Is it safe on a listed building?

DOFF is the system widely accepted for heritage cleaning because it works at low pressure with no chemicals. We work to your consent conditions and method statement.

Will it blast holes in soft brick?

No. It is low pressure. The heat does the cleaning, so it is gentle on the substrate.

Do you use chemicals near my garden and windows?

DOFF is water and heat only for most work. We protect glass, planting and surrounds before we start.

How much mess and how long?

We survey first and give you a fixed plan. Run off is controlled and the site is left clean.

Illustrative image of DOFF steam cleaning on a stone facade

RESIDENTIAL AND HERITAGE DOFF CLEANING

DOFF steam cleaning for brick, stone and render that protects the surface

Superheated low pressure steam lifts paint, biological growth and pollution off period and listed surfaces without chemicals or abrasion. The system conservators specify, managed by A Star and delivered by our Stonehealth Rosette approved specialist partner under A Star RAMS. Covering London and the South of England.

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Stonehealth

Rosette approved partner

Gentle

Low pressure, no scouring

No chemicals

Steam and heat only

RAMS

Method statement agreed first

What you can count on

£10m Employers' Liability and £5m Public Liability (AXA, to February 2027)CHAS accreditedDulux Academy trainedDirector-led

01 / service

When DOFF is the right method

Period brick or stone has gone black with pollution.
Old masonry paint needs removing.
Render or stone has heavy biological growth.
A listed or conservation area property needs a method that matters.

02 / why DOFF

Why DOFF over sandblasting or chemicals

Historic surfaces cannot be cleaned like yard concrete. DOFF uses heat and low pressure so the surface is cleaned without abrasion.

Abrasion erodes soft historic detail

Sandblasting can take the surface with the dirt.

Chemicals can stain and leach salts

The wrong chemistry creates a second problem after the first clean.

High pressure drives water deep

Old brick and lime mortar do not want forced water behind the face.

Wrong method risks listed building consent

The cleaning method has to match the consent conditions, not just the stain.

03 / process

Method statement first. Steam clean second.

Survey and method statement

Inspect the surface, agree a test patch and write the method before work starts.

Protect surrounds and glass

Protect windows, planting, trims and nearby finishes before the steam goes on.

DOFF steam clean

Clean with superheated low pressure steam, managed by A Star and delivered by our specialist partner under A Star RAMS.

Inspect, rinse, clear down

Inspect the cleaned surface, rinse where required and leave the area clean.

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Scope · included

Survey and method statement
Test patch where required
DOFF steam cleaning by our Stonehealth Rosette approved specialist partner, under A Star RAMS
Protection, run off control and clear down

Scope · not included

Stone repair or pointing
Listed building consent applications
Painting or protective coatings unless quoted separately

Illustrative image of a stone facade before DOFF cleaning

Heritage method

The system conservators specify

Your home gets the same DOFF method and the same partner team we use on commercial and heritage facades. The method stays the same. The care goes up, because it's your home.

Frequently asked

Answers before the survey, not after the quote.

Is it safe on a listed building?: DOFF is the system widely accepted for heritage cleaning because it works at low pressure with no chemicals. We work to your consent conditions and method statement.
Will it blast holes in soft brick?: No. It is low pressure. The heat does the cleaning, so it is gentle on the substrate.
Do you use chemicals near my garden and windows?: DOFF is water and heat only for most work. We protect glass, planting and surrounds before we start.
How much mess and how long?: We survey first and give you a fixed plan. Run off is controlled and the site is left clean.

“It was a delight working with A Star decorators. They were able to complete interior and exterior painting faster than expected, and to a high standard. They kept me updated every step of the way and I would definitely recommend you use them.”
CallmeJaja · Google review

Request a method review

Agree the method before the job

We agree the cleaning method and a test patch with you first, so there are no surprises on a surface you cannot replace.

077 6178 1304 · mobile office@astardecorators.com