Keystone Preservation is the most accredited surface cleaning company in the UK. Our ‘Excellence as Standard’ approach has seen us being awarded with ISO9001 2015, ISO14001 : 2015, OHSAS18001 : 2007 and PAS99:2012. Keystone Preservation is also proud of our industry accreditation’s DOFF and TORC Rosette Scheme, CHAS, Safe Contractor and our membership to The Guild of Master Craftsmen.
what makes us different
We specialise in stone cleaning and restoration using our DOFF Super heated Steam System and TORC Controlled Air Abrasion both are manufactured in the UK by Stonehealth Limited and are the premium choice for sensitive Historic projects as well as more generally in commercial applications.