The Roof Is Not a Hard Surface

Unlike patios or driveways, a roof is a layered system designed to shed water — not withstand it being forced underneath.

Tiles, membranes, underlay and fixings all work together to protect the structure of the property.
Introducing high-pressure water can compromise that system in ways that are not always immediately visible.

Common Issues Associated with Pressure Washing

Pressure washing can lead to:

• Surface erosion of tiles

• Removal of protective coatings

• Water ingress beneath the roof covering

• Damage to membranes and underlay

• Dislodged ridge tiles and pointing

In many cases, problems only become apparent months later, long after the cleaning work has been completed.

Why Pressure Washing Is Still Used

Pressure washing is fast, visually dramatic, and requires minimal specialist equipment.

For general exterior cleaning, it has its place.
For roofs, however, speed and appearance can come at the expense of long-term protection.Pressure washing is fast, visually dramatic, and requires minimal specialist equipment.

A Safer Alternative

Our air-cleaning method avoids forcing water into the roof structure.

Instead, it focuses on:

• Controlled removal of moss and debris

• Preserving tile surfaces and coatings

• Protecting membranes and fixings

• Reducing unnecessary stress on the roof

This allows us to clean roofs without compromising their function.

A Balanced Approach

We’re not here to criticise other contractors or methods.

Our responsibility is to choose an approach that aligns with our priorities:

• Roof integrity

• Longevity

• Care over speed

That is why pressure washing is not a method we use or recommend for roof cleaning.

Request a Roof Assessment

If you’d like us to assess your roof and advise on the most appropriate cleaning method, you can request an assessment below.