Roof cleaning in North Highlands is mostly about dust and debris rather than the moss common under heavy tree shade elsewhere in the metro — with less mature canopy here, roofs get more direct sun and less of the damp, shaded conditions that grow moss.
We rarely wash a roof, because washing is what damages it. Pressure strips the protective granules off shingles, and on soft roofing the damage is worse and not repairable by cleaning it again later. Driveways, patios and siding are a different story — those we do clean under pressure. So a roof gets two different treatments depending on what is growing on it. Heavy moss — the thick raised growth that has built up in the shade — comes off mechanically, with a brush. The flat lichen patches are a different problem: they hold on at the root, and scrubbing them just removes what you can see. For those the whole roof is sprayed with a treatment that kills the growth at the root, and over the next two or three weeks the lichen dies and blows off in the wind. That is why this service has a second visit built into it rather than ending when the crew packs up: we come back in two to three weeks to look at the result. What it costs depends on the size of the house, the pitch of the roof — which matters a great deal — the height of the building, and how close your neighbours are. When houses sit close together, some of what comes off the roof lands on the neighbour's property, and we clean that up too. A roof visit starts at $400.
Roofs here are checked mainly for dust and debris buildup rather than moss, given the more open, sunnier conditions typical of the area's flatter streets.
Neighborhoods we cover: McClellan Park