Stone Restoration

Quadriga stone restoration services will sympathetically conserve and restore masonry, preventing further deterioration. As well as structural safety, we restore the aesthetic appearance of the building, from offices and shopping centres to heritage landmarks and monuments.

Common causes of stone masonry failure include incompatible materials being placed beside one another, inadequate weathering protection, and poor quality masonry repairs. The use of hand mortars in re-pointing is a common cause for stone deterioration.

External stonework often requires stone cleaning in order to adequately identify concealed defects. Once diagnosed, various methods can be adopted depending upon the type of stone masonry and the extent of the decay.

Masonry restoration techniques

Stone restoration and repair options are broadly the same as those used for other types of masonry, and include complete renewal, in situ surface restoration, or consolidation.

If an area of stonework is defective and needs to be replaced, new pieces of carefully matched masonry can be indented into an existing structure to replace defective areas of stonework.

A defective area of masonry can be cut out and repaired using restoration mortar. The area of repair is dampened and stainless steel dowels are fixed into the host area of repair if required, before the area is restored forward with mortar to its original line and profile.

Masonry consolidation is ideal for areas of unstable or loose stonework. Grout is pumped into the unstable masonry structure to bind the masonry together while producing what is in effect an invisible repair. Pinning can be used to fix loose pieces of masonry to the main structure and improve the stability of the substrate. Stainless steel dowels are drilled into the stonework and fixed in place with epoxy resin.

Materials we restore

  • Natural stone restoration: When restoring facades of natural stone it is preferable to replace defective sections with new stonework, ideally from the original quarry or location.
  • Reconstituted stone: For heavily ornamental stone or where constraints prevent the use of natural materials, reconstituted stone made from graded stone dust, silica sands, cement and bonding agents provides an alternative.
  • Terracotta and Faience: A highly decorative, fire glazed and kiln dried product requiring skilled craftsmanship to manufacture. Working closely with one of the only remaining manufacturers in the UK, Quadriga offers specialist replacement, new build and in situ repair services.
  • Stucco and Render: Replacement of stucco and render requires the specialist use of polymer-modified mortars or lime-based render systems.
  • Brickwork repairs: Failed brickwork may either be replaced by indenting new bricks or restored in situ using similar techniques to those used in stone restoration.
  • Terrazzo and Marble restoration: Specialist chemicals are used to degrease and clean marble and terrazzo to remove the build-up of dirt deposits prior to repair and re-polishing.

To find out more about our masonry and stone restoration services, contact us on 0808 100 3777 or


Why use Quadriga?

  1. A team of multi-skilled specialists
  2. Experienced historic building restorers
  3. Dedicated to innovation
  4. Understand traditional and contemporary materials and techniques
  5. Quadriga believe in conservation

Contact Us

01606 330 888