Interior bio-based plaster: what criteria should be used to choose a high-performance coating?
The choice of interior wall covering is no longer based solely on its appearance. Composition, compatibility with substrates, indoor air quality, and architectural effect are now also factors considered by designers.
In this context, bio-based interior plaster is attracting increasing interest. But how can we distinguish the truly useful characteristics of a material from the promises that surround it?
A high-performance coating is not defined by a single quality: it is the balance between the material, its use and its implementation that makes the difference.
Interior bio-based plaster: understanding what characterizes it
material
A bio-based material is a material derived, in whole or in part, from renewable biological resources, generally of plant or animal origin.
In the field of interior finishes, this approach opens up new perspectives for professionals who wish to integrate the issue of resources into their design choices.
However, the term "bio-based" does not, in itself, constitute a guarantee of environmental or technical performance.
Two products containing bio-based materials can have very different compositions, behaviors, and application conditions.
To evaluate an interior bio-based coating, it is particularly important to consider the nature of its components, the proportion of bio-based material, any additives, and the technical information provided by the manufacturer.
This reading allows us to go beyond the simple name of the product to understand what it really brings to the project.
Composition: a first criterion, but not the only one
Composition is naturally one of the first elements to examine.
The origin of the raw materials, their processing and other constituents of the formulation can influence the characteristics of the coating.
But a high proportion of bio-based material does not automatically mean that a product has a low environmental footprint.
The analysis should also take into account, where data are available, the manufacturing processes, transport, lifespan, maintenance and end of life of the material.
Verified environmental declarations, particularly FDES where they exist, can provide useful elements for this comparison.
For architects and specifiers, the challenge is therefore to favour a documented approach rather than an interpretation based solely on the natural origin of the components.
Indoor air quality: reviewing the available data
Wall coverings contribute to the interior environment of a building. Their selection therefore deserves special attention, particularly in spaces that are occupied daily.
Emissions of volatile organic compounds, or VOCs, are one of the criteria to consider.
In France, the regulatory labeling of emissions in indoor air, ranging from A+ to C, provides an initial indication of the emission level of certain volatile pollutants.
However, it is important to distinguish between several concepts: a low-emission product is not necessarily a product capable of capturing pollutants present in the air.
Similarly, the bio-based origin of a material does not, in itself, allow us to conclude that it is harmless or has good health performance.
A rigorous specification is based on test data, classifications and technical documents that correspond precisely to the selected product.
Compatibility with supports: anticipating site constraints
A decorative coating must be chosen taking into account its substrate and conditions of use.
The nature of the wall, its porosity, its surface condition, its humidity and any prior treatments can influence the quality of the application.
A poorly prepared surface can compromise adhesion, uniformity of the finish, or durability of the finish.
Before any implementation, several questions must be examined: Is the substrate compatible with the intended plastering system? Is any special preparation required? What are the recommended temperature, humidity, and drying conditions?
The answers should be sought in the manufacturer's instructions and, where necessary, confirmed by preliminary tests.
This step is particularly important in renovation projects, where existing structures sometimes have heterogeneous characteristics.
Texture and architectural rendering: an essential dimension of the choice
The performance of an interior coating is not limited to its technical characteristics.
Matter also plays a role in the perception of a space.
A decorative coating can add depth to a surface, create visual nuances and change the perception of the wall depending on the lighting.
Under raking light, certain reliefs become more perceptible. Under diffuse light, the surface can appear more homogeneous.
These variations contribute to the architectural identity of an interior.
For designers, the choice of texture must therefore be considered in relation to volumes, natural light, surrounding materials and the desired atmosphere.
The goal is not to multiply decorative effects, but to select a finish consistent with the architectural language of the project.
Durability and maintenance: think beyond installation
A suitable coating must be able to withstand the constraints of its environment throughout its intended period of use.
The frequency of passage, the risks of contact, the humidity conditions and the cleaning needs vary depending on the spaces.
The requirements of a bedroom, a reception hall, an office, or a communal circulation area are not necessarily the same.
It is therefore necessary to examine the maintenance recommendations, the resistance of the finishing system under the intended conditions and the possibilities for repair or rework.
Durability depends as much on the properties of the material as on the relevance of its specification and the quality of its implementation.
Making the right choices from the design stage can help limit premature interventions and preserve the aesthetic consistency of the project.
ABSOLIN: incorporating matter into architectural thought
At ABSOLIN , the bio-sourced decorative coating is part of an approach where the material fully participates in the expression of interior spaces.
The value of a coating lies not only in its composition or visual appearance, but also in its ability to meet the project's objectives, while respecting its application conditions.
For architects, decorators and building professionals, this approach encourages them to consider wall coverings as a choice that is simultaneously technical, aesthetic and environmental.
The selection of a finish should therefore be based on the documented characteristics of the product, the constraints of the substrate and the desired architectural result.
Choose a bio-based interior coating with discernment
Choosing an interior bio-based coating means looking beyond its origin and appearance.
Composition, emissions into indoor air, compatibility with substrates, maintenance and quality of finish are all criteria to be examined together.
It is this comprehensive approach that allows the choice of a coating to be included in a coherent and sustainable architectural approach.
Are you an architect, specifier or interior design professional? Discover the world of ABSOLIN and discuss with our team the characteristics of our decorative solutions and their suitability for your project.
Contact: 05 46 99 04 51
Close-up of ABSOLIN bio-based interior plaster showing its decorative wall texture
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