how to remove stains from sandstone patio

In this guide, we’ll show you how to remove stains from the sandstone patio on your property. 

You might still remember the first time your sandstone blocks were laid down in the outdoors of your house. Sawn and honed sandstone give off a fine and pristine look to the space. But, just like any other thing, they deteriorate over time.

Indian sandstone is a popular choice among homeowners in the UK because of its simple yet versatile outlook. Being a natural stone, it is susceptible to damage from footfall, surrounding weather, and nearby foliage. Regardless of the external factors, you can increase its lifespan by cleaning it regularly.

Types of Indian Sandstone

Indian sandstone is the number one choice of garden paving for patios and driveways. It instantly adds a touch of class and sophistication to your outdoor space with minimal investment.

Interestingly, it comes in many colours and textures. Some of the popular types include:

  • Camel dust Indian sandstone
  • Sandstone driveway
  • Rainbow Indian sandstone
  • Fossil mint Indian sandstone 
  • Kandla Grey Indian sandstone
  • Autumn brown Indian sandstone
  • Blue sandstone
  • Raj green sandstone
  • Rippon buff Indian sandstone

What Causes the Stains on Sandstone?

Knowing about the root cause of stains on your paving stones is important. It helps you determine the appropriate cleaning solutions and sealants to restore the look of your sandstone setts. 

If your sandstone pavement is installed around your garden, then it might be affected by dirt, algae, lichens, and moss. Out of these offenders, dirt makes it to the top of the list. The negative charge of dirt carried by humid winds makes it easy to attach to the paving.

Noticing green discolouration on your Indian sandstone driveway? This mainly occurs in a moist environment when algae and moss are formed on natural surfaces. The tiny spores of algae can rapidly turn into a massive colony if the surface is left uncleaned. 

How to Clean Sandstone

Indian sandstone paving is highly sought after in Britain because of its rustic appearance and depth of shades. A sandstone cladding goes well with almost all types and sizes of patios.

Before you randomly grab a cleaning solution, make sure to identify the intensity and spread of the stains. Choose your cleaning chemicals carefully because many of them contain hydrochloric acid. Similarly, some fungicides used for removing moss and algae can cause permanent damage to the sandstone surface.

Let’s look at some safe methods you can try to remove stains from your sandstone patio and driveway.

1. The Easy Cleaning Approach

Before trying out any chemical-intensive cleaning method, try cleaning your paving with soapy water. Add liquid soap in a bucket of water and mix it all up. Pour the mixture over the sandstone slabs and scrub it with a brush.

Once you are done with the scrubbing, rinse it all clean by pouring fresh water. Let it dry overnight, and then see if there are still any stains left. You can repeat the process if you still notice dirt deposits.

2. Cleaning with Bleach

If you’re dealing with moss and algae buildup on the paving, then a household bleach solution might work. Sodium hypochlorite found in bleach can help you get rid of current moss colonies.

Make sure to use a diluted concentration of bleach to avoid causing permanent damage to the sandstone. 

First, you’ll need to remove any loose debris and dirt from the surface of the paving. Then, add equal amounts of water and bleach to a bucket. Pour the diluted mixture over the stained parts of your patio and let it sit for about 30 minutes. Finally, scrub off the sandstone grout and upper surface with the help of a stiff brush. 

3. Steam Cleaning Sandstone

This is one of the safest methods when you are attempting to clean your sandstone patio. Without the use of any harsh chemicals, you will be able to restore the look of your outdoor space. 

Steam cleaners give off superheated streams of water vapors at a temperature up to 150°C. At this temperature, you will be able to slowly break down colonies of lichen. Lichen is formed by the symbiotic partnership of fungus and algae in a specific area – which is usually highly humid. 

For thorough cleaning, it is always better to get professional stain removal services. Make sure to let the professionals do this crucial task for you.

4. Cleaning with a Pressure Washer

If you want to remove stains from a large area, then using a power washer will get the job done. This high-tech equipment blasts out water with high pressure so that all buildup of dirt and debris can loosen up.

Make sure to use a pressure washer with a wide fan tip to avoid causing cracks in the sandstone. Never use a pencil jet, as it can break apart your entire sandstone patio paving.

Conclusion

You made it! We taught you how to remove stains from the sandstone patio with different cleaning methods. 

Now you can have that new look of your sandstone patio again without any unsightly muck. Make sure to perform patio cleaning at least once a month to avoid build-up of stubborn stains and marks.