Micro concrete on tiles

Almost all of them!
Indeed, all ceramic, stoneware, mosaic and faux wood tiles that have been glued down can be covered with micro concrete.
If the tiles have not been glued down, but have been sealed in place, you’ll need to check their adhesion beforehand with the help of a qualified Marius Aurenti professional.

If the tiles are old and very porous, extra care is required. These include terracotta and porous limestone cladding, etc. These surfaces have usually been previously treated with waxes or oils. As they are difficult to remove, this will require more extensive sanding. If the waxes or oils have penetrated deeply, it will not be possible to create micro concrete on tiles. In the latter case, a professional will be needed for a proper diagnosis.

The advantage of using micro concrete over tiles is that it eliminates all the joints between the different tiles.

This doesn’t mean, however, that if there are expansion or separation joints in the house, they can be covered. This will ensure that the screeds and slabs underneath, and sometimes the walls too, can continue to work in line with ground movement and temperature.
A few joints may still be necessary when laying micro concrete over tiles, but the elimination of joints between tiles is truly spectacular.

At Marius Aurenti, creating micro concrete over tiles is considered a surface-intensive process.
For this reason, the minimum thickness of micro concrete should be 2 mm.
To this must be added the thickness of the epoxy mortar, which will depend on the level to be made up.
If the substrate is flat, this mortar will be 1 or 2 mm thick.
The micro concrete will be 2 to 3 mm higher than the existing tiles.

At Marius Aurenti, creating micro concrete over tiles is considered a surface-intensive process.
For this reason, the minimum thickness of micro concrete should be 2 mm.
To this must be added the thickness of the epoxy mortar, which will depend on the level to be made up.
If the substrate is flat, this mortar will be 1 or 2 mm thick.
The micro concrete will be 2 to 3 mm higher than the existing tiles.

Renovation work on a tiled floor is a little more extensive than that required for micro concrete on a new surface.
As explained in the protocol on this same page, this will require prior sanding, followed by the application of an epoxy mortar. Generally speaking, a job of this type will take between 5 and 7 days to complete, with a further three days drying time for light use, and a few days more for intensive use or in bathrooms.

The concept of price in the realization of a micro concrete on tiles is not an easy one to tackle, but here are several aspects that will influence the final price that an expert craftsman will offer you:

– Access to the job site will influence the price, since in big cities it’s more complicated to carry out jobs than in the countryside or small towns.
– The size of the job will strongly determine the price, as a small site often requires just as many steps, and therefore more round-trips in proportion to the surface completed.
– Differences in labor costs between countries will make it impossible to generalize a price.
– The presence of many different surfaces, several small rooms, niches and curves all have an impact on the final price of the project.

After a technical discussion with the Marius Aurenti teams, who will be able to give you a price range based on your surface area, we advise you to have the price specified by estimates drawn up by trained experts. Rates do not vary greatly on the same site, depending on the number of craftsmen consulted.
However, this will help you refine your budget.

It’s a classic Marius Aurenti micro concrete over tile in the bathroom!
Several jobs are carried out every week in this type of configuration.
Unlike a floor, in a bathroom you’ll need to cover vertical tiles, which is also possible with micro concrete.

Similarly, if in doubt, a liquid waterproofing system can be added prior to the installation of micro concrete in a bathroom renovation if the quality of the waterproofing cannot be verified beforehand.

Marius Aurenti’s micro concrete is therefore compatible with horizontal and vertical surfaces in dry rooms, as well as in wet rooms with the use of Liquid Waterproofing Systems (LWS).

At Marius Aurenti, we consider this surface to be far too dangerous, as there have been problems with the porosity of the joints over time and with adhesion, making this type of work far too risky for a professional.
Experience has also shown us that very few exterior pavements meet the standards expected by DTU 13.3. So there are two solutions for people with tiled exteriors: either remove the tiles and go back to the slab to lay micro concrete over them, provided the substrate is of good quality.

Producing micro concrete on tiles is surely the most complex exercise in millimetric micro concrete.
With the help of our tutorials and documentation, you can create your own micro concrete.
Our advice is to start with a small surface area for someone who is not familiar with the work, and for larger projects to put you in touch with a qualified expert.

You need the standard tools for applying micro concrete, plus special tools for sanding and applying epoxy mortar.
Here is the list of tools for micro concrete:
– American knife
– Smoothing machine or stainless steel, plastic 200mm or perfect liss 35 cm centimetres
– Ideally a double-bladed mixer, or at least a single-bladed mixer
– 30 kg scale, ideally with 5 g accuracy, or small kitchen scale for small areas
– Empty 5- and 30-litre buckets
– Yellow and purple soft masking tape (paint)
– Protective tarpaulin
– Water for rinsing materials and green brite tape for scrubbing!
– Gloves, mask (dust or vapor fffp2 for venis), coveralls, goggles, safety shoes
– Orbital sander and special 40 and 60 grit discs
– Monobrush for floor surfaces with special 40 and 60 grain discs
– Small and large rolls and sleeves
– 2 mm stainless steel rod for clean stops
– Auxiliary heating
– Extension cords
– Paper towel roll
And for epoxy mortar
– Diamond surfacer with
– 6mm notched comb

Marius Aurenti micro concrete is guaranteed crack-free for 15 years. The substrate is irrelevant. It is important to check the substrate for cracks beforehand during the substrate diagnosis. A fiberglass interlining can be recommended by an expert craftsman when making epoxy mortar.

The advantage of using micro concrete over tiles is that it eliminates all the joints between the different tiles.

This doesn’t mean, however, that if there are expansion or separation joints in the house, they can be covered. This will ensure that the screeds and slabs underneath, and sometimes the walls too, can continue to work in line with ground movement and temperature.
A few joints may still be necessary when creating micro concrete over tiled floors, but this eliminates the need for tile joints and some of the silicone sealants that darken over time and need to be replaced once a year.

After all these years of expertise, here are the floors considered at risk, on which it is not advisable to apply millimetric micro concrete:

• Tiled terrace
• Readitional terracotta
• Tomettes
• Sealed porous stones
• Tile laid on a flat slab
• Bonded or sealed tiles with moisture levels above 4% or significant moisture variations between joints
• Tiles glued to screed
• Glued tiles on wooden panels or other wooden structures
• Tiles bonded to other tiles
• Bonded or sealed tiled floor with delamination over more than 10% of the surface or areas that sound hollow
• Tiles laid on foam or polystyrene foam panels on the floor
• Cracked tiles

Applying micro concrete over tiles to mask existing defects runs the risk of these problems reappearing under the new covering. Waxed micro concrete should not be used as a mere window dressing.