Exterior Wall Coverings

1.Calbonit
Cal bonit

Cal Bonit is a fine decorative plaster for interior and exterior use, made from natural lime putty, selected marble powder, and natural additives.

2.MarmorinoCal
Lime Marmorino

Lime Marmorino is a fine and smooth decorative plaster for indoor and outdoor use.

3.EstucoCal
Lime Stucco

Estuco Veneciano Grassello is a continuous lime-based coating made from air lime, marble powder, and natural additives.

Exterior wall coverings have a vital dual function: on the one hand, protecting the facade from the elements, and on the other, achieving a durable aesthetic appearance that remains intact over time.

At Naturclay, we are committed to natural lime-based mortars and renders, centuries-old solutions that improve the performance of the building envelope, making it much more sustainable and resistant than conventional coatings.

Our Range of Exterior Products

To withstand the demands of the outdoor climate and protect facades effectively, our exterior line focuses exclusively on mineral solutions based on lime, known for their extremely high resistance and breathability. Our catalog includes:

  • Cal Bonit: An excellent fine decorative render for exteriors (and interiors). Its composition based on natural lime putty, selected marble dust, and natural additives makes it a highly breathable solution that protects the facade while giving it a natural and continuous appearance.
  • Lime Marmorino (Marmorino de Cal): A decorative render suitable for exteriors that stands out for offering a fine and smooth finish. Being lime-based, it ensures that the wall can evacuate water vapor, preventing interior dampness caused by condensation in the building.
  • Lime Stucco (Estuco de Cal / Veneciano Grassello): A continuous coating formulated with aerial lime, marble dust, and natural additives. It is the ideal choice for facades seeking a noble finish of great aesthetic value, maintaining all the protective and breathable properties of traditional lime.

Advantages over Industrial Alternatives (Cement and Resins)

Portland cement mortars and acrylic or plastic facade paints are to blame for most pathologies in modern buildings (cracks, flaking, and condensation dampness). Choosing natural lime coverings provides incomparable structural benefits:

  • Prevent flaking and cracking: Unlike cement, which is rigid and cracks with the building’s movements, lime is flexible. It adapts to the natural dilations of the wall, preventing cracks.
  • Total breathability (Zero dampness): Plastic resins seal the facade. Our lime allows the building to “breathe,” evacuating interior water vapor outward. This prevents condensation and structural deterioration.
  • Natural anti-mold and fungicidal protection: Thanks to lime’s highly alkaline pH, our coverings prevent the proliferation of fungi, algae, and microorganisms on the facade, without the need to add chemical biocides.
  • Real sustainability: Cement is one of the largest CO2 emitters on the planet. Lime is produced at a lower temperature and also absorbs CO2 from the environment during its hardening process, drastically reducing its carbon footprint.

Where can they be applied?

Our lime coverings for exteriors are suitable for all types of architectural projects:

  • Commercial premises: For businesses looking to project a polished, ecological, and sustainable image.
  • New build residential facades: To provide natural insulation and avant-garde design.
  • Restoration of historic centers and traditional buildings: Lime is the ideal (and often mandatory) material for restoring ancient facades respectfully using original materials.

FAQ

Cement is a very rigid material that tends to crack and does not allow the wall to breathe. Lime is flexible, adapts to the building’s micromovements to prevent cracks, and allows the facade to breathe, avoiding condensation dampness problems.

Yes, lime coverings have been used outdoors for thousands of years. Once carbonated (hardened), they offer excellent protection against rain and inclement weather, maintaining their vapor permeability.

No. Unlike plastic paints whose synthetic pigments degrade and lose color due to UV radiation, our coverings are tinted with natural mineral pigments that are unalterable to sunlight.

It depends on the condition and type of the previous paint. If it is a plastic paint, it will need to be stripped or a specific bonding primer applied to guarantee mechanical grip, as lime requires a porous substrate to anchor correctly.

On the contrary. Being highly breathable and possessing natural properties that prevent the proliferation of algae and mold, lime facades stay clean and healthy for many more years than those coated with standard acrylic paints.