Time leaves its mark, Rokjet removes it with care and consideration.
At Rokjet, we specialise in low-pressure steam using ThermaTech+ and DOFF cleaning for listed buildings and heritage properties throughout Cheshire and the surrounding areas. Our conservation-approved methods are trusted by architects, heritage professionals, and property owners who need safe, effective cleaning for historic façades, masonry, stonework and brickwork.
Keeping a listed building in good condition isn’t just good practice; it’s often a requirement to protect its status and avoid enforcement action from local authorities.
Tailored Cleaning Solutions for Listed Buildings
Every listed building tells a story, and we’re here to protect it. Whether you’re managing a stately home, a church, or a period townhouse, our cleaning solutions are tailored to respect your property’s unique materials and character.

DOFF & ThermaTech Low-Pressure Steam Cleaning
Our DOFF and low-pressure steam systems gently lift dirt, biological growth, and pollutants without saturating or damaging the substrate. This method is particularly suited to historic stone, lime mortar, and aged brickwork. No harsh chemicals, no abrasion and no risk to delicate façades.
Safe for Stone, Brick, Masonry & Detail
We clean all types of exterior surfaces commonly found on listed buildings, including delicate sandstone, York stone, heritage brickwork, and lime-pointed masonry, safely and thoroughly.


Conservation-Approved Techniques
Unlike harsh pressure washing, our cleaning methods are in line with best practices in building conservation and heritage restoration.
Why Choose Rokjet for Listed Building Cleaning?
Our technicians handle every surface with the respect it deserves. We treat every cornice, keystone, and brick as irreplaceable. Because to us, they are.
- Experienced, Conservation-Aware Team
Our specialists are trained in building conservation principles and understand the importance of preserving historic finishes and original features. - Fully Insured & Trusted Across Cheshire and Surrounding Areas
From private estates to council-maintained buildings, we’re trusted across the region for our dependable service and proven results. - Respect for Historic Materials & Craftsmanship
We work with precision and care, using biocide treatments where appropriate, and only recommending techniques that align with your property’s listing requirements and long-term preservation goals.
Frequently Asked Questions

Is DOFF cleaning safe for listed buildings?
Yes. DOFF uses controlled, low-pressure superheated water to remove grime without harming delicate surfaces. It’s widely accepted by conservation officers and heritage bodies.
Can you remove growth on buildings without damage?
Absolutely. Our gentle cleaning methods safely remove biological growth like algae, moss, and lichen without disturbing the building fabric.
Do I need permission to clean a listed property?
In many cases, yes – especially if the work affects the character of the building. We can guide you through the process or liaise with your conservation officer if needed.
What causes dirt on a listed building?
Pollution, weathering, algae, and vehicle emissions are common culprits. Over time, they obscure architectural features and can accelerate decay if left untreated.

Request a Heritage Cleaning Quote
We’re proud to help preserve Chester’s rich architectural heritage. We don’t just clean buildings, we preserve their legacy.
Contact Rokjet today for a tailored quote on listed building exterior cleaning in Chester and the surrounding areas.