This Indian Sandstone Patio was laid three years ago at a property in the leafy residential Oxford suburb of Headington. The stone patio has not been properly cleaned since it was laid and I was contacted to see if it could be improved and to fill in the missing grout. You can see from the photograph it was in a shocking state and had completely discoloured after being exposed to the ravages of the UK weather and was now turning green with staining from the trees.
Except for the grouting the patio was physically solid and I assured owner that with the right treatment we could renovate the stone to bring back the colour and character of the Sandstone.
Renovating an Indian Sandstone Patio in Headington
On arrival I sprayed the patio with Tile Doctor Patio & Brick Driveway Cleaner and left it to soak in and get to work for about half an hour. The patio was then scrubbed with a rotary machine fitted with a carbide brush. I then rinsed the whole patio with water to remove the soiling. Being a very hot day, it dried very quickly and I was able to inspect the patio and repeat the process focusing on the stubborn staining and to make sure the black spots were removed.
With the patio clean I was able to get a better view of the cement grouting which was cracking and crumbling in places. Rather than patching it up I discussed the problem with the customer we decided that the cement grout had to go completely. To do this I used a mortar rake and an angle grinder, it was laborious work but, in most places it came out easily. With the old cement grouting cleared away a new resin-based grouting compound designed for external use for installed.
The whole job took 1 1/2 days to complete and was unrecognisable from the original.
I did recommend sealing the stone with a product such as Tile Doctor X-Tra Seal which is designed for external use however the owners were so pleased with the new look of their patio they decided to leave it as is.