Specialist cleaning and surface restoration of stonework to remove contamination and restore appearance
without damaging the stone.
• Safely restores the natural appearance of stone surfaces
• Removes algae, staining, pollution, and environmental build-up
• Suitable for both historic and modern stonework
• Uses controlled methods to protect fragile or aged stone
• Helps slow long-term deterioration caused by weathering
UK-Based Specialists in Stone Restoration
APT ICC provides professional stonework restoration services across England and Wales, supporting commercial buildings, public spaces, heritage sites, and modern developments constructed from stone. Our work focuses on carefully cleaning and restoring stone surfaces while preserving their structural integrity, surface texture, and visual character.
Stonework restoration is sometimes referred to as stone cleaning, masonry cleaning, or stone surface restoration. While these terms are often used interchangeably, the aim is always the same: to remove unwanted contamination from stone without causing damage or accelerating future deterioration. This is particularly important on older or historically significant buildings where incorrect cleaning methods can permanently harm the surface.
APT ICC has extensive experience working with a wide range of stone types, including Bath stone, limestone, sandstone, and other natural and reconstituted stones. Common issues addressed include algae and biological growth, pollution staining, efflorescence, paint residues, cement and concrete splashing, and general weathering that dulls the appearance of stone over time.
Every stonework restoration project begins with a detailed assessment to determine the most suitable cleaning approach. Depending on the stone type, age, and condition, this may involve gentle abrasive blast cleaning, low-pressure steam or DOFF cleaning, soft washing, or carefully selected chemical treatments. The chosen method is always tailored to the stone to ensure effective cleaning while retaining surface detail and strength.
Stonework restoration is commonly required for town centres, public buildings, commercial properties, and heritage assets where appearance, safety, and longevity are important. APT ICC has delivered stone cleaning and restoration works for sites including Newport Castle for Cadw, town-centre stone surfaces in Ebbw Vale, historic clock towers in Anglesey, commercial stone façades for JLL in Leeds, and stonework at former general offices in Ebbw Vale.
With over 35 years of experience, APT ICC is trusted to carry out stonework restoration in sensitive, live, and high-profile environments. All works are delivered under strict health, safety, and environmental controls, ensuring reliable, high-quality results across England and Wales.
“I would like to express my sincere thanks to APT for the excellent job they carried out at Tai Bach. The project was a much needed one and now that it is completed it has really helped to improve the look of the town. We have received many good comments from the public which is always a good sign.”
Kevin Hiller - Property Surveyor, Neath & Port Talbot Council
“We employed the services of APT to renovate a Grade 2 Listed Building. Under the directive of Cadw we were not allowed to use any wet process or chemicals within the interior of the building. APT used Soda Blasting on sandstone, brick, ceramic glazed tiles, metal work, paintwork on ceilings, coving, woodwork and ornate fixtures.
It was a great achievement to have one system for all the surfaces that needed cleaning and restoring and one that also ticked all the boxes of the environmental and conservation officers. The process saved us both time & money in being able to have just one company on site. We are very grateful to APT for their hard work on this project.”
Tim Luke - Gee Construction
“I would like to thank APT-ICC for their excellent work and assistance on the Barclays Bank project. They delivered the scheme and additional works on time and without issue thanks to Andrew and his team for all your extra effort, long hours and commitment. I look forward to using them on future renovations.”
Graham Lowe - Project Manager, Overbury Plc
“We have been receiving an overwhelming number of positive comments about the war memorial cleaning. Yesterday, during the small ceremony at the Penrallt column on the 1st World War anniversary, many expressed their appreciation for how splendid the memorial looks after the cleaning. We anticipate sharing photos on the internet page later this week. Additionally, we have shared your details with another person who serves as the clerk to two other local councils. Thank you once again for the exceptional work.”
Janice Davies - Gwynedd Council
Stonework restoration involves carefully cleaning stone surfaces to remove staining, algae, pollution, and surface contamination. The aim is to restore appearance while protecting the stone’s texture and strength. Methods are chosen based on the stone type and condition.
Yes, when carried out correctly. Historic and listed stonework is assessed so gentle, controlled methods are used. This helps preserve surface detail and prevent long-term damage.
Common stone types include Bath stone, limestone, sandstone, and other natural or reconstituted stones. Each type reacts differently to cleaning. An assessment is required to select the safest approach.
In many cases, yes. Works are planned to manage dust, access, and safety in live environments. This allows restoration to take place in town centres, public buildings, and working sites.
Common issues include algae and biological growth, pollution staining, efflorescence, paint residues, concrete splashes, and surface dulling from age. Restoration improves appearance without over-cleaning. The focus is preservation rather than alteration.
Small, low-risk areas may be manageable internally. However, incorrect methods can permanently damage stone surfaces. Specialist experience is usually required for larger areas or sensitive stonework.
No, not when done properly. Controlled techniques are selected to clean without excessive abrasion or surface loss. Damage typically results from aggressive or unsuitable cleaning methods.
APT ICC delivers stonework restoration services across England and Wales. We work on commercial, public-sector, and heritage sites and can also advise on suitable specialist products where full restoration is not required.
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