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Maintenance advice
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Welcome > The stone > Maintenance advice
Maintenance advice
  Belgian Blue Stone is a natural, living material. Over the years it will acquire a beautiful patina. Its low porosity and hardness makes it a material which is particularly resistant to dirty marks and pollution. Outdoors, it does not require any special maintenance. Indoors, there are some simple actions required so that your Belgian Blue Stone retains all its charm and takes on a patina which blends perfectly with your interior, whether modern or classic.


Newly laid floor

Firstly allow them to dry!
If your Belgian Blue Stone tiles have just been laid, it is essential that you let them dry for a period of at least three months. During this time, you are advised to clean them using only a damp cloth and clean water.

Everyday cleaning

Indoors, Belgian Blue Stone simply requires a natural linseed or olive oil based neutral soap. Wash the tiles with l warm soapy water, without rinsing. Wipe using a cloth soaked in warm water and wrung out. The soapy water nourishes the stone and softens any micro-scratches.

Specific treatments

The polished finished is the most delicate to clean since its smooth, shiny surface can be marked by acids (lemon, coke, wine, vinegar etc.). That is why less shiny finishes are recommended since they are easier to clean (Dark Honed, Blue Honed, Rough Sawn, Natura Bleu, Natura Light etc.).
The Sawn, Milled or Natura Light finishes can be treated with vegetable oil (olive) or more traditionally with a little linseed oil diluted in turpentine. This protects the stone from acid attacks or grease marks if the stone is used in rooms like the kitchen where this may occur. It is important to note that this operation slightly darkens the stone. If you want to retain the light colour of these types of finishes, it is better to use an oil repelling product.
For grease marks, there are special detergents available. For specific treatments, powdered spray stain removers effectively remove grease marks on any finish (even polished) without changing the appearance of the surface.
Transparent water repelling products can be applied to clean dry tiles after laying. This application will need to be renewed approximately every 4 years.

The hardness of the water in the area can also leave chalky white marks. It is therefore advisable to regularly wipe down the shelf or work surface and especially the area around the taps. Since Belgian Blue Stone is a limestone, extremely acidic de-scaling products are obviously forbidden in order to avoid altering the surface finish. Several drops of linseed oil on a cloth will coat the surface of the stone and help with cleaning. Oil and water repelling products can also be used.

Superficial micro-scratches which appear over time fade easily with daily cleaning using linseed oil based soap.

Polished shine
Treatment with natural uncoloured wax allows the polished shine to be retained or obtained.
If the need arises, the use of a suitable floor polisher can prove useful (see our network of stone masons).

Principally concerning the Polished, Dark Honed and Blue Honed finishes.
If slight scratches appear in frequently used areas, use a natural white wax before polishing with a floor polisher. The mechanical action of the disk will repolish the stone and light scratches will be softened and become part of the patina.
In the case of deep scratches, the stone can be repolished on site.


Everyday cleaning

Since Belgian Blue Stone is not porous, no cleaning products are necessary. It dries really quickly and vegetation does not form on it. Water and a brush are sufficient to clean your Belgian Blue Stone terrace.
It is possible to use a high pressure hose, but this could damage the joints. If this treatment does prove necessary, you are advised to look at reducing the pressure.

Spring clean

Winter leaves marks, so to freshen it up again leave a bleach solution to act on the Belgian Blue Stone. Brush and rinse with clean water. Alternatively, in humid weather, sprinkle the Belgian Blue Stone surface with washing powder, brush, leave, and then brush again before rinsing with clean water.

Exotic wood

After a winter outside, exotic wood garden furniture can leave brown marks on Belgian Blue Stone. If this happens, simply cover the mark with a solution of 100g of oxalic acid per litre of cold water, and then rinse with water.

Renovation of old Belgian Blue Stone outside

A terrace, a doorstep, a garden ornament which has never (or badly) been maintained can be given a new appearance by pouring a liquid solution of potassium alum over the stone. Leave for a night then rinse.

Urban graffiti

Wall cladding and base plinths can potentially be protected with an anti-graffiti product. We would advise that you carry out an initial test to ensure that the product in question does not alter the colour and texture of the stone too much. Also, request references and written guaranties from the supplier.

In order to meet your expectations as best we can, we have prepared a list of frequently asked questions.    

Brochure to be downloaded
We have published a brochure which may be of great use to you. Please do not hesitate to download it.
La pierre bleue, c'est facile (in french)
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