Deck level swimming pools are very popular just now, and as a result there is a need for drainage grilles, specifically designed for the this kind of pool. Stoneworld are able to design and make 2 or 3 part coping systems that incorporate drainage grilles in stone that will match the surrounding paving or flooring. This creates a very elegant unified look to the pool area.
What is the best way to clean cement stains from natural stone?
We are writing this blog to try and help you avoid what happened to a lady who contacted us recently.
Mrs B had unfortunately had her Kandla Grey Sandstone patio damaged by her contractors, who were woefully uninformed about the right way to install and care for natural stone.
In their attempt to remove spilled cement (2) they have caused rust staining (1) by using the wrong product for the job
Luckily, Stoneworld have been able to help her rectify the situation. We understand stone and how to care for it. We urge all our customers to take our advice which we are more than happy to give about any aspect of stone care and maintenance.
Natural stone surfaces are versatile hardwearing and beautiful products to use, and investing in them will add ambience and value to your home.
Generally, they are very easy to care for but there are a few things that you need to think about when choosing cleaning products to use on them.
Please take note of this very important message:
NEVER USE BRICK ACID ON NATURAL STONE SURFACES.
Why is brick acid the wrong product to use on natural stone?
It is too harsh, extremely corrosive, and on certain stones will cause chemical reactions that will result in severe rust staining to the surface, spoiling the appearance of your stone patio or floor.
The high content of hydrochloric acid in brick acid is simply too harsh and corrosive to use on stones like sandstone, limestone, granite and slate.
Not only will it destroy the surface by eating into it, it will draw iron deposits from within the stone if they are present. Some stones are more susceptible to iron staining than others, but in this example you can see that the use of brick acid on Kandla Grey Sandstone has created a really strong reaction bringing iron to the surface and leaving a strong yellow stain on the staone.
Back to our case study:
Mrs B now needed a product to remove the rust staining that has occurred after the wrongful use of brick acid.
Plus, she still needed an effective cement remover for the remaining cement spillage on her patio.
What is the right product to use on natural stone to remove rust stains?
To remove the rust stains we recommend Rob Parkers Best Rust Remover. This product will remove the orange brown deposits that come to the surface of some stones.
Besides this unfortunate incident where brick acid has drawn rust deposits from within the stone, rust can leach out from some stones naturally.
The use of certain lawn feeds and weed killers also contain ferrous sulphates which can cause rust leaching from natural stone too. We recommend swilling away any spillages of feed/weed treatments promptly to avoid staining.
Read a previous blog where we have successfully treated some old paving of ours with Rob Parkers Rust Remover>> which has brought it back to as new condition
What is the right product to use on natural stone to remove cement spills?
For the removal of cement spillage on natural stone Stoneworld recommend the use of
Rob Parkers Best ConClear.
It has been formulated using a much gentler ingredient, glycolic acid. Whilst our product is manmade, it mimics the glycolic acid that occurs in nature and can also be derived from cane sugar. This substance has low corosivity, and is biodegradable, making it gentler on your stone and is kinder to the environment.
Rob Parkers Best Conclear is highly effective and environmentally kind. It is ideal for use on natural stone surfaces, and will also work on many other substrates,
We are happy to report that our advice to Mrs B has restored her Kandla Grey Sandstone Patio to its former glory.
Porcelain Paving needs to be laid slightly differently to natural stone paving. To get a good result, please follow this method to lay Porcelain Paving.
In this project the customer has chosen Crystal White from our SummitStone quartz worktop range.
My Kandla Grey Patio has discoloured, can it be restored?
Kandla Grey sandstone paving is currently very popular due to its contemporary grey tones, which are a frequently chosen theme in all areas of home design presently.
After a period of time Kandla Grey paving can discolour, showing yellow to orange staining on the surface which is difficult to remove. These stains are caused by iron deposits which occur naturally within the stone. Over time these deposits are leached from within the stone and become present on the surface, potentially ruining the overall appearance of the stone landscaping area where they are present.
The process of leaching is helped by our (usually) damp climate, and although this process is a totally natural occurrence, it is undesirable to most people, who will have selected Kandla Grey for its pale grey colour.
What can be done about the discolouration of my Kandla Grey Patio?
Firstly, we advise you to reduce the problem by buying your Kandla Grey sandstone paving from a reputable stone merchant. Here you will find that rather than select he cheapest material available from the quarries in India, care will have been taken to select a better quality stone. For instance, at Stoneworld we specify a particular seam in our favoured quarry in India for the selection of our Kandla Grey Sandstone Paving. This ensures that we have a product that has less iron deposits embedded within it from the outset. If you buy a cheaper product, it is possible that you will be purchasing material that we have rejected, and it will therefore have higher density of iron deposit embedded in it storing a problem for you later. This will not be visible at the point of purchase, but the discolouration will occur at a faster rate than with a better quality sandstone purchase.
That said, discoloration may occur in any Kandla Grey sandstone to some degree.
There is a product that can be used to remedy this situation, and the results are impressive.
Rob Parker’s Best Rust Remover has been found by us to be highly effective at removing rust staining from Kandla Grey Paving.
Recently, at Stoneworld we gave our display area a deep clean.
Before Cleaning with Rob Parker’s Best Rust Remover
After Cleaning with Rob Parker’s Best Rust Remover
This area was laid 14 years ago, and you can see here the ‘before’ image of the Kandla Grey Paving is only showing slight discolouration even after more than a decade of our damp weather conditions. (summer 2018 excepted!) This is due to the extra care we take when selecting the paving we sell.
You may experience far worse discolouration, but Rob Parker’s Best Rust Remover is capable of achieving a very effective job at restoring your patio whatever the degree of rust staining.
The ‘after’ image shows how effective the treatment can be.
We suggest you use it on your stained Kandla Grey Paving to bring it back to its former glory.