Moss Prevention

Our Approach

3 Pillars of Service:

1: Inspect & Document

The first step in our moss prevention process is to thoroughly document the condition of your roof. During our initial inspection or treatment, we create a detailed roof health record that includes photographs, observations, and key information about the roof’s current condition. We document areas of existing moss or algae growth, shingle condition, drainage and debris, flashing, penetrations, and other factors that may affect the roof’s long-term performance. This initial record establishes a baseline that allows us to monitor changes over time, identify potential concerns early, and provide a clear history of the care and maintenance performed on your roof.

2: Prevent

Once we understand the roof’s condition, we select an appropriate treatment to help control moss, algae, and organic growth while protecting the roofing materials. Whenever practical, we prioritize more environmentally conscious solutions, such as sodium percarbonate-based products, while selecting the treatment best suited to the roof’s specific condition. Our goal is not simply to remove existing growth, but to help prevent its return and support the long-term health of the roof.

3) Monitor

Our service doesn’t end when the initial treatment is complete. We schedule a follow-up inspection approximately 6–12 months after the work is performed to assess the roof’s condition, monitor for returning moss or organic growth, and determine whether any additional maintenance is recommended. This ongoing monitoring helps keep your roof on track for long-term health and protection.

More Than Just a Moss Removal Service

removing moss helps a roof shed water and dry as intended. Algae growth can cause discoloration and darkening of light-coloured shingles, which may increase their exposure to UV radiation and contribute to premature surface deterioration. We help reduce conditions that can contribute to premature roof deterioration.

Why Do We Focus on Prevention?

Your roof might not be something you think about, until you have an problem on your hands. By the time you actually notice, moss has probably been growing on your roof for years. At that point, manual removal is necessary, which inevitably leads to loss of UV protective granular material.

With scheduled Maintenance that helps keep your roof cleaner, we can help you brighten the appearance of your home & get the most of your roof.

With Yearly or bi-yearly roof treatments, we are able to nearly eliminate 4 of these factors!

6 contributors to early roof replacement:

Moss growth
Moisture
Granule loss
Debris accumulation
Poor attic ventilation
Overhanging trees and shade

Regular treatments may help your roof reach its expected service life by

1. Moss can lift the edges of shingles

As moss becomes thicker, it grows underneath the lower edges of shingles.

This can:

Slightly lift the shingle edge.
Allow wind-driven rain to penetrate more easily.
Increase the chance that wind catches and damages shingles.

This is especially a concern on older roofs where the shingles have already become less flexible.

2. Reducing Moisture exposure (probably the most important reason

Moss acts like a sponge, absorbing rainwater and holding moisture against the shingles long after the rest of the roof has dried. Asphalt shingles are designed to shed water and dry relatively quickly.

Prolonged moisture can:

Keep shingles damp for much longer after rain.
Increase the amount of time the roofing materials are exposed to moisture.
Slow the drying of the roof deck underneath.

Over many years, repeated wetting and slow drying can contribute to premature aging of roofing materials.

3. Reducing Freeze-Thaw Stress

In climates with freezing temperatures, moss holds water that can freeze.

As water freezes it expands, which can:

Increase mechanical stress on shingles.
Widen tiny cracks over repeated freeze-thaw cycles.
Contribute to deterioration over many winters.

This effect is most significant in regions that experience frequent freezing.

4. Roots (rhizoids) can cling tightly to a shingles granular UV protective material

Moss doesn't have true roots, but it has structures called rhizoids that anchor it to the surface.

They generally do not penetrate deeply through asphalt shingles like plant roots into soil. However, they can grip the rough mineral granules very tightly.