Barbour Product Search is part of the Informa Intelligence Division of Informa PLC

This site is operated by a business or businesses owned by Informa PLC and all copyright resides with them. Informa PLC's registered office is 5 Howick Place, London SW1P 1WG. Registered in England and Wales. Number 8860726.

Specialist stone cleaning for iconic London church

Specialist stone cleaning for iconic London church

Restorative Techniques was specified to carry out the specialist stone cleaning to the iconic spire of St. Brides church in Fleet Street.

The church was heavily bombed during the Second World War, although the iconic spire largely survived. It was, however, suffering from very heavy sulphation (in excess of 25mm), and SMB was contracted to undertake the removal of this.

Restorative Techniques’ initial approach was to carry out timed nebulous spraying techniques to soften the soiling prior to using the Therma Tech and Vortech systems. It became apparent quite quickly that the internal sulphation had an insoluble resin like property, unlike the external soiling which responded to the nebulous method. The company were able to remove the majority of the soiling using hand tools, followed by the super heated steam to remove any underlying soluble soiling.

The Vortech system was adopted for the removal of the final layers in conjunction with Aluminium Silicate 250 media. Working with three units simultaneously within the confines of the spire was a challenge, with each cleaner needing to adjust their own pressure and media flow rate to suit the changing tenacity of the soiling encountered.

By adapting the processes to the needs of the building, Restorative Techniques were able to make up lost ground and efficiently remove the sulphation whilst avoiding over-saturation of the stone work, thereby preventing rust staining. As a result, the original surface of the stone was once again revealed with the patina and masons tooling marks still intact.

Add to Project Board

Create a new project board:

View Swirling vortex cleaning equpiment: VorTech Product Entry
Restorative Techniques Ltd

Restorative Techniques Ltd

Restorative Techniques is an innovative supplier and manufacturer of surface cleaning systems and products. Its technical expertise of materials and substrates is based both on professional knowledge and also long experience in the use of safe...
View company profile
T(01454) 417831
E[email protected]
WVisit Restorative Techniques Ltd's website
 UK & Worldwide, Gloucester Road, Rudgeway, Bristol, BS35 3SG

Make an enquiry to Restorative Techniques Ltd

You may also be interested in this related Case Study: Medieval limestone restoration at St Albans Read Now