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PROFESSIONAL
ROOF WASHING

THAT PROTECTS YOUR INVESTMENT

Safely remove moss, algoe, black streaks, lichen, dirt, and organic
buildup with professional roof cleaning designed for all roof types.

ROOF SAFE CLEANING

PROTECT YOUR INVESTMENT

EXTEND ROOF LIFESPAN

What’s Growing
On Your Roof?

Those black streaks and green patches aren’t just dirt. They’re living organisms that can damage your roof over time.

Gloeocapsa Magma

The bacteria that causes black streaks on asphalt shingles.

Gloeocapsa magma on roof shingles

Algae

Feeds on limestone filler in shingles, causing discoloration and staining.

Algae growth on roof shingles

Moss

Retains moisture and can lift and separate shingles.

Moss growing on roof shingles

Lichen

A combination of algae and fungus that can deteriorate roofing materials.

Lichen on roofing material

Trapped Moisture

Leads to rot, leaks, and reduces your roof’s lifespan.

Trapped moisture under roof shingles

Regular roof cleaning protects your home and prevents costly repairs.

Our Roof Washing
Services Include

Moss & Algae
Removal

Black Streak
Removal

Lichen
Treatment

Roof
Inspection

Soft Wash
Cleaning

Gutter Rinse
& Flush

Debris
Removal

Preventative
Treatment

Everything needed to make your roof look clean, fresh, and last longer.

WHY SOFT WASHING
MATTERS

Pressure washing roof
×
THE WRONG WAY PRESSURE WASHING
  • Strips away shingle granules
  • Can lift and loosen shingles
  • Forces water under shingles
  • Causes premature aging
  • May void roof warranties
Soft washing roof
✓
THE RIGHT WAY SOFT WASHING
  • Low pressure — roof safe
  • Kills algae, moss & bacteria
  • No damage to shingles
  • Deep cleans at the source
  • Extends roof lifespan

MOSS CAN CAUSE
SERIOUS DAMAGE

Moss holds moisture like a sponge. Over time, it can separate shingles, pry up edges, and create the perfect environment for rot, leaks, and costly damage.

Moss on roof shingles
  • Roots can lift and separate shingles
  • Traps moisture causing wood rot
  • Freeze/thaw cycles cause cracking
  • Blocks water from draining properly
  • Accelerates roof deterioration

OUR ROOF CLEANING
PROCESS

1

INSPECTION

We inspect your roof and assess the type of roof and level of buildup.

2

TREATMENT APPLICATION

We apply a professional cleaning solution that targets algae, moss, lichen and bacteria.

3

DWELL TIME

The solution penetrates and kills organic growth at the root.

4

SOFT WASH CLEANING

Low-pressure rinse removes all dead organic matter safely.

5

FINAL INSPECTION

We do a final walkthrough to ensure your roof is clean and your property is spotless.

WE CLEAN ALL
ROOF TYPES

Asphalt Shingles
ASPHALT
SHINGLES
Cedar Shake
CEDAR
SHAKE
Metal Roofs
METAL
ROOFS
Tile Roofs
TILE
ROOFS
Synthetic Composite Roof
SYNTHETIC /
COMPOSITE
Flat Roofs
FLAT ROOFS
(LOW-SLOPE)
✓

No matter the material, we use the
right method for a safe, thorough clean.

Signs Your Roof
Needs Cleaning

Black Streaks or Discoloration

Moss Growth on Shingles

Green or Dark Staining

Lichen Spots or Patches

Debris in Valleys or Edges

Dull, Aged Appearance

Why Choose
Wash Dudes?

Professional roof cleaning with safe methods, reliable service, and results homeowners can trust.

★★★★★

Hundreds of happy homeowners
across Ottawa!

Roof Cleaning Experts

Trained professionals with the right equipment and safe techniques.

Roof-Safe Soft Washing

We use low pressure and proven solutions that won’t damage your roof.

Fully Insured

Your home is protected with full liability insurance.

Local Ottawa Company

Proudly serving our community with honest, reliable service.

Satisfaction Guaranteed

We stand behind our work and your happiness is our priority.

Real Results. Real People.

5-Star Reviews From Your Neighbours

Don’t just take our word for it — hear from homeowners across Ottawa who trust us to keep their homes clean, bright and beautiful.

Google Reviews

293+ 5-Star Reviews

Posted on Google Google
Grace Yang profile picture
Grace Yang
Google star 1Google star 2Google star 3Google star 4Google star 5Trustindex verifies that the original source of the review is Google.
Very professional and efficient, very happy with their cleaning work
Posted on Google Google
T Rosales profile picture
T Rosales
Google star 1Google star 2Google star 3Google star 4Google star 5Trustindex verifies that the original source of the review is Google.
Job was well done. Service was excellent.
Posted on Google Google
Mike Umbach profile picture
Mike Umbach
Google star 1Google star 2Google star 3Google star 4Google star 5Trustindex verifies that the original source of the review is Google.
Wash Dudes were professional right from the initial call and did a fantastic job cleaning our house. Highly recommended.
Posted on Google Google
Madeleine Beaulac profile picture
Madeleine Beaulac
Google star 1Google star 2Google star 3Google star 4Google star 5Trustindex verifies that the original source of the review is Google.
Professionnal work! I highly recommend it to anyone!
Posted on Google Google
Jeremy Geurts profile picture
Jeremy Geurts
Google star 1Google star 2Google star 3Google star 4Google star 5Trustindex verifies that the original source of the review is Google.
Sami and Tristan were great, good price, great service and quick communication and reliability. Will be using them again for sure.
Posted on Google Google
Kerry Robinson profile picture
Kerry Robinson
Google star 1Google star 2Google star 3Google star 4Google star 5Trustindex verifies that the original source of the review is Google.
Excellent company. Great communication. They keep you informed. Sami explains everything .. about the process and the products they use . Sami and Tristan came this morning. And worked hard. They did a super job !!! My house looks soooo good . I would definitely recommend Wash Dudes. K
Posted on Google Google
Tammy Levesque profile picture
Tammy Levesque
Google star 1Google star 2Google star 3Google star 4Google star 5Trustindex verifies that the original source of the review is Google.
Great to work with! Professional, polite and windows are clean.
Posted on Google Google
Marc Renault profile picture
Marc Renault
Google star 1Google star 2Google star 3Google star 4Google star 5Trustindex verifies that the original source of the review is Google.
Great outfit. Showed up when they said they would, got right to work and made a 40 year old house look like brand new!!! Hat off to the Wash Dudes...great guys and they do an excellent job!!!
Posted on Google Google
Samatar Daher profile picture
Samatar Daher
Google star 1Google star 2Google star 3Google star 4Google star 5Trustindex verifies that the original source of the review is Google.
Really happy with the service from Wash Dudes. They did a great job cleaning the exterior of my house and the difference is noticeable. The whole process was smooth, and they were friendly, professional, and took their time to make sure everything was done properly. Great service and great results. I’d definitely recommend them to anyone looking to have their home exterior cleaned.

Frequently Asked
Questions

Is roof washing safe for my roof?

Yes, when done correctly. We use a professional soft washing process, not high-pressure washing, for delicate roofing materials like asphalt shingles, cedar shake, and other sensitive roof systems. High pressure can strip protective granules, force water beneath shingles, and shorten the life of your roof. Our low-pressure roof cleaning method safely removes algae, moss, lichen, dirt, and organic buildup without causing damage.

How often should I have my roof cleaned?

Most roofs benefit from professional cleaning every 2–5 years, depending on the roofing material, surrounding trees, moisture exposure, and the amount of organic growth present. Homes with heavy shade, moss buildup, or visible black streaking may require more frequent maintenance to prevent deterioration and extend roof lifespan.

What are those black streaks on my roof?

Those black streaks are often caused by Gloeocapsa Magma, a type of airborne bacteria that feeds on the limestone filler found in many asphalt shingles. Over time, it creates dark staining, reduces curb appeal, and contributes to roof deterioration if left untreated. Professional roof soft washing safely eliminates this growth at the source.

Can moss damage my roof?

Yes. Moss can be extremely damaging to roofing systems if left untreated. It traps moisture against the roof surface, can lift and separate shingles, encourages rot, and increases the risk of leaks and freeze/thaw damage. Professional moss removal helps protect your roof and prevent costly repairs.

Will roof cleaning damage my shingles?

Not with the proper cleaning method. We use roof-safe soft washing techniques specifically designed to clean without damaging shingles or other roofing materials. Unlike aggressive pressure washing, our approach removes contaminants safely while preserving the integrity of your roof.

Do you pressure wash roofs?

No, not delicate roofing systems like asphalt shingles. Pressure washing can cause significant damage, including granule loss, lifted shingles, water intrusion, and premature roof aging. We use low-pressure soft washing methods tailored to each roof type for safe, effective cleaning.

What types of roofs do you clean?

We professionally clean a wide range of roofing materials, including:

  • Asphalt shingle roofs
  • Cedar shake roofs
  • Metal roofs
  • Tile roofs
  • Composite / synthetic roofing
  • Flat and low-slope roofing systems

Each roof type is assessed individually to ensure the safest and most effective cleaning method is used.

How long does roof cleaning last?

Results vary depending on environmental conditions, surrounding tree coverage, moisture exposure, and roof material, but professional roof cleaning typically lasts 2–5 years. Preventative treatments and routine maintenance can help extend results even longer.

Do I need to be home for the service?

No. As long as we have safe access to the property, you do not need to be home for exterior roof cleaning services. Our team will complete the work professionally, and we’ll provide updates and electronic invoicing once the job is complete.

Do you offer preventative roof treatments?

Yes. Preventative treatments can help slow the return of moss, algae, lichen, and organic growth, keeping your roof cleaner for longer and helping protect your investment.

Have more questions? We’re here to help!

Working With Wash Dudes
Is Fast & Easy

1

Request A No Pressure Quote

Get your free, no-obligation quote.

2

Schedule Your Service

Pick a time that’s convenient for you.

3

We Clean Everything

We clean safely and thoroughly.

4

Enjoy A Clean Roof

Protect your home and enjoy peace of mind.

Recent Roof Washing Photos

READY FOR SERVICE?

CLICK OR CALL TODAY FOR A FREE, NO-OBLIGATION QUOTE. WE’LL GET YOU ON THE SCHEDULE IMMEDIATELY WITH NO HASSLE.

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