blocked valleys or gutters you cannot clear from the ground

• More than 10 to 15 years since the last restoration or inspection

Roof Werx offers free, no-obligation inspections across Brisbane and the Gold Coast. Book yours here.

Get a Quick Quote

Frequently Asked Questions

Can I use a garden hose to rinse my roof?

A gentle rinse with a standard garden hose is unlikely to cause damage. It will not remove established moss or lichen effectively, but it is a reasonable way to clear loose debris from gutters and valleys without getting on the roof.

Are roof cleaning chemicals available from hardware stores?

Yes. Various moss and lichen treatments are sold at hardware stores and can be applied from the ground via a garden sprayer on single-storey homes. They can slow regrowth but do not address the underlying causes of biological growth, and they do not restore the coating or repair structural issues.

What if I am comfortable working at heights?

Comfort and capability are different things. Even experienced tradespeople fall from roofs. Without proper fall protection equipment including a harness, anchor points and edge protection, working on a roof is genuinely dangerous regardless of your confidence level.

Is there anything I can do to maintain my roof between restorations?

Yes. Keep gutters clear, trim overhanging branches that deposit debris and shade the roof, which encourages moss growth, and book a visual inspection every 2 to 3 years. Catching issues early is always cheaper than waiting for problems to compound.