Roof moss removal · Greater Victoria
Get the moss off your Victoria roof, and keep it off.
Hand removal, a roofer’s inspection while we’re up there, and a treatment that keeps runoff out of the storm drains.
Now booking. Tell us about your roof and we’ll email you a time.
Victoria, Saanich, Oak Bay, Esquimalt, Langford, Colwood, Sooke and Sidney.
Where it shows up in Greater Victoria
Greater Victoria is the driest place on this coast, at roughly 705 mm of rain a year, and it still grows moss on roofs. That surprises people. Moss depends on shade far more than on total rainfall, and a north slope under a Garry oak does not dry out just because the city is sunny.
The pattern here is patchier than up-island. A roof in an open Langford subdivision can stay clear for years while a house four streets away in Saanich under mature canopy is carpeted on one plane.
Older neighbourhoods with big trees — Oak Bay, Fairfield, parts of Saanich — are where we see it most, and it is almost always the shaded slope rather than the whole roof.
How we do it
Manual first, then treatment, with the runoff managed throughout.
01
Manual removal
The bulk comes off by hand and with soft tools, working down the slope rather than up under the courses.
02
Treatment
Applied to what remains so regrowth is slower. We will tell you what we are using and what weather it needs.
03
Runoff controlled
Downpipes managed so runoff is not going straight into a storm drain, and treatment kept away from drains, ponds and planting.
How we protect the roof while we do it
Moss comes off by hand and with soft tools, never by pressure washing a shingle roof. Pressure stripping takes the granules with it and drives water up under the courses, which costs you years of roof to gain one tidy season.
Treatment then slows the regrowth. On a shaded, wet slope moss does come back, so the useful measure is how long the reset lasts — and that depends on your trees and your exposure.
Cut the branches, change the problem
The thing that actually changes a mossy slope is light and airflow. Where branches sit over the roof, cutting them back does more than any treatment will.
If the roof is old and the moss has been holding water against it for years, cleaning it may be money spent on something near the end of its life. We will tell you if that is what we find.
Victoria moss questions.
Tell us about your project and we’ll email you to book.
Send the address, which slopes have the moss and roughly how old the roof is.