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What’s Included in Moss and Gutter Cleaning in Greater Victoria?

30/07/2026

If you are searching for gutter cleaning in Victoria, BC, there is a good chance the source of the problem is sitting on the roof above.

In Greater Victoria’s wet, mild climate, gutters rarely clog from leaves alone. Much of the debris that collects in local gutters is moss that has broken loose from the roof and washed downward during rain and windstorms.

Cleaning the gutters without addressing the moss may offer temporary relief, but the buildup often returns within a few months.

That is why roof moss removal and gutter cleaning work best as a combined service. Here is what a typical visit includes, why mossy roofs cause recurring drainage problems and how proactive maintenance can help protect your home.

Why Gutters Clog Faster on Mossy Roofs

Greater Victoria’s mild winters, frequent rainfall and shaded properties create ideal conditions for roof moss.

As moss grows, it forms thicker mats across the roof surface. Pieces gradually break away and wash into gutters and downspouts, carrying shingle grit, needles and other debris with them.

This buildup can lead to:

  • Gutters overflowing during heavy rainfall
  • Downspouts becoming blocked with compacted moss and grit
  • Water spilling over fascia boards and siding
  • Water collecting near foundations
  • Increased risk of drainage problems during cold weather

When gutters refill quickly after being cleaned, the moss growing on the roof is often the underlying cause.

What a Combined Moss and Gutter Cleaning Visit Includes

A combined visit addresses both the debris in the gutters and the source of that debris on the roof.

Hand removal of roof moss

Moss is carefully removed from the roof surface by hand rather than with a pressure washer.

Pressure washing can remove the protective granules from asphalt shingles and force water underneath roofing materials. Manual removal helps protect the roof while eliminating established moss growth.

Learn more about Thomson Roof’s moss-removal process.

Non-toxic roof treatment

After the visible moss is removed, the roof is treated to help inhibit regrowth.

Thomson Roof uses a non-toxic treatment that is safe for pets, gardens and landscaping when applied as directed. This is especially important because anything placed on the roof may eventually wash into gutters, downspouts and the surrounding yard.

Gutter and downspout clearing

Moss, shingle grit, leaves, needles and other debris are removed from the gutters so water can flow properly.

Downspouts are also cleared to reduce the risk of water backing up or spilling over the sides of the gutter system.

Roof debris removal

Roof valleys, areas behind chimneys and other places where needles and moss commonly collect are cleared during the visit.

Removing debris from these areas helps water move toward the gutters instead of pooling on the roof.

Because the moss is addressed at its source, the gutters are likely to stay clear longer than they would after a standalone cleaning.

Why Pressure Washing Is Not Recommended

Pressure washing may appear to be a fast way to remove moss, but it can damage asphalt shingles.

High-pressure water can strip away the granules that protect shingles from weather and ultraviolet exposure. It may also force water beneath the roofing material, increasing the risk of moisture-related damage.

Hand removal takes more care, but it protects the roofing material while addressing the moss directly.

Read more about the dangers of pressure washing a roof.

Pet-Safe and Garden-Safe Roof Treatment

What runs off your roof matters.

Rainwater carries roof treatments into gutters, downspouts, garden beds and other areas around the home. Homeowners with dogs, vegetable gardens, ornamental landscaping or rain barrels may be particularly concerned about what is being applied above them.

Thomson Roof uses a non-toxic treatment selected with pets, plants and surrounding landscaping in mind.

How Often Should Gutters Be Cleaned in Greater Victoria?

Most Greater Victoria homeowners should have their gutters inspected at least once a year.

Properties surrounded by mature trees may need more frequent attention, particularly after the fall and winter storm seasons. Homes with heavy roof moss may also experience recurring gutter blockages within a single rainy season.

Removing and treating the roof moss can help reduce how quickly the gutters refill.

Thomson Roof’s one- to two-year maintenance guarantee is designed to help keep moss regrowth under control and make future maintenance more predictable.

Moss and Gutter Cleaning Across Greater Victoria

Thomson Roof has treated roofs throughout Greater Victoria for more than 40 years and has served over 10,000 clients.

Service areas include:

  • Victoria
  • Langford
  • Colwood
  • Sidney
  • Sooke
  • The Westshore

Homes close to the coast, surrounded by mature trees or located in heavily shaded areas often experience the most significant moss growth.

Properties in Sooke and other forested parts of the Westshore may benefit especially from combining roof moss removal with gutter cleaning.

Learn more about roof moss removal and gutter cleaning in Sooke.

Frequently Asked Questions

Do you clean gutters without removing roof moss?

Thomson Roof’s focus is on addressing the source of recurring gutter buildup.

Cleaning gutters while leaving a moss-covered roof untreated may clear the immediate blockage, but new moss debris can begin collecting again during the next period of heavy rain.

A combined service provides a more complete solution by clearing the gutters and removing the material causing many of the blockages.

Is the roof treatment safe for pets and gardens?

Yes. Thomson Roof uses a non-toxic treatment that is safe for pets, gardens and landscaping when applied as directed.

This is important because rainwater carries roof runoff into gutters, downspouts and the surrounding yard.

How long does a moss and gutter cleaning visit take?

The amount of time required depends on factors such as:

  • Roof size
  • Roof pitch
  • Access conditions
  • The amount of moss present
  • The number and condition of the gutters and downspouts

Most residential visits can be completed within one day. The expected timeline will be explained when the quote is provided.

Why not pressure wash the roof and gutters?

Pressure washing can strip protective granules from asphalt shingles and force water beneath roofing materials.

Thomson Roof removes moss manually to protect the roof while clearing away the growth. Gutters and downspouts are then cleaned so water can drain properly.

Does roof moss really cause clogged gutters?

Yes. As roof moss grows and breaks apart, pieces wash into the gutter system along with grit, needles and other debris.

On moss-covered roofs, this material can cause gutters and downspouts to clog again soon after a basic cleaning.

Book Moss and Gutter Cleaning in Greater Victoria

A combined service can remove the moss from your roof, clear your gutters and help reduce recurring drainage problems.

Thomson Roof will assess the condition of your roof and gutter system, explain the recommended work and provide a straightforward quote.

Request a free moss and gutter cleaning quote.

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