As we all know sandstone is a porous rock and though it may make a wonderful patio you will undoubtedly find that over time it will begin to lose its lustre and the colours will start to dull. It is also susceptible to stains, and there is certainly a long list of culprits that can cause your sandstone paving to stain, everything from mildew to the weather, spilt drinks (red wine is the worst) and grease stains from your bbq to a potted plant that you have left on the sandstone can all leave unpleasant stains on your paving.
So, how to clean sandstone paving? Well the first thing is to ask yourself how long has the stain been there? And remember that because sandstone is porous the longer a stain is left the more it will soak in and the harder it will be to remove. For the cleaning of the stones, you should know the kõnniteekivide paigaldus process. It will result in effective cleaning of the dust and dirt from the place. The removal of the stain is from the cloth available with the person. It will make the stones glow and shine at the place.
Luckily the vast majority of stains can be successfully removed with a little elbow grease and some household bleach, simple mix 3 parts of warm soapy water with one part of bleach, apply to the stained sandstone and using a soft bristle brush gently try to scrub the stain away. Rinse with clean water and review. If the troublesome stain remains, reapply the mixture but this time allow the solution to soak in before scrubbing, hopefully this will have solved the problem.
If you are still not satisfied with the results you can try using a poultice, which consists of equal parts warm water and bleach. Shred some old newspaper, soak them in the mixture, ring some of the excess water from the poultice and apply directly to the stain and allow to dry. By using this method you are
trying to make the porous sandstone pavers work in your favour. The sandstone will draw the solution down and as the poultice begins to dry it will draw some of the moisture back and hopefully bring some of the stain up with it.
And for the really tough stains.
And for the really embedded stains that just won’t budge no matter what you have tried you can concoct another poultice, this time by making a paste of equal parts of talcum powder and a substance called acetone, you may find acetone difficult to find but the best place to try is in your local pharmacy. If you have no luck here you can instead use nail varnish remover as it contains traces of acetone. If you decide to use nail varnish remover, be aware that the poultice will not be as effective so you will need to reapply. Once your poultice is made apply it to the stained sandstone, and then tape a plastic bag over the whole area so it is protected from the elements, allow 24 hours for it to work its magic, remove the poultice, allow to air dry and then inspect the results.
Without the use of more corrosive chemicals the methods above are by far the most effective, but here are some other ways to clean your sandstone pavement.
Water jets and power washers; caution is to be advised when using this method, water jets can damage sandstone pavements, especially if the sandstone slabs are old and relatively brittle. Never use any water jets above 900 PSI. With that said it is a more effective way to clean a larger area of sandstone. For best results with a power washer make a 3:1 solution of water to bleach and use in conjunction with the power washer. Bio degradable detergent can also be used in place of bleach
Lastly; before you tackle those stains please be aware that sandstone can be quite fragile and brittle especially old sandstone that has faced the worst of the elements for many years so please be careful and remember not to use a power washer over 900 PSI and if you do decide to use some specialist chemicals remember that prolonged use can change the colour and complexity of your sandstone pavements.
Hopefully the information you have found here will prove effective in removing stains from sandstone, if you have any other methods that you have found to be effective please share them, or if you have a specific problem with your sandstone paving please post it in the comments and we will do our best to help.