Roof cleaning & soft-wash roof washing in Chilliwack and the Fraser Valley
Soft-wash roof washing that removes algae, black streaks, lichen and organic staining from the whole roof — low pressure, roof-safe, and never treated like a driveway.
What this service covers
- Roof-safe, low-pressure soft-wash treatment
- Removes moss, algae, lichen and organic buildup
- Helps slow moss regrowth at the root level
- Careful work around landscaping, fixtures and surrounding surfaces
Understanding roof cleaning
Black streaks, algae and lichen: what’s actually on your roof
The dark streaks running down from the ridge are usually algae staining — not dirt, and not a sign the roof is worn out. Shingle roofs hold moisture longer than almost any other exterior surface, and with the Fraser Valley’s long wet stretches, heavy tree cover and shaded north-facing slopes that barely see direct sun in winter, algae, lichen and moss all grow faster than most homeowners expect. Roof washing removes that organic growth across the whole roof surface. If thick moss is the main problem, our roof moss removal and demossing service is the more targeted fit.
Roofing we clean
Most of the roofs we wash are asphalt shingle, and we also clean metal roofing, along with rooflines, valleys and the attached gutters and downspouts. Every roof is assessed before treatment — the material, pitch, access and how heavy the buildup is all change how the job is approached. Not sure whether your roof is due? Here are 7 signs a Chilliwack roof needs cleaning.
Why we never pressure wash a roof
A pressure washer can strip the protective granules off asphalt shingles in seconds, which shortens the roof’s life and can void the manufacturer’s warranty outright. Instead, roof cleaning uses a soft-wash approach: a cleaning solution does the work of breaking down algae and moss at low pressure, so nothing is blasted off by force. We explain the difference in more detail in soft wash vs pressure washing for roofs.
What the treatment actually does
The solution is applied to affected areas and given time to work on the algae, lichen and moss rather than just stripping what’s visible on the surface. This is why soft-washed roofs tend to stay cleaner for longer than roofs that have just been scraped or blasted — the regrowth is slowed, not just the current buildup removed. Since debris often sheds into the eavestroughs during treatment, many homeowners pair this with gutter cleaning the same visit, and a full house wash if the siding shows similar buildup.
Helpful roof cleaning guides
- 7 Signs You Need Roof Cleaning in Chilliwack (Before Costly Repairs) — the early warning signs to watch for before buildup turns into repairs.
- Soft Wash vs Pressure Washing for Roofs — why roofs are soft washed and never pressure washed.
- Roof Cleaning vs Roof Replacement in Chilliwack & Hope | Save Your Roof — when cleaning is enough, and when a roofer should look first.
How we approach every roof cleaning job
- Assess roof material, access, pitch and buildup
- Work carefully around landscaping, gutters and surrounding surfaces
- Apply the appropriate roof-safe soft-wash treatment
- Rinse or finish only where correct for the system used
- Final detail check and property tidy-up
Signs your property may need roof cleaning
- Dark streaking running down from the ridge or vents
- Green or black patches spreading across shaded sections
- Moss visibly raised above the shingle line, especially on north-facing slopes
- Granules collecting in gutters after rain
Maintenance: Most Chilliwack roofs benefit from a full treatment every 1–3 years depending on tree cover and roof orientation — shaded, north-facing roofs on the shorter end of that range, sun-exposed roofs on the longer end.
A recent roof cleaning job
Common questions about roof cleaning
What causes black streaks on a roof?
Dark streaks on shingles are usually algae growing on the roof surface, which is common on shaded or damp roof sections in the Fraser Valley. A soft-wash roof cleaning removes the staining without the high pressure that can damage shingles.
Will pressure washing be used on my roof?
No. Roofs are cleaned with a soft-wash approach — low pressure combined with the correct cleaning solution — because high pressure can damage shingles and void manufacturer warranties.
Will the moss come back?
Moss can return over time due to shade and moisture in the Fraser Valley climate. A proper soft-wash treatment removes moss at the root and significantly slows regrowth compared to simply scraping it off.
Is roof cleaning safe for landscaping below?
We work carefully around landscaping, fixtures and surrounding surfaces, using the appropriate cleaning method for each area.
Related services
Ready to book roof cleaning?
Text a few photos for the fastest, most accurate quote.