The expert advice

Outdoor cotto: let’s see how to clean and treat it

11 May 2021

Today we are going to talk about an intervention on an outdoor cotto in Tuscany and the professional craftsman of the
RenovoArt company is going to explain us how to clean and maintain an outdoor cotto floor over time.

Cotto has always been one of the most appreciated and loved materials and is suitable for both indoor and outdoor coverings:
it is in fact equipped with peculiar characteristics that make it versatile and resistant at the same time. The environments in
which it is located acquire a familiar and welcoming air, in short, a particular charm, all distinctive elements that give them a very
elegant style.

But despite the qualities described above, this precious material often requires careful maintenance, since
it has a tendency to spoil rather easily, putting its original beauty at risk. And none of us would like our outdoor cotto floor to
deteriorate, right ?!

Let’s find out first what are the bitter enemies of outdoor cotto, which too often end up taking away its harmony.

Stains on outdoor cotto

Being a porous material, cotto has a very high probability of staining: damp, mold and limestone are the three
main factors that affect the formation of unpleasant patinas or stains, often very stubborn, and that take off
vigor and brilliance to the material. In addition, with regard to outdoor cotto (terraces, sidewalks …), the exposure
to atmospheric agents leads it even more to damage and lose its beauty.

But don’t worry! Thanks to the work done by the professional craftsman of the RenovoArt company, we will find out how we can do
to remove these annoying stains and unsightly halos on outdoor cotto. In particular, the protagonist of this article
is an outdoor Tuscan cotto floor of a garden. Let’s see better the characteristics of this variant of cotto.

Tuscan cotto

Tuscany is an enchanting region, with a thousand peculiarities, and certainly cotto is an added value that makes this
landscape a magical and characteristic place. In fact, you can find it in houses, churches, palaces, streets and squares,
as a building material and as a decorative element, and is considered the cotto par excellence.

Tuscan cotto is mainly characterized by a red color, which varies according to the area where the clay is extracted.
Versatility and resistance are the two keywords that concern it – both elements that make it
a material able to adapt to both elegant and rustic environments. Despite this, cotto, made up of clay and water,
retains liquids: the porosity makes it easy to create consistent deposits of dirt and thus, to treat outdoor cotto floors,
the best thing to do to ensure a perfect result is to contact the best specialists in the sector.

Marbec | External cotto cleaning Pistoia

The talented craftsman of the RenovoArt company, specialized in the treatment of outdoor and indoor cotto surfaces,
with his great experience and knowledge of the sector, intervened and managed to make an outdoor cotto look like new.
Let’s find out in detail how he carried out the outdoor cotto cleaning to maintain its characteristics over time.

Outdoor cotto cleaning

RenovoArt‘s expert craftsman performed a thorough cleaning on an outdoor cotto floor that had never been treated and
had been contaminated due to biological encrustations, limestone and oil stains.

Marbec | external cotto floor before cleaning

First he applied SGRISER, alkaline detergent / solvent for strong degreasing dewaxing washing on
all stone materials, in order to remove oily stains. Then he used VIACEM, a strong buffered acid cleaner
for cotto and terracotta, brick, klinker and all materials resistant to strong acids.

Marbec SGRISER 1LT | strong de-waxing detergent for stone materials
Wax remover cleaner for removing old oil and / or wax treatments from stone materials in cotto, stone, concrete and grit.


He spread SGRISER on the surface, let it act 48 hours, and then after spreading VIACEM and leaving it in turn
to act 20/30 minutes, intervened with a single brush and a brown disc, rubbing vigorously and rinsing
all with water. Finally he washed the surface with a high pressure washer. Thanks to the combined action of the two products
together with the brown disc, he managed to deeply eliminate all biological and calcareous residues from the surface.

Marbec - VIACEM 1LT | strong acid descaling detergent for cotto and terracotta
Strong descaling detergent for the removal of cement slurry, efflorescences and limestone encrustations


Outdoor cotto maintenance

Once the cleaning was done, to fight the “tough battle” against stubborn stains, he treated the outdoor cotto floor with TIM,
protective for water-repellent and oil-repellent treatments on absorbent stone materials. This product is a panacea
against the appearance of stains and halos, gives the outdoor cotto floor a hydro-oil repellent protection and protects
the material over time, avoiding the formation of efflorescence and dark spots due to rising damp. In addition, it keeps the
material in its original state and prevents or slows down its natural degradation.

Marbec - TIM 1LT | moisture and stain protection for absorbent stone materials
Breathable hydro-oil repellent protective for absorbent stone materials


Later, the RenovoArt professional applied PAV05, a protective finish with excellent anti dirt, anti degradation and
resistance properties for absorbent stone materials placed outside. It gives tone to the material and
an additional water-repellent protection, and has an anti vegetative component inside that significantly reduces the creation
of algae and moss and makes the surface easy to sweep with a mop.

MARBEC | PAV05 1lt Protective finish specific for external stone materials
Finishing wax with excellent anti dirt, anti degradation resistance to atmospheric agents and foot traffic for cotto, stone and cement agglomerates.


Marbec | treatment of an external cotto floor

Thanks to the excellent professional intervention of the brilliant craftsman with Marbec products, combined with proper maintenance
in time that requires the application of PAV05 wax 1-2 times a year, the outdoor cotto will maintain its protective and aesthetic original characteristics over the years and will be protected from the appearance of annoying stains and halos.

Marbec | cleaning external cotto before and after

If you also need to clean and treat outdoor cotto, contact us immediately and ask for a free quote. What are you waiting for?


Click here and look at the portfolio of the works carried out by RenovoArt

26 June 2024 Restoring an external teak floor: step-by-step guide
An external teak floor is an element of great charm and functionality, but over time and exposure to the weather can lose its original appearance, becoming gray and opaque. Restoring its splendor not only improves the aesthetics of your external space, but also contributes to its durability. This step-by-step guide will guide you through the […]
19 June 2024 SOS mold external floors: How to eliminate mold, algae and lichens
After the winter, does your beautiful terrace fill up with mold, moss and algae every year? Let's find out how to eliminate them easily. Follow our advice and quickly remove mold, algae and lichens!
11 June 2024 Guide for cleaning and treatment of cotto, stone and cement placed outside
The importance of protecting and maintaining the external stone, cotto and cement floors cannot be underestimated. Although robust and durable, these floors are exposed daily to varying climatic conditions such as rain, intense sun, frost and pollutants. Without proper maintenance, they can suffer significant damage, such as stains, mold and degradation. Specific treatments not only […]