Terrazzo Floor Renovation at Cardiff University

Last summer I was asked to carry out a survey at one of the Cardiff University buildings where they were looking at having a large Terrazzo floor restored. The University was on its summer recess so with no students around it was an ideal time for major works to be carried out.

At some point in the past the whole floor had been covered in a layer of self-levelling compound ranging from 2mm – 10mm thickness, so it could be covered with square carpet tiles which had then been secured with adhesive. You can still see the outlines of the tiles in the pictures below. It’s hard to appreciate from the photo that underneath there’s a beautiful Terrazzo floor waiting to be rediscovered.

Terrazzo Floor Before Restoration Cardiff University

The University had removed the carpet tiles but were unsure of how to remove the screed without damaging the Terrazzo underneath and so asked me to quote for restoring the whole floor. I carried out a test clean on the floor first to show the architect’s and university staff an example of what could be achieved.

Terrazzo Floor Demonstration Clean Cardiff University

The method I used for the test sample was to use a process called milling with a 50 grit Milling Pad, which I used to grind off the levelling compound until the stone became visible underneath. The test clean took me a good hour to complete but the results I achieved proved very satisfying both to myself and the clients and I was awarded with the contract.

Cleaning and Restoring a Terrazzo Tiled Floor

On commencement of the work I realised after 4 hours of milling that this method although effective was very time consuming and extremely messy! So, I tried using a long handheld sharp scraper which turned out to be a lot faster and cleaner in removing the cemented compound. In the end it took four days for two men and a great deal of hand ache to remove the screed for the floor.

Terrazzo Floor During Restoration Cardiff University

After removing the compound, I started milling the floor with a Tile Doctor Milling Pads, first the 50 segment & then a 200-segment pad to cut deep in to the floor to remove the stains in the Terrazzo and scratches from using the scraper.

This was followed by burnishing the stone with a set of four Tile Doctor Burnishing Pads. This involves the application of four pads in sequence from a coarse 400 grit through to a very fine 3000 grit to refine the surface of the Terrazzo and improve the lustre of the floor with each grade of pad.

Terrazzo Floor During Restoration Cardiff University

Sealing a Terrazzo Tiled Floor

The architect had specified a hardwearing finish as this was a very busy entrance way for students entering the buildings. So, after finishing the burnishing of the floor with a very fine 3000 grit pad I sealed the floor with three coats of Tile Doctor Colour Grow which seeps into the pores of the Terrazzo protecting it from within enhancing the colours of the chippings in the process whilst providing maximum protection. Finally, we polished the floor after sealing with another application of the 3000 pad and a polishing cloth to shine the floor further.

Terrazzo Floor After Restoration Cardiff University

It was a large floor, so I managed the project in sections, and this enabled me to start on the cleaning of a new section whilst the floor was drying in the previous section. As you can see from the pictures the floor was transformed and looked great. Needless to say the University were very happy with the result.

Terrazzo Floor After Restoration Cardiff University

 

Source: Terrazzo Tile Cleaning and Repair Service in Cardiff, SE-Wales

Restoring an old Terrazzo floor

I previously restored an Quarry Tiled floor for the owner of this residence near Caerphilly Castle and was asked back to deep clean their Terrazzo hallway floor which was far from looking its best.

Terrazzo Hallway before deep cleaning near Caerphilly Castle Terrazzo Hallway before deep cleaning near Caerphilly Castle

Restoring a Terrazzo Floor

Terrazzo is a very hard surface and needs to be burnished to get the best results so after scrubbing the floor with Tile Doctor Pro-Clean and a black scrubbing pad to remove what felt like 100 plus years of black dirt I set about burnishing the floor with a set of diamond encrusted burnishing pads and a little water. The set comprises of four different grades of diamond pads ranging from coarse to smooth that produce a shiny clean surface. The floor is rinsed between pads to remove any slurry from the process and given another rinse at the end.

Sealing a Terrazzo Floor

The hard Terrazzo soon dried and I was able to seal the floor with the application of three coats of Tile Doctor Colour Grow which is a colour enhancing impregnating sealer which will prevent staining and make it easier to clean in future. Once the last coat was dry I and gave the floor a further polish with the 4th stage green pad to give a true deep shine.

Terrazzo Hallway after deep cleaning near Caerphilly Castle Terrazzo Hallway after deep cleaning near Caerphilly Castle

I think you will agree that what was once an old and tired terrazzo hallway floor now looks much better following its facelift, something that was only made possible due the quality of installation when first laid.

Source: Professional Tile, Stone and Grout maintenance service in South Wales