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Outdoor porcelain tiles and grout being deep cleaned beside a pool, black grout turning white

Outdoor Tile & Grout Cleaning

Outdoor porcelain tiles and grout being deep cleaned beside a pool, black grout turning white

Outdoor tile and grout cleaning Sydney: black algae killed in the grout where it lives, tiles cleaned at surface-safe pressure, and grout sealed so pool surrounds and patios stay clean.

Tiled outdoor areas have a weak point, and it isn’t the tile. Glazed porcelain and ceramic barely stain — but the grout between them is porous, absorbent and permanently damp in shade, which makes it perfect habitat for the black algae and mould that turn a smart tiled area grimy and slippery.

Why tiled areas go black — and slippery

The organism establishes in the grout joints first, then spreads a biofilm across the tile surface. That film is what makes tiles treacherous when wet. On a pool surround, a balcony or an entry stair, that’s not a cosmetic problem; it’s the most common slip hazard on an Eastern Suburbs property.

Pressure alone strips the visible film but leaves the organism rooted in the grout — which is why cheaply cleaned tiles look good for a season and are black again by winter. We treat the grout with a biocide, let it work, then clean at a pressure the tile finish can carry.

What we clean

Tiled patios and entertaining areas, pool surrounds and wet edges, balconies and terraces, entry paths and stairs, verandah tiles (including original tessellated tiles on period homes, which are cleaned with particular care — they’re irreplaceable), and commercial tiled forecourts.

Tile types and how they’re handled

Porcelain and glazed ceramic take moderate pressure comfortably. Terracotta is soft and porous — low pressure and the right chemistry, or the surface furs. Natural stone tiles (travertine, limestone, sandstone, slate) are treated as stone, not tile: chemistry first, gentle rinse, never blasted. Tessellated and encaustic tiles on Victorian and Federation verandahs are hand-and-low-pressure work only.

Sealing the grout

Once clean, grout can be sealed. Sealed grout stops drinking the moisture and organic matter that feed regrowth, resists staining, and keeps the whole area looking finished dramatically longer. On pool surrounds and shaded courtyards — the two areas that go black fastest — it’s the difference between an annual job and a once-in-several-years one.

Get a fixed written quote

Itemised by surface, priced before we start, and never finished until you've walked the property with us.

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FAQs

Questions, answered.

Everything homeowners usually ask before booking us in. Can't find your answer? Get in touch and we'll respond within 24 hours.

Ask Us Anything

Request a free quote and we'll respond within 24 hours with a fixed written quote — every surface and treatment itemised, with sealing priced separately so you can decide. No hourly rates, and no extras added on the day.

Yes — we're fully insured with $20m public liability cover.

Sandstone, render and aged concrete all need different treatment, so we match the method to the surface rather than blasting everything the same way. We identify what you have, test an inconspicuous area first, and tell you honestly what can and can't be restored.

We cover 106 Sydney suburbs across the Eastern Suburbs, North Shore and Northern Beaches — from the salt-hammered ocean strip to the canopy-shaded North Shore.

Growth is pre-treated so it's killed at the root rather than blasted off the top. Planting, lighting and pool areas are covered before we start, and runoff is controlled on sloped blocks.

We finish every job with a walkthrough — we walk the property with you and address anything you're not happy with on the spot. Nothing is signed off until you've seen every surface yourself, and you receive a photo report on every job.

Before & After

The difference, side by side.

Real Sydney properties — render, sandstone, tile, concrete and stone, cleaned and sealed the right way.

Before and after soft washing render and brick house facade in Sydney
Before After
Before and after soft washing algae stains from rendered wall and shutters
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Before and after cleaning and sealing terracotta courtyard tiles
Before After
Before and after cleaning and sealing sandstone garden steps
Before After
Before and after cleaning and sealing sandstone paving path
Before After
Before and after removing moss and leaves from a stone garden path
Before After
Before and after pressure washing a concrete driveway
Before After
Get In Touch

Need a quote for your property?

Fixed written quotes, surface-matched methods, and a photo report on every job. We respond within 24 hours.