sealing Terrazzo Archives - South East Wales Tile Doctor

Terrazzo Hallway Floor Renovation Bishop of Wales Residence Cardiff

Terrazzo Hallway Floor Renovation in Cardiff for the Archbishop of Wales

After undertaking restoration work for Catholic churches in the areas of Wales and England over the past years, I was recommended to the team who maintain the personal residence of the Archbishop of Wales in Cardiff. They had decided to restore the Terrazzo flooring at the property and I was invited over to quote for doing the work.

The flooring had seen many years of wear and tear due to the nature of the building and the amount of footfall relating to meetings and staff. They were delighted to have found us and I was more than happy to get involved and be able to reassure them that I was confident the floor could indeed be restored to its former glory.

Terrazzo Floor Before Renovation Bishop of Wales Residence Cardiff

I attended a meeting at the property with the church architect to discuss the work needed and talk about the history of the property. It turns out the floor had been covered in carpet and this had been giving people at the property an allergic reaction due to dust accumulating in its thick pile. After removal of the carpet, they discovered the original Terrazzo floor underneath and decided it would be best to have that renovated.

The Terrazzo suffered from numerous issues including adhesive staining and the imprinted pattern of the carpet underlay, fortunately however there were no cracks which can be an issue with Terrazzo floors of this age. Having surveyed the floor I explained the method of work needed to the architect, and we then agreed the price and arranged to carry out the work on a time schedule that suited.

Cleaning and Repairing a Terrazzo Tiled Hallway Floor

To start the restoration process, I began by scraping as much of the remaining adhesive and other contaminates off the surface of the floor with a handheld scraper attached with a 6-inch razor blade. Then I was able to run over the Terrazzo with a coarse 50-Grit diamond pad fitted to a rotary floor machine, this was followed by a 100-grit then 200-Grit pad to remove more ingrained residues. Water is used to lubricate this process and the slurry generated is rinsed off after the application of each pad and extracted with a wet vacuum.

The next stage was to polish the Terrazzo using a set of less aggressive burnishing pads, starting with a Tile Doctor 400-grit pad then a 800, 1500 pad again using water to lubricate the process, rinsing with water between pads and vacuuming the waste as I worked.

Sealing a Victorian Tiled Hallway Floor

The Terrazzo was left to dry out overnight and the following morning the floor was tested for moisture with a damp meter. I do this to avoid applying sealer to a damp floor which can lead to an uneven finish. In this case the readings were fine so I was able to move on to apply the sealer.

The sealer used was Tile Doctor Colour Grow which contains a colour enhancing ingredient that lifts the colours in the stone whilst providing a durable hard wearing sealed finish. Additionally, this product is fully breathable which is an important consideration when sealing old floors like this that won’t have a damp proof membrane.

Terrazzo Floor After Renovation Bishop of Wales Residence Cardiff

Once completed the entrance hall looked a lot more welcoming for visitors, more importantly the Archbishop and the Architect were delighted with the result as they were initially unsure if it could be restored.

For aftercare cleaning going forward I recommended the use of Tile Doctor Neutral Tile Cleaner which is a mild but effective pH neutral cleaner that is safe to use on sealed floors and has a nice fresh smell.

Professional Restoration of a Terrazzo Tiled Hallway in South Wales

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Terrazzo Hallway Floor Renovation Barry South Wales

Grubby Terrazzo Hallway Floor Renovated in Barry South Wales

The customer from Barry in South Wales contacted Tiled Doctor to see if anything could be done to revive their Terrazzo hallway floor which was in need of renovation. I contacted them and arranged a mutual time for me to pop over a survey the floor.

Terrazzo is notoriously vulnerable to movement in the subfloor as it’s made from thousands of pieces of crushed stone including marble and laid as single slab so its not just as simple as replacing a tile should any cracks form. I’m pleased to say there was no evidence of any cracks, just signs of wear and tear due to the age of the floor and general maintenance issues.

Terrazzo Hallway Floor Before Renovation Barry

The customer was about to put their house on the market and the Estate Agent had advised them it would be best if they were to sort the floor out first. Naturally first impression count and the hallway would be the first thing any prospective purchases would see when entering the house. Ideally once deep cleaned and polished the Terrazzo floor would add some wow factor to the property and help turn those prospective purchases into buyers.

Deep Cleaning a Terrazzo Tiled Hallway Floor

To renovate the Terrazzo, no chemical products would be needed for the cleaning, just a set of diamond encrusted burnishing pads starting with a coarse 400-grit pad. The pads fit to a rotary floor buffing machine which is weighted to improve contact with the floor. The coarse pad breaks out the deepest stains, removing dirt and old sealers and each pad is passed over each tile four times. Water is used to lubricate the process and it isn’t long before this turns into a dark slurry. After each pad the floor is rinsed with a little more water and the slurry extracted with a wet vacuum.

Terrazzo Hallway Floor During Renovation Barry

This process was repeated with the 800 and 1500-grit pads again rinsing and extracting in-between. After a final rinse the last pad in the sequence which is a 3000-grit pad is applied dry with only a little water sprayed onto to the floor. This last pad is a polishing pad that adds a subtle satin shine to the Terrazzo.

Sealing a Terrazzo Tiled Hallway Floor

Due to the fact the cleaning process involved minimal amounts of water and the last pad is applied dry the Terrazzo was dry in no time and therefore ready for sealing. For sealing I had selected Tile Doctor Colour Grow which not only seals the floor but enhances the colours of the stone segments to achieve a beautiful result.

Terrazzo Hallway Floor After Renovation Barry

Once done the floor looked cleaner, lighter and all the little characterful motifs really stood out. The customer contacted me a week later to say that the estate agent was delighted with the decision to go ahead with the floor restoration as it had certainly transformed the floor.

Professional Restoration of a Terrazzo Tiled Hallway in South Wales

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Terrazzo Hallway Floor Restored in Cardiff

Restoration of a 1930s Terrazzo Hallway Floor in Cardiff

1 Comment / Cardiff Tile Cleaning, Terrazzo Floor Cleaning, Work by Category, Work by Location, Work History / Julian Iancono

Tile Doctor were appointed to restore a 1930’s Terrazzo hallway floor in Cardiff which was deeply ingrained with dirt after being covered with carpet for many years. Rather than coving the floor with carpet again the owner had decided it was time to have it restored having had our services recommended by a previous client.

After surveying the floor, I could see the carpet had been down so long you could see its pattern in the Terrazzo. I could see there was a large amount of ingrained dirt in the floor that would need to be flushed out which meant several cleans would probably be required. There were numerous cracks in the floor and in one area near a wall the Terrazzo had broken up and turned to rubble.

Terrazzo Hallway Floor Before Restoration Cardiff

Unfortunately, there was little that could be done to repair this, so we agreed to back fill it with cement and the owner planned to cover it with a timber boxing and then paint.

Cleaning and Repairing a Terrazzo Tiled Hallway Floor

To get the Terrazzo looking its best I planned to remove the dirt and restore the surface by burnishing the floor with a six-stage diamond polishing process. This would involve applying Tile Doctor burnishing pads of differing grits ranging from very coarse to very fine, rinsing between each pad to extract the soiling.

To start I applied a strong dilution of Tile Doctor Pro-Clean and left it to dwell and soak into Terrazzo for a short time so it could get to work digesting and breaking down the dirt. The first pad was then applied which was a very coarse 100-grit pad using the Pro-Clean for lubrication. The combination of the two lifted out the dirt from the heavily soiled pores of the Terrazzo where it could be extracted from the surface with a wet vacuum.

Terrazzo Hallway Floor During Restoration Cardiff

This process was repeated working through each of the six different burnishing pads, rinsing the floor along the way and extracting the soil after each pad. It was an arduous task, but it was rewarding to see the floor slowly come back to life.

With the floor clean the next stage was to make repairs to the various cracks. Terrazzo is poured onto the floor in one go and then polished to leave a unique and hardwearing surface, so you can’t simply replace a tile or cut out a section. What you can do however is to fill the crack with a resin or flexible grout colour matched to the unique colours in the floor. Once the whole floor had been sealed the crack should be difficult to spot.

Sealing a Terrazzo Tiled Hallway Floor

The next step would be to seal and protect the floor however it needed to be fully dry first, so it was left to dry for twenty-four hours and when I returned this was confirmed by taking several moisture readings with a damp meter.

The sealer of choice for this floor was Tile Doctor Colour Grow which is a fully breathable impregnating sealer which also enhances the colour of the stone chippings in the Terrazzo. This sealer is an impregnator that works by soaking into the pores of the floor rather than sittings on the surface, thus protecting it from ingrained dirt. Hallways are by their very nature a high traffic area so this should provide adequate protection and keep the floor in good condition for a long period of time.

Terrazzo Hallway Floor After Restoration Cardiff

Colour Grow is however a matt finish and my client had requested a very high sheen finish. So, after leaving the sealer to dry for 24 hours I returned to apply a further product called Tile Doctor Shine Powder which is a crystalline powder that is worked into the floor using a white buffer pad running at slow speed.

The client was delighted with the newly restored floor, as you can see from the pictures it looked so much fresher and of course free of dirt, not bad for a 90-year-old floor. For the aftercare of polished Terrazzo, I recommend Tile Doctor Stone Soap which is compatible with the sealer and will help maintain the patina.

Professional Restoration of a Terrazzo Tiled Hallway in Southeast Wales

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