Question 1

How much does roof cleaning cost in QLD?

Accepted Answer

Soft wash cleaning of a standard 3–4 bedroom home typically costs $450–$900. Larger homes, steeply pitched roofs, or roofs with heavy growth requiring chemical pre-treatment can cost $800–$1,500. Full roof restoration (clean, repoint, prime, coat) for a typical 3-bedroom home runs $3,500–$6,000. Very large or complex homes, or those requiring significant repointing work, can reach $7,000–$10,000.

Question 2

Does a roof cleaner need a licence in QLD?

Accepted Answer

For basic cleaning (no restoration work), no licence is required. Once the contract value, including labour and materials, exceeds $3,300, the contractor must hold a current QBCC licence. For any restoration work including repointing, rebedding, and applying protective coatings, a QBCC licence is almost always required because the total value exceeds this threshold. Always check the contractor's QBCC licence number at qbcc.qld.gov.au before signing any restoration contract.

Question 3

What is soft washing and is it better than pressure washing for roofs?

Accepted Answer

Soft washing uses low pressure (typically 100–300 PSI) combined with appropriate biodegradable chemical solutions to kill and remove biological growth. Pressure washing roofs, particularly concrete tiles, is widely discouraged because the high pressure removes the surface coating from tiles, strips pointing, and can force water under tiles into the roof structure. Professional roof cleaners should only use soft wash techniques on any tiled or coated roof.

Question 4

What's the difference between roof cleaning and roof restoration?

Accepted Answer

Cleaning removes biological growth and surface contamination from a structurally sound roof. Restoration is a comprehensive process that includes cleaning, repairing structural elements (repointing and rebedding cracked or loose ridge capping), priming the surface, and applying a weatherproof membrane coating that restores colour, fills surface porosity, and provides 10–15 years of UV and moisture protection. Restoration is appropriate when the roof shows structural deterioration beyond surface contamination.

Question 5

How long does a roof coating last in QLD?

Accepted Answer

Quality roof restoration coatings from reputable manufacturers (Dulux AcraTex, Wattyl, Nutech) typically carry a 10–15 year product warranty. Real-world performance depends on application quality, surface preparation, and the substrate. Queensland's UV is extremely harsh, coatings without UV-stable pigments can fade and chalk within 5–7 years. Always ask for the specific product being used and check its warranty conditions.

Question 6

My roof has green moss and black staining, do I need a full restoration?

Accepted Answer

Not necessarily. If the tiles are structurally intact, the pointing is sound, and the issue is purely biological growth, a soft wash clean is appropriate. A soft wash kills and removes the growth, and a residual biocide treatment can slow regrowth for 2–3 years. Full restoration is only warranted when the underlying structure is compromised, cracked or crumbling pointing, oxidised and porous tiles, or persistent moisture ingress.

Question 7

Does a restored roof increase my home's value?

Accepted Answer

Yes. An old, stained, or moss-covered roof is one of the first things a buyer notices and it creates an immediate impression of deferred maintenance. A newly cleaned or restored roof improves kerb appeal significantly and can affect buyer confidence in the whole property. Pre-sale cleaning or restoration is often recommended by real estate agents on older properties. For restoration specifically, a new coating can also lower your ongoing maintenance costs.

Question 8

Can I walk on my roof for inspection?

Accepted Answer

Walking on concrete tile roofs is generally safe if you step on the lower third of each tile (near the overlap). Terracotta tiles are more fragile and should only be walked on with battens or crawl boards. Metal roofs should be assessed carefully around areas with corrosion. However, roof access for a lay person without height-safety equipment is a real danger. Unless you're competent working at height, leave any roof inspection to professionals.

Question 9

My roof has cracked tiles, is that a problem?

Accepted Answer

Cracked tiles allow water ingress into the roof structure. Over time, this causes sarking deterioration, rafter rot, ceiling damage, and mould. Individual tile replacement is typically inexpensive ($50–$150 per tile replaced), but identifying cracked tiles requires a proper roof inspection. A roof cleaner doing a pre-quote inspection should identify visible cracked or slipped tiles. Leaks may not be traceable to a single crack without investigation.

Question 10

What should a full roof restoration quote include?

Accepted Answer

A complete quote should specify: the cleaning method, the repointing and rebedding scope (which ridge caps, how many), the primer product and number of coats, the finish coat product and warranty, the number of coats, colour options, and total contract value including all labour and materials. Get it in writing. For any quote over $3,300, confirm the contractor's QBCC licence number and verify it is current before signing.

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