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Diathonite Thermactive.037

Insulating the building and maintaining the breathability of the wall/ceiling

The insulating action of air

Diathonite Thermactive.037 is formulated with highly porous materials. Air fills the empty gaps in the structure enhancing the thermal insulation. We make the most of the innate properties of nature.

Thermal Conductivity

λ = 0,037 W/mK

The extremely low lambda implies insulation from both cold and heat, therefore it solves problems related to thermal bridges and guarantees a healthy environment and high living comfort.

Thermal Diffusivity

α = 0,1 x 10⁻⁶ m²/s

The low diffusivity value (α) indicates a high degree of insulation from heat and therefore greater comfort and savings for summer cooling.


μ = 3

Thanks to the high value of permeability (μ), the humidity of the indoors is perfectly balanced, thus avoiding the formation of moulds and condensation.

Fire resistant


Classified in class A1 according to UNI EN ISO 13501-1. No flame generation and no smoke emission.


ρ = 250 ± 15% kg/m³

Its macroporous structure and the use of natural components allows the product to be lighter than a traditional plaster. Its performance in terms of insulation and absorption of excess moisture is guaranteed.



The macroporous structure is characterized by high air molecules content that guarantee excellent performance in terms of insulation and absorption of excess moisture.

Compressive strength

2,8 N/mm²

High compressive strength gives the wall greater consistency and stability.

Sustainability certifications

Identifies Diathonite Thermactive.037 as a low environmental impact product with a sustainability that involves all phases of its life cycle.

Recognizes that Diathonite Thermactive.037 has the ability to contribute to healthier spaces, healthy air, better thermal comfort and energy saving.

Performance certifications

The CE marking identifies Diathonite Thermactive.037 as a product complying with European construction standards and the rules governing its distribution and use.

The UKCA marking identifies Diathonite Thermactive.037 as a product complying with UK construction standards and the rules governing its distribution and use.

The product has a low emission of volatile organic compounds, and it is designed to protect the indoor well-being of people and the quality of the external environment.

Protects from cold in winter and overheating summer

Not only an excellent insulation system

  • The best thermal conductivity available in a plaster
  • Breathable and Capillary active
  • Easy thermal bridge solution
  • Euroclass A1 fire resistance, does not burn or smoke so improves fire safety of buildings.
  • Up to 10 times more elastic than traditional plasters reducing the risk of cracks
  • Antibacterial Properties
  • Creates a sympathetic restoration and insulation which maintains the unique characteristic of existing walls allowing them to breathe and balance room humidity
  • 50mm of Thermactive improves the thermal performance of a wall by approximately 4 times keeping walls warm in the winter and cool in summer

Cork: the virtuous
bark of comfort

Natural, renewable, versatile and sustainable

The magic of materials

The main ingredients are lime NHL5, cork, pumice, amorphous expanded silicate, perlite, natural fibres and diatomaceous earth. These are all-natural ingredients and compliment conservation requirements of historic or listed buildings and will contribute to LEED credits.


The resilience of the natural raw material

Hydraulic Lime

The hydraulic binder with high breathability

Natural fibres

Constant resistance and stability over time

Diatomaceous earths

The hidden treasure of the oceans


An original mix of strength and lightness

Silica powder

Inert and ultralight spheres


The sustainable lightness of breathability

Residences of Daniele Crespi: excellent performance on restoration projects

“Architecture means building environment for the people, universities, museums, schools, concert halls: these are all places that become outposts against barbarism.”

Renzo Piano


Thermal well-being formula

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