What Is DOFF Steam Cleaning and How Does It Work?
At Alfresco Exterior Cleaning, we often get asked a simple question. What is DOFF steam cleaning, and why does it matter?
In short, DOFF steam cleaning is one of the safest and most effective ways to clean delicate surfaces. It is widely used across the UK, especially on historic buildings. More importantly, it cleans without causing damage.
So, What Is DOFF Steam Cleaning?
DOFF steam cleaning uses superheated water to clean surfaces. However, unlike standard pressure washing, it works at low pressure.
Instead of blasting dirt away, the system uses heat. Water is heated to temperatures of up to 150°C. As a result, it removes dirt, algae, moss, and biological matter with ease.
Because of this, it is ideal for:
- Natural stone
- Brickwork
- Render
- Heritage buildings
- Listed properties
In many cases, traditional pressure washing would cause damage. DOFF avoids that risk.
How Does DOFF Steam Cleaning Work?
The process is straightforward. However, the results are anything but ordinary.
First, water is heated inside a specialist DOFF machine. Then, it is delivered through a lance at low pressure. At the same time, the high temperature breaks down organic growth.
As a result:
- Algae and moss are killed at the source
- Paint and coatings can be softened and removed
- Dirt and grime lift away without force
Because the pressure stays low, surfaces remain intact. Therefore, there is no etching or surface damage.
Why Heat Matters More Than Pressure
This is where DOFF stands apart.
Traditional jet washing relies on force. However, force can damage stone, brick, and mortar joints. Over time, that damage becomes costly.
DOFF takes a different approach. It uses heat instead of pressure.
As a result:
- Surfaces are cleaned gently
- Structural integrity is preserved
- Long-term damage is avoided
For older buildings, this approach is essential. In fact, many conservation bodies recommend steam cleaning over pressure washing.
The Benefits of DOFF Steam Cleaning
There are several clear advantages. More importantly, they all centre around care and longevity.
1. Safe for delicate surfaces
Because pressure is low, there is minimal risk of damage.
2. Kills organic growth
Unlike basic cleaning, DOFF removes spores. Therefore, regrowth slows down.
3. No harsh chemicals required
In most cases, heat alone does the job. As a result, it is more environmentally friendly.
4. Ideal for heritage work
It is widely accepted for listed and sensitive buildings.
5. Long-lasting results
Because growth is treated properly, surfaces stay cleaner for longer.
Where We Use DOFF at Alfresco
At Alfresco, DOFF steam cleaning forms part of our wider exterior cleaning service.
We use it across Oxfordshire, including:
- Stone façades on period homes
- College buildings and heritage sites
- Commercial properties with delicate finishes
- Public walkways and stone paving
Because we combine DOFF with over 30 years of experience, the results speak for themselves.
Why Experience Still Matters
Equipment is only part of the story.
Anyone can hire a machine. However, knowing how to use it properly is what protects your property.
At Alfresco:
- We assess every surface first
- We choose the correct method for the material
- We work safely, often using our own access equipment
- We stand behind our work
As a result, you get a clean that lasts. More importantly, you avoid costly mistakes.
Final Thoughts
DOFF steam cleaning is not new. In fact, it has been trusted for years on some of the UK’s most important buildings.
However, it remains one of the best methods available today.
If your property needs careful, effective cleaning, DOFF is often the right choice. And when it is done properly, the results are clear to see.
