Ottawa & surrounding area · Roof washing & moss treatment

A fresher-looking roof.
Care beyond the curb.

Moss or dark algae streaks? We use a low-pressure hypochlorite and surfactant treatment to remove algae and moss from suitable roofs.

End-of-year sale · Save $100

Residential roof washing From $449

Request your quote by November 30, 2026. Work scheduled when weather and roof conditions allow.

Suitable site water required. Scope and price confirmed before booking.

AI illustration of a Curbwell worker applying a low-pressure treatment to a shingle roof
Roof suitability checked firstProperty protection plannedBefore-and-after work photos

Care starts with a closer look

Treat the roof you have.

Tree cover and shaded roof areas can make moss and staining more noticeable. We look at the material, visible condition and affected areas before recommending a cleaning approach.

Moss & visible growth

Show us where growth is concentrated, including shaded slopes and areas below overhanging trees.

Dark streaks & staining

Photos help us understand the concern. Treatment is selected after reviewing the roof, rather than assuming every mark has the same cause.

The whole property

Outdoor taps, gardens, nearby surfaces and drainage are part of planning the work, not an afterthought.

Choose your roof care

Clear options. An agreed scope.

Cleaning suited to your roof

Roof washing & moss treatment

From $449End-of-year sale

Low-pressure hypochlorite and surfactant treatment targets algae and moss. The surfactant helps the solution wet and cling to the roof surface.

  • Review material, condition and access
  • Agree roof-edge and flashing cleaning
  • Check gutters and drainage
  • Before-and-after work photos
Request roof washing →

Optional ongoing prevention

Zinc-strip installation

Quoted separately

An option to assess for suitable roofs with recurring moss concerns, after existing growth has been addressed.

  • Roof and manufacturer compatibility reviewed
  • Installation method agreed before proceeding
  • Coverage depends on roof layout and rainwater flow
  • Existing moss treatment and other work scoped separately
Discuss zinc strips →

How your visit comes together

A plan before treatment begins.

  1. 01

    Share the details

    Send roof photos from a safe position, the address and the areas that concern you. Tell us about access and water supply.

  2. 02

    Confirm the approach

    We review roof suitability, the proposed treatment, protection needs and expected appearance before quoting.

  3. 03

    Prepare & treat

    Agree the scope and timing, then prepare the property and carry out suitable cleaning and treatment.

  4. 04

    Review the work

    See before-and-after work photos and discuss remaining concerns or any separately recommended follow-up.

Thoughtful property care

Your roof.
Your garden. Your home.

Before booking, tell us about outdoor taps, gardens, ponds, nearby surfaces and any access limitations. These details help us plan the protection and work area.

We plan protection for landscaping and nearby surfaces, along with runoff handling. The cleaning method must suit the roofing material and manufacturer guidance; asphalt shingles are not high-pressure washed.

Water supply: A working outdoor tap with adequate supply is required. Wells and water restrictions need to be discussed in advance.

Before you book

Roof-washing questions, answered.

What determines the price?

Residential roof washing From $449 CAD. Size, pitch, height, access, buildup and the protection required determine the final quote.

What do you use to treat algae and moss?

We apply hypochlorite with a compatible surfactant at low pressure on suitable roofs. This treats algae and moss while helping the solution stay in contact with the surface. We use your outdoor water supply and plan protection for surrounding plants and surfaces.

Do you need our water supply?

Yes. A working outdoor tap and suitable water supply are required. Tell us about wells, water-use restrictions and tap access before booking so we can confirm suitability.

Will the roof look completely clear immediately?

We discuss the expected appearance and treatment timeline for your roof before work. Results depend on the type and extent of growth and the condition of the roofing; we do not promise an instant, like-new finish.

Is gutter cleaning included?

Full gutter cleaning is a separate service. You can select both services in the same quote request so we can agree a combined scope.

Can zinc strips be added?

Zinc strips are a separately quoted option for suitable roofs after existing moss has been addressed. We review roof condition, compatibility and installation before recommending them.

Can this be part of ongoing care?

You can discuss roof washing as part of an ongoing home-care plan. Visits, scope and any payment schedule need a separate agreement; requesting a quote does not start a subscription.

Give the whole exterior a fresh start.

Combine roof washing, siding soft washing, gutter cleaning and exterior window cleaning in our full exterior house clean. We quote the complete scope for your property.

Before you choose

Which cleaning method fits your home?

Read our soft washing vs. pressure washing guide to understand the methods and plan your exterior clean.

Let’s look at your roof

Give your roof a little more care.

Select roof washing, add any other services and upload photos with your enquiry. We review the request before confirming scope, price and timing.

Build my quote request →

Have we cared for your home?

We’d appreciate your honest feedback.

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