What Is DOFF Steam Cleaning?

When your building’s exterior has lost its shine, the challenge is finding a cleaning method that restores it without causing damage. For heritage sites, stone facades, or sensitive brickwork, high-pressure jet washing can do more harm than good.

That’s where the DOFF Steam Cleaning System comes in – a specialist cleaning solution that uses controlled, superheated steam to remove dirt, biological growth, and pollutants with precision and care.

At Exterius, we’re a DOFF Approved Contractor, trusted across the UK to restore buildings safely and effectively, from heritage restorations in London and Birmingham to large-scale commercial cleaning nationwide.

What Is DOFF Steam Cleaning?

The DOFF system is a unique cleaning method designed for delicate and historic surfaces. It works by heating water to around 150°C, then delivering it at low pressure and low flow, ensuring no damage to the substrate.

Unlike traditional jet washing, DOFF cleaning gently lifts grime, algae, and pollutants without abrasion or saturation. This prevents moisture from being forced into porous materials like stone or brick, protecting the structure’s integrity.

In short:

Low Pressure: Safe for fragile surfaces such as stone, brick, and terracotta.
High Temperature: Steam loosens dirt and organic growth effectively.
Eco-Friendly: Requires minimal water and no harsh chemicals.

How the DOFF System Works

The DOFF machine heats water to create superheated steam. This steam is then applied using a controlled nozzle system, allowing the operator to adjust temperature, flow rate, and pressure to suit each surface.

The process:

Steam softens dirt and biological matter (like algae or moss).
The gentle pressure lifts contaminants from the surface.
The low water content means the surface dries within minutes, preventing trapped moisture or frost damage in colder months.

This combination of heat and precision makes the DOFF system ideal for both restoration and maintenance cleaning, even on historic or listed buildings.

Where DOFF Steam Cleaning Excels

The versatility of the DOFF cleaning system allows it to tackle a wide range of cleaning challenges:

1. Heritage and Listed Building Restoration

Safely removes decades of grime and pollutants from stone, brick, or terracotta without eroding the surface, which is ideal for Grade II listed buildings, monuments, and heritage landmarks.

2. Stone and Façade Cleaning

Revives discoloured facades affected by pollution, algae, or carbon staining, restoring the original look of the building while protecting its materials.

3. Graffiti and Paint Removal

DOFF steam cleaning can lift graffiti paint and coatings from delicate surfaces without abrasive chemicals or scrubbing.

4. Biological Growth Removal

Eliminates moss, algae, lichen, and fungi, then sterilises the surface to prevent regrowth, which is an essential step for long-term building maintenance.

5. Fire and Smoke Damage Cleaning

Removes carbon deposits and soot residues after fires, restoring surfaces gently and effectively.

Why DOFF Steam Cleaning Is the Gold Standard

The DOFF system offers several advantages over conventional cleaning methods:

Preserves surface integrity – No erosion or etching, even on sensitive materials.
Fast drying times – The low water flow means surfaces dry quickly, reducing downtime.
Eco-friendly cleaning – No harsh chemicals or excessive runoff.
Safe at height – Perfect for high-level cleaning using MEWP access.
Versatile and cost-effective – Works across all property types, from historic to industrial.

Why Choose Exterius for DOFF Cleaning

As an approved DOFF contractor, Exterius combines advanced equipment with decades of experience. Every project begins with a comprehensive site survey, allowing our team to tailor the cleaning process to your building’s material, age, and condition.

We operate across the UK, including DOFF cleaning in Birmingham, London, Bristol, Glasgow, and Manchester, with fully trained, IPAF-certified specialists ensuring safety and precision from start to finish.

When you work with Exterius, you get:

Certified DOFF specialists
State-of-the-art DOFF machines
Environmentally responsible cleaning
Full documentation and aftercare advice

Frequently Asked Questions (FAQs)

1. What can DOFF cleaning be used for? 

Stone, brick, terracotta, concrete, tiled surfaces, and even wood – ideal for heritage, commercial, and public buildings.

2. Is DOFF cleaning better than jet washing? 

Yes, for delicate or historic surfaces. DOFF cleaning uses low pressure and high temperature to avoid damage while still achieving deep cleaning results.

3. Can DOFF remove graffiti or paint? 

Absolutely. It lifts paint, graffiti, and smoke stains safely without harsh chemicals.

4. Is DOFF steam cleaning eco-friendly? 

Yes. It uses minimal water and no toxic chemicals, making it a sustainable solution.

5. Do you offer DOFF cleaning nationwide? 

Yes, Exterius provides DOFF cleaning across the UK including London, Birmingham, the Midlands, and all major cities.

Restore Your Building Safely with DOFF Cleaning

When appearance, safety, and preservation matter, the DOFF Steam Cleaning System delivers results that traditional cleaning methods can’t match. Whether you’re restoring a listed building, removing graffiti, or reviving a tired façade, Exterius has the expertise to protect and enhance your property.

Ready to see the DOFF difference? Get in contact to book your free site survey and discover how our DOFF cleaning specialists can bring your building back to life.