Adelaide roof cleaning that removes moss and mould without cracking a single tile

No, that is the reason we use soft wash as the default method. High pressure is what damages tiles and can void Colorbond coating warranties, since it strips the factory paint and can crack or lift tile surfaces. Soft washing uses low pressure water paired with a roof-safe cleaning solution that breaks down moss, lichen and algae without blasting the surface underneath. We match the exact chemical dilution and dwell time to your roof type, whether it is terracotta tile, concrete tile, Colorbond, decramastic or cement, so the surface and any manufacturer coating stay intact.

Cost depends on roof size, pitch, access difficulty and how much growth needs removing, since a heavily moss-covered two-storey roof takes longer than a light clean on a single-storey home. We inspect the roof, either from the ground or with photos you send through, and provide a fixed-price quote before any work starts so there are no surprise costs once we are on the roof. Bundling roof cleaning with gutter clearing or house washing on the same visit is usually more cost effective than booking each service separately.

Most Adelaide homes need a full roof clean every two to three years, though shaded properties near trees, the coast or the Adelaide Hills with heavy tree cover often need it closer to every eighteen months to two years. Properties on open, sunny blocks with little tree cover can sometimes stretch to three or four years between cleans. A biocide top-up treatment between full cleans can extend that interval further by slowing new moss and algae growth.

In most cases yes, soft washing removes lichen and black algae streaking effectively, restoring the roof's original colour. On very old, porous tile where lichen has been established for many years, some faint shadowing can remain because the growth has etched into the tile surface itself rather than just sitting on top of it. We assess this during the pre-clean inspection and let you know honestly what result to expect for your specific roof before quoting, rather than promising a result the roof's condition cannot deliver.

We inspect for cracked, brittle or already-broken tiles before starting any clean, since walking on a damaged roof or applying the wrong pressure can make existing problems worse. Soft washing itself is low impact because it relies on chemical action rather than force, which makes it the safer choice for older cement and terracotta roofs. Where we find tiles too fragile or damaged to safely walk near, we flag this before starting and adjust our access plan, or recommend repair first if the roof genuinely needs it.

We protect gutter outlets during the wash to limit debris going down the downpipes, and we flush gutters after the roof clean to clear moss, lichen and grit that has washed down during the process. This step prevents the common problem of a freshly cleaned roof causing a gutter blockage within weeks because debris was left to settle and compact. If your gutters need a full internal clean and inspection rather than just a post-clean flush, we can quote that as an add-on to the roof cleaning job.