Roof Cleaning &
Treatment in Halifax HRM

Low-pressure roof soft washing for homes across Halifax,
Dartmouth, Bedford, and surrounding HRM communities.

Yellow Wash uses a professional soft wash cleaning method with a low-pressure algicide treatment to safely treat organic buildup, mildew, moss, bacteria, algae, bird droppings, and stains your roof has collected over the years.

Roof cleaning and treatment in Halifax HRM
Low-Pressure Roof Cleaning
Safe for Asphalt Shingles
Targets Organic Growth
Clear Treatment Expectations

Common Roof Growth
We Safely Treat

Those dark streaks and rough patches are not just dirt. They are living organisms that can affect the appearance of your roof and contribute to long-term wear if left untreated.

Clean Roof. Healthier-Looking Home.

A clean roof improves curb appeal, helps protect your shingles, and gives your home a cleaner, better-maintained appearance.

Algae Gloeocapsa magma on asphalt shingles

1. Algae
Gloeocapsa magma

What it looks like

Dark black, blue-green streaks and stains that often look like dirt.

Impact

Algae is mostly a cosmetic issue at first, but it can feed on the limestone filler in asphalt shingles and contribute to granule loss over time.

Where it grows

Most common on north-facing roof slopes and shaded areas that stay damp longer.

Moss growth on roof shingles

2. Moss

What it looks like

Thick, green, fuzzy or spongy clumps growing along shingle edges and valleys.

Impact

Moss can lift shingle edges and trap moisture, increasing the risk of water intrusion, wood rot, and roof deterioration.

Where it grows

Cool, shaded, and consistently damp roof areas with limited airflow.

Lichen on roof shingles

3. Lichen

What it looks like

Flat, crusty patches that may appear yellow, light green, pale green, or white.

Impact

Lichen bonds tightly to roofing material and can be difficult to remove. If left untreated, it may weaken the surface and leave lasting marks.

Where it grows

Often found on ridge caps and roof areas with moderate to strong sun exposure.

Mold and mildew on roof shingles

4. Mold & Mildew

What it looks like

Slimy, fuzzy, or discolored spots, often appearing black, brown, or dark green.

Impact

Mold and mildew often develop where organic debris collects and moisture stays trapped, making the roof look aged and poorly maintained.

Where it grows

Areas with heavy moisture, poor airflow, shade, and accumulated roof debris.

Why Roof Soft Washing Works

Low-Pressure Application

We use low pressure to safely apply the roof treatment without relying on damaging pressure.

Targets Growth at the Source

The treatment is designed to target algae, moss, lichen, mold, mildew, and organic buildup.

Safer Than Aggressive Pressure Washing

Soft washing helps protect asphalt shingles, granules, and roofing materials.

Improves Curb Appeal

A cleaner roof can dramatically improve the overall look of your home.

Roof Cleaning Service Areas

Proudly serving Halifax, Dartmouth, Bedford, Sackville, Fall River, Cole Harbour, and surrounding HRM.

Frequently Asked Questions

Is roof cleaning safe for shingles?
Yes. Our roof cleaning method uses low-pressure application and a roof-safe algicide treatment. We do not rely on aggressive pressure washing that can damage shingles.
What should I expect after roof treatment?
Roof treatment does not produce an immediate result. Treated moss turns white, then dries, crumbles and gradually falls away from the roof. The appearance continues to change over time after treatment.
What affects the price of roof treatment?
Pricing depends on the roof height, accessibility, type of organic growth and travel distance. Request a custom quote with your property address and photos so we can assess the work.
Do you use high pressure on roofs?
No. Roofs should not be cleaned with aggressive pressure. We use a low-pressure soft wash treatment method to protect the roof surface.
How often should I treat my roof?
Most roofs benefit from treatment every few years, depending on shade, tree coverage, roof slope, moisture, and the amount of algae, moss, or organic buildup present.

Ready to Restore Your Roof?

Get a free quote for professional low-pressure roof cleaning and treatment that is safe, effective, and built to last.