Roof Cleaning Perth, without the blasting.

Soft washing cleans with a treatment rather than with force. We spray it on at low pressure, from ladders at the eaves, and it kills the growth where it grips. High-pressure cleaning tries to blast the growth off the surface with water force alone. The solution does the work, not the pressure, which is why soft washing is gentler on the roof. There is no same-day rinse-clean, the dead growth weathers off with the rain over the months that follow.

It can. High-pressure blasting chips and cracks tiles, strips the tile's weathered protective surface, and can blow out ridge bedding and pointing. It also forces water up under the tile laps and flashings, which is how a clean can turn into a leak. That is the case against blasting and the reason we soft wash instead.

Only at the lowest pressure, effectively a soft wash. High pressure scratches the factory paint film on Colorbond, metal and zincalume, and once the coating is scratched it can start to oxidise and chalk. We treat the algae and grime with a low-pressure application so the factory finish stays intact, and the growth weathers off over the following months rather than being blasted away.

Not the way we clean. Soft washing uses low pressure and a treatment, so it does not hammer the tiles, blow out the pointing along the ridges, or drive water under the laps. The damage people worry about comes from high-pressure blasting, which is exactly the method we avoid.

Soft washing is the method most roof and tile manufacturers recommend, so cleaning this way is unlikely to be an issue. High-pressure blasting is the risk: chipping tiles, stripping surfaces and forcing water under flashings is the kind of damage that can affect a tile warranty or complicate an insurance claim. We clean the way manufacturers ask you to.

A soft wash keeps a Perth roof clearer for longer than blasting, roughly 1 to 3 years. The treatment stays active on the tiles for up to 24 months and reactivates every time the roof re-wets, so it keeps killing regrowth rather than just stripping the top off once. How long depends on shade, tree cover and how exposed the roof is. Nothing keeps a Perth roof green-free forever, but we slow the return and make the next treatment easier, and we can put you on scheduled upkeep.

For most Perth roofs, every 1 to 3 years. Sooner if the roof is shaded, sits under trees or faces south, where moss, lichen and black algae take hold fastest. A roof in full sun with no tree cover can go longer between cleans.

We kill it at the root. Soft washing applies a biocidal treatment that kills the moss and lichen where it grips, and the dead growth then weathers off with the rain over the following months. That is different from blasting, which only strips the top layer and leaves roots and spores behind to regrow faster. Killing it at the root is why a soft wash stays clearer for longer.

Not the same day, and that is the honest answer. A roof soft wash is a treatment, not a same-day strip. The biocidal wash kills the growth, then the dead moss and lichen weather and wash off naturally with the rain, so the roof clears progressively over roughly 3 to 12 months. Heavier growth takes longer to fall away. We do not climb up and blast it clean, because that is what damages tiles and pointing. What you are paying for is the growth being killed at the root and kept from racing back, not a quick strip that greens over again within the year.

We work from ladders at the eaves and do not climb across the roof, so tell us if panels are up there when you book. We keep the low-pressure treatment controlled around the panels and their fittings, and we never blast anything. If the panels themselves need cleaning, tell us and we will let you know what we can reach and quote it in.

We work from ladders at the eaves, so we clear the gutters and downpipes we can reach from the ladder. We do not walk the roof checking valleys and flashings. As the treated growth dies and weathers off over the following months it washes down into the gutters, so if you want the gutters cleared as part of the job, tell us the scope you want and we quote it in.

Roof cleaning is quoted per job, because roofs vary too much for a flat rate. The price depends on the roof size, the pitch, the height and access, and how much growth or staining there is. We measure your roof and confirm a fixed price before you book, so there are no surprises on the day, and the quote is free.

Yes. Black streaks and stains are usually algae, worst on the shaded southern face. The treatment kills the algae rather than blasting it off, and the dead growth weathers off over the following months, so the streaking clears and stays clearer for longer. Very old, deeply set staining does not always clear completely, and we will tell you honestly what we can shift before we start.

Bore water iron staining is a real Perth problem. Perth bore and reticulation water carries iron, and where sprinklers throw onto the roof that iron oxidises into orange and brown staining, the same stain you see on limestone walls and paving. We will be straight with you though. Our roof soft wash is a biocidal treatment that kills living growth like moss, lichen and algae. Iron staining is not living growth, so a soft wash will not lift it, and we do not blast or acid-wash a roof to chase it, because that is exactly the kind of pressure and chemistry that damages tiles and pointing. If iron staining is your main concern, tell us and we will give you an honest view of what can and cannot be done.

Yes, and it matters a lot. Terracotta is the most fragile roof to clean. On glazed terracotta, high pressure strips the glaze; on unglazed terracotta, it etches the surface. Either way terracotta is treated with a low-pressure biocidal wash and left to work, never blasting. That is the whole reason we soft wash.

We clean roofs right across the Perth metro and into the South West, from Joondalup, Wanneroo, Butler and Ellenbrook in the north, through Fremantle, Canning Vale and Kalamunda, down to Rockingham, Baldivis and Mandurah. If you are in or around Perth, send your suburb and we will confirm.

Yes. We clean residential roofs, and commercial and strata roofs. The method is the same, soft wash to protect the roof and the surfaces below, and larger sites are quoted per job on size, access and scope.

It is the best way to keep it clearer for longer. Once the roof is clean and prepped, we can protect it with a breathable, colourless mineral coating that helps the tile shed water, so moss and lichen find it harder to grip. Unlike an acrylic roof repaint, it does not trap moisture in the tile. The protect step is our sealing service and is registered under a 10-year guarantee. See our roof tile sealing page for how it works.

The treatment kills the growth and it weathers off, taking most of the staining with it, but where lichen has sat on a tile for years it can etch the surface, and that mark can stay after the growth is gone. Old, faded tiles will not come up factory-new either, because a clean is not a repaint. We will tell you honestly what a clean will and will not shift before we start.

Yes, for most Perth roofs. Left alone, moss and lichen hold moisture against the tiles, block gutters and spread across the roof. Clearing it protects the roof surface, keeps the gutters flowing and lifts the look of the whole house. Cleaning it and then protecting it is better value again, because it stays clearer for longer.

Yes. Every roof clean is quoted with no obligation. We measure the roof, confirm a fixed price before you book, and there is nothing to pay to get the quote. Send your suburb and a few photos to start.