Leaves, when they turn brown, can release tannin which is a very strong dye. Tannin is the stuff in tea that can stain a china tea pot so it is not surprising that it can stain stone surfaces.
Plants can also cause stains when green parts, bark, flowers and petals, pollen and seeds etc. fall on the stone.
Usually, these stains are relatively easy to remove using Biorase. Please ensure you read the Technical Instructions on the Product Page and pay attention to the Safety Information.
These methods are successful in more than 98% of cases.
Make sure you follow the instructions and Contact Us for help if you need it.
Do not use standard brick or patio cleaner as this is likely to contain hydrochloric acid which can be disastrous. Acids will not remove this type of staining in any case.
Pressure washing can be used but is not essential. Pressure washing can easily damage stone. If you use a pressure washer please read our guide first by clicking here.
Refer to full product guides and safety data on the product pages.
You need some knowledge to understand how to use a pressure washer in order to acheive the best results and avoid potentially serious damage.
Please read this article for guidance.
Don’t want to Do-It-Yourself? We can do the work for you or put you in touch with a contractor
Ask us a question or send us a picture of the problem and we will give you the benefit of 30 years of experience