No. Tierrafino works closely with a network of Fine Earth Dealers who give technical advice and sell our products. You can find an overview here.
Yes, several products are suitable for DIY: I-paint, T-paint, Drypaint, Duro, X-white and Clay Boards. Finish and Base call for some experience. Stone is for professionals or very experienced DIYers, and Antique Provence and Concrete Look are for professionals only. Each product sheet states who the product is suited to.
All product sheets and safety data sheets are on one page: Product sheets & SDS.

Yes, most RAL and NCS colours can be matched in Finish, Duro, Antique Provence, Stone, T-paint, X-white and Concrete Look. Tierrafino makes the sample in its own workshop and confirms the recipe; the plasterer then mixes the colour on site. Please note that Tierrafino charges a development fee for custom colours. See our bespoke page.
Clay and sand are close to neutral: Base, for example, has a pH of around 7. That makes clay plaster gentle on the skin. Stone is different: it is a lime plaster with a pH above 12, so always wear gloves and safety goggles when working with it.
Which primer you need depends on the product and the substrate: Contact for Base, Base Extra Fine and Finish; Contact Fine for I-paint, Drypaint and T-paint; Contact Extra for Duro, X-white, Antique Provence and Concrete Look; Tierracol bonding clay on smooth substrates; Fix as a primer for very absorbent substrates. The product sheet of each product tells you which one to use.
During and just after application, loose grains of sand will come off. That is part of the process: when you finish the surface as described on the product sheet, floated with a sponge and then brushed thoroughly with a horsehair or coconut brush, it becomes rub-resistant.

Our products can be applied to a wide variety of surfaces. The product sheet of each product explains how to prepare the most common substrates. For specific questions, ask your plasterer or your dealer: see our dealer page.
Do not apply clay plaster when the air or substrate temperature is below 5 °C. Keep it frost-free while it dries.

That depends on the product, the layer thickness, the substrate and the weather. Under normal conditions a finishing coat is dry within a few hours to a few days; a base coat can take up to a week. Some products may be dried faster with ventilation or a heater; others must never be force-dried (X-white, Antique Provence, Concrete Look, Tierracol, Stone). Always follow the product sheet.
Properly applied clay plasters can last for centuries. They gain strength over time and can even be rehydrated and reused, making them a truly circular building material.
Clay plaster can absorb and release moisture without losing its strength. It must not come into direct contact with water, such as splashing or running water, as this can dissolve the material. Base, Base Extra Fine, Finish, Duro and X-white are suitable for humid rooms such as a bathroom, but not for places with direct water contact. We advise against Antique Provence, Concrete Look and Drypaint in humid rooms. Wax Acryl, Protect and Intense make clay plaster water-repellent. For places with direct water contact, such as in the shower, choose Stone (tadelakt lime plaster).
Yes, with the right product. Base, Base Extra Fine, Finish, Duro and X-white are suitable for every room, including bathrooms, as long as they stay out of direct contact with water. Antique Provence, Concrete Look and Drypaint are for dry rooms. Stone can be used everywhere, even in the shower.

Clay regulates moisture: it absorbs moisture from the air and releases it again, which helps prevent condensation and creates a comfortable indoor climate.
Yes. Our clay plasters and clay paints contain no substances classified as harmful to fertility, the unborn child or children. As with any powder: do not breathe in the dust while mixing, and keep children away while you mix. Our primers, Fix and I-paint contain a small amount of preservative, like most water-based products; they are not classified as harmful either. Each product sheet gives the details under ‘Children and pregnancy’.
Clay is one of the oldest building materials in the world, and one of the cleanest. Unlike gypsum, it does not have to be heated in a kiln, and unlike latex paint, it is not made from oil. Our clay comes from Europe. A clay wall can be made wet again and reused, so almost nothing is wasted.
Yes, very. Clay does not need to be fired: it hardens simply by drying in the air. That is why clay plaster takes far less energy to make than gypsum or cement, which both have to be heated. Our production does not pollute water. And once on the wall, clay keeps working: it buffers moisture and helps keep the indoor climate stable.

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